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TRANSCRIPT
Project Report
For
Govindpur Ph-II OCP (1.2 MTY)
(East Bokaro Coalfield)
Nominal Capacity : 1.2 MTY
Peak Capacity : 1.5 MTY
of
Central Coalfields Limited
DECEMBER’2009
(After CCL Board Approval on 23.12.2009)
Regional Institute-III
STRICTLY RESTRICTED FOR COMPANY USE ONLY
The information given in this report is not to be communicated either directly or indirectly to the press or any other person not holding Official position in the CIL/Government
Project Report for Govindpur Ph-II OCP, CCL CMPDI
C O N T E N T S
Sl.
No.
Chapter
No. Particulars Page No.
1. Summarised Data i - iii
2. List of Appendices iv
List of Drawings v
3. I Introduction Chapter I –1–2
4. II Location, Communication, Topography
& Climate Chapter II –1
5. III Geology Chapter – III-1–32
6. IV Marketability & Linkage Chapter – IV-1–2
7. V Main Technical Decisions for the Quarry Chapter – V-1–13
8. VI Pumping & Drainage Chapter – VI-1–4
9. VII Power Supply, Distribution,
Communication & Illumination Chapter – VII-1–11
10. VIII Coal Handling Plant Chapter – VIII-1–4
11. IX Railway Siding Chapter – IX-1
12. X Workshop Chapter – X-1 – 6
13. XI Manpower & Productivity Chapter – XI –1
14. XII Civil Construction Chapter – XII-1 – 2
15. XIII Water Supply & Sewerage Chapter – XIII-1–3
16. XIV Land Chapter – XIV-1
17. XV Energy Conservation Chapter – XV-1–3
18. XVI Economics Chapter – XVI -1–8
19. XVII Safety & Conservation Chapter – XVII -1– 6
20. XVIII Mine Closure & Environment Chapter – XVIII-1–13
21 Appendices 1X – 51X
22. Approval of CCL Board Annexure – I
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-I-1
CHAPTER- I
1.0 INTRODUCTION:
Govindpur Phase-II OCP is located in Bokaro District of Jharkhand. It is
situated in the north western part of the East Bokaro Coalfield and it is a part
of the Kathara Area of Central Coalfields Limited. It lies adjoining to Sawang
OCP in the west. This Project Report envisages producing 1.2 MTY of ROM
power grade coal (Grade E) from “Geological Report on Coal Exploration
Govindpur North Block, East Bokaro Coalfield” prepared in Dec 2001 and the
area south of Bermo Seam incrop upto 200m depth line on Seam-VI floor in
the south. It is also envisaged to remove both coal and OB departmentally.
1.1 Draft PR of Govindpur Ph-II OCP (0.80 MTY)
Govindpur Opencast is a new mine and a Draft Project Report was prepared
in Feb 2008 to produce 0.8 MTY of coal from the Govindpur North sub-block
of Govindpur Block in East Bokaro Coalfield. Further reserves from an area to
the south of the incrop of Bermo seam has been added to the reserve of
Govindpur North Block and the capacity of the PR enhanced to 1.2 MTY.
1.2 Justification for locating the project in the forest area:
Karo group of seams is proposed to be exploited in Govindpur Ph II OCP. It is
a huge source of non-coking coal. This reserve of 19.53 MT non-coking coal
lies below the patches of forest and non-forest land. Hence, unless the forest
land above the coal seams is released, the coal seams cannot be exploited.
Mining being site specific it is not possible to divert the operations to non-
forest land.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-I-2
1.3 SCOPE OF THIS PROPOSAL
In this proposal of Govindpur Ph-II OCP (1.2 MTY):
a) The reserve from an area to the south of the incrop of Bermo seam was
added to the reserve of Govindpur North Block and the capacity of the PR
was increased to 1.2 MTY.
b) The option proposed in the present PR for Govindpur Ph-II OCP (1.2 MTY).
They are detailed as under:
OPTION-I
Coal Production Departmental
OB removal Departmental
Average Grade E
CHP Coal size (-) 100mm
Evacuation of
coal
Pipradih Railway
Siding
c) The proposal envisages for shovel dumper combination of mining.
d) Departmental Coal Handling Plant is proposed. Product size of (-) 100 mm
has been proposed.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-II -1
CHAPTER – II
2.0 LOCATION, COMMUNICATION, TOPOGRAPHY & CLIMATE
2.1 Location
The Govindpur North Block covering an area of 1.75 sq km lies between
latitudes 23o48'30" & 23o49'30" N and longitudes 85o51'15" & 85o52'45" E.
It is included in the Survey of India Toposheet No. 73E/13. The block lies
to the east of Sawang Colliery.
2.2 Communication
Govindpur Ph-II OCP is well connected by rail and road. The Gomoh-
Barkakana loop line of Eastern-Central Railway is about 2km from the
project. Bokaro Thermal Power Railway Station is the nearest railway
station. The OCP is about 80km from Hazaribagh. It is about 130km from
Ranchi via Ramgarh - Tenughat Dam road. The Sawang colliery was
connected to this Project by a seasonal causeway over Konar River, which
has been washed away. It is being proposed to construct a bridge over
Konar River at the same place.
2.3 Topography
The surface topography of the block is shown in Drg. No. RI-3/G/5707.
The block is usually slightly rolling with gentle southerly slope. The
maximum elevation is 318m above MSL and minimum 231 & 240m along
the flanks of Konar River & Montico Nala respectively. The Project lies in
the catchment area of Konar River & Montico Nala. The Konar river flows
in the south easterly direction and the Montico nala flows in the south
direction and joins the Konar River to the south of the block.
2.4 Climate
The area experiences semi to extreme climate with day temperature as
high as 450C during the summer, which falls down to around 50C in night
during winter. The rainy season lasts from mid June to mid September.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -1
Chapter-III
Geology of the Block
3.1.1 General:
The Gobindpur North OC Block with an area of 1.55 sq km is located in the NW
part of East Bokaro Coalfield, and is under the administrative control of Kathara
Area of CCL. The OC block is part of the area covered in Geological Report on
Gobindpur Block prepared by CMPDI in 1993 wherein it has been designated as
‘Gobindpur North Sub Block’. This is the northern most part of Gobindpur Block
where all the Karo group of seams are available. The Upper Karo group of seams
are thick with open cast potentiality while the lower Karo group seams have
underground potentiality only. The details given in this report are based on the
‘Geological Report on Coal Exploration, Govindpur North Block (Karo Group of
Seams)’ prepared by CMPDI in December, 2001.
3.1.2 Location:
The Gobindpur North OC Block covering an area of 1.55 sq km lies between the
latitudes 23 deg 48’ 30” to 23 deg 49’ 30”and longitudes 85 deg 51’ 15” to 85 deg
52’ 45” and is included in the Survey of India Toposheet no 73E/13. The block lies
to the immediate east of Sawang Colliery and some distance to the north of
Bokaro TPS of DVC.
3.1.3 Limits of Gobindpur North Block :
North: E-W trending Karharbari/Metamorphic contact
South: 200m depth line on floor of Seam-VI (south of Incrop of Bermo
Seam)
East: Surface trace of fault F16 (near Govindpur –Pichri fault)
West: Fault F7 (near Borrea Fault)
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -2
3.1.4 Communication :
The Gobindpur North OC Block is very well connected by rail and road. The
Gomoh-Barkakana loop line of EastCentral Railway passes about 2 km south of
the southern boundary of the block where Bokaro thermal Power railway station is
the nearest railway station. The Hazaribagh-Bermo metalled road passes close to
the northern and eastern sides of the block. The block is about 80km from
Hazaribagh and 2km from Kathara GM office.
3.1.5 Topography and Drainage :
The northern region is extremely hilly on account of outcrops of basal
Barakar Formation, which are hard, compact and resistant to weathering. The
southern region is slightly rolling with gentle southerly slope. The maximum
elevation in the hill region is 331 m above MSL and minimum is 231m and 240m
along the flanks of Konar River and Montico Nala respectively. The entire
Gobindpur North Block lies in the catchment area of the Konar River, which is a
perennial and major tributary of Damodar River.
3.1.6 Climate:
The block lies in tropical monsoon region with day temperature during summer
rising to as high as 45 0 C and fall down to around 5 0 C in winter. The rainy
season lasts from middle June to Mid September.
3.1.7 Previous Work :
The IBM (1959), NCDC (1965), CCL and CMPDI (1993 and 2001) explored the
area through drilling. The present PR is based on the latest GR of CMPDI on
Gobindpur North Block (December, 2001).
3.2.1 Drilling:
Drilling in the block was taken up by various agencies at various periods of time:
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -3
Table 3.1
Agency Phase BH Code No of BH drilled Meterage Drilled
(A)Within the Block
(i) NCDC NCBG 7 659.27m.
(ii) CMPDI CMEG 28 1988.25m
Total 34 2647.52m
The borehole density comes out to be 22 boreholes per sq km.
3.3.1 Geology of the Block
The Gobindpur North OC Block forms a segment of the northern limb of the main
synclinal basin of East Bokaro coalfield. It is located in the western part of the
coalfield in which rocks of Karharbari and Barakar formations are preserved in a
‘graben’ between ‘Borrea Fault’ in the west and ‘Govindpur-Pichri Fault’ in the
east. In this block, rocks belonging to the lower part of the Kargali-Karo stage are
lying over metamorphics. The generalized stratigraphic sequence is given below:
Table 3.2
Geological succession of Gobindpur North O/C Block
Age Formation Rock Types
Recent - Soil & Alluvium
Post Gondwana Intrusive Lamprophyres & Dolerite Dykes and sills
Barakar Coarse to medium grained arkosic sandstone,
carbonaceous shale and coal seams (Karo-V to XI)
Lower Permian
Karharbari Very Coarse grained sandstone, grits (sometimes
siliceous), pebble beds, carbonaceous shale and
coal seams(Karo-IV to I)
Upper
Carboniferous
Talchir Shales , shaly and fine grained sand stones,
occasional pebble beds.
Unconformity
Pre-Cambrian Granite-gneiss. Amphibolite and mica schist
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -4
3.3.2 Geological Structure
As mentioned earlier The Gobindpur North OC Block forms a segment of the
northern limb of the main synclinal basin of East Bokaro coalfield. Also that it is
located in a ‘graben’ between ‘Borrea Fault’ in the west and ‘Govindpur-Pichri
Fault’ in the east. In this block, other faults present in the Block are tabulated
below:
Table 3.3
Details of faults present in Gobindpur North O/C Block
Fault Strike
direction
Throw
direction
Throw
Amount
Evidences
F7 NS E 30-40m Omission of seam-VIII in Cmeg-53
F8 NW-SE SW 5-10m Floor level differences
F9 NNW-SSE E 5-10m Omission of seam in NCBG-7
F11 NNW-SSE E 30m Floor level differences
F12 NW-SE NW 10m Reduction in partings
F13 NW-SE NW 10-15m Floor level differences
3.4.1Sequence of coal seams
Following is the stratigraphic sequence of coal seams present in the block:
Table 3.4
Details of coal seams & partings, Gobindpur North O/C Block
Seam Thickness (m) Generalised range (m)
Full seam intersections
Minimum Maximum Soil 0.00 6.50 2-4
Strata above Seam-XI
12.57 NCBG-8
54.45 (CMEG-116)
30-40 4
Parting 4.48 7.95
Seam-X 7.45
(CMEG-112) 12.52
(NCBG-27) 7-8 7
Parting 0.36 5.87
Seam-IX 0.91
(NCBG-16) 3.79(CMEG-
112) 2-3 9
Parting 9.27 31.55
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -5
Seam Thickness (m) Generalised range (m)
Full seam intersections
Seam-VIII 20.38
(CMEG-113) 30.05
(CMEG-99) 22-23 12
Parting 10.17 14.57
Seam-VII-Top 0.69
(CMEG-110) 7.31
(NCBG-8) 3-4 22
Parting 0.31 3.82
Seam- VII-Bot 1.00
(CMEG-110) 4.38
(CMEG-65) 2-4 23
Parting 0.22 5.93
Seam-VI 0.40
(CMEG-46) 3.26
(CMEG-111) 2-3 21
Parting 27.58 48.70
Seam-V 0.62
(CMEG-36) 2.48
(CMEG-112) 1.5-2 20
Parting 19.52 32.62
Seam-IV 1.45
(CMEG-50) 3.70
(CMEG-42) 2-3 22
Parting 4.91 12.45
Seam-III 0.49
(CMEG-41) 3.30
(CMEG-78) 1.7-3 21
Parting 10.56 26.76
Seam-II 0.04
(CMEG-101) 0.51
(CMEG-108) 0.30-0.60 5
Parting 2.57 8.57
Seam-I 0.37
(CMEG-107) 0.61
(CMEG-101) 0.40-0.60 3
3.4.2 Description of seams
Gobindpur North OC Block is located in an area where only lower stage of Barakar
formation and Karharbaris are exposed. Therefore only Karo group of seams
starting from Karo-I to Karo-XI have been encountered in the boreholes. Bermo
seam and seams above it incrop further down dip to the south of the boundary of
the block.
Seam VIII is the thickest seam but is highly interbanded. Seam VII Top, VII Bottom
and VI form a packet of three distinctly identifiable horizons, which nearly merge
with each other at a few places in the block. Seam V, IV and III are comparatively
thin and are amenable to underground mining only. Seams II and I are very thin
and impersistent.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -6
Due to their thickness and occurrence in shallower depth, the seams, Karo-VI and
above (upto seam-XI) have been identified for exploitation by open cast methods.
Although the coal seams in the block are of coking nature, their ash content is on
rather higher side. Therefore the grades of seams are given both on coking and
non-coking basis for areas where ash% is more than 35%.
3.4.2 Seam-XI
This is the top most seam of Karo Group in the block occurring 5.03m to 5.60 m
below Bermo Seam which incrops along the southern limit and 4.48m to 7.95m
above underlying Karo-X Seam. The Incrop of Seam-XI occurs in an E-W strike
length of 1.5 km. In the southern part of the block, it underlies Seam X/IX with a
parting of 23.47m (NCBK-02) to 24.60m (CMEK-95).
The details of borehole intersections of this seam are given below:
Table 3.5
Details of borehole intersections of Seam-XI in Govindpur North Block
Floor depth below G.L.
(a) Shallowest 14.88m (NCBG-8)
1
(b) Deepest 59.94m (CMEG-68)
F.R.L
(a)Highest 240.02m (CMEG-110)
2
(b)Lowest 217.00m (CMEG-68)
No. of BH intersections
(a) Unfaulted 5
(b) Faulted / Partially Faulted -
3
c) Burnt -
d)Incrop -
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -7
Thickness:
The thickness of Seam-XI generally varies from 1.70m (CMEG-97&-16) to 2.48m
(CMEG –112). However in western part in borehole no NCBG-7 the thickness of
the seam has further reduced to 1.22 m. The Thickness is around 2m in rest of the
area.
Roof and floor
The immediate roof of the seam is composed of alternate shale and sandstone,
shaly sand stone and occasionally sandy shale. Carbonaceous shale, shale and
sandy shale form the immediate floor of the seam.
Dirt Bands:
Table 3.6
Range of Dirt Bands in Seam-XI
Details Minimum Bh No CMEG-
Maximum Bh No CMEG-
Nos considered
Seam Thickness
1.70 99,116 2.48 112 11
i) Including dirt bands +NCB
1.70 99,116 2.48 112 11
ii) Including bands (I-30)
1.70 99,116 2.48 112 11
iii) Ex band 1.70 99,116 2.48 112 11 2)a..Dirt bands >0.05-0.30m A) Number - 110,113 1 110,113 2 B) Thickness
1) Individual 0.07 113 0.25 110 2 2) Aggregate 0.07 113 0.25 110 2
2) b Dirt bands 0.30-1.00m A) Number NIL NIL NIL NIL NIL B) Thickness
1) Individual NIL NIL NIL NIL NIL 2) Aggregate NIL NIL NIL NIL NIL
2) c Dirt bands >1.00m A) Number NIL NIL NIL NIL NIL B) Thickness
1) Individual NIL NIL NIL NIL NIL 2) Aggregate NIL NIL NIL NIL NIL
Note: NCB=non combustible bands
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -8
Effect of igneous Intrusion: Seam-XI has not been found to be affected by igneous
intrusion in any of the boreholes in the block.
Quality
Table 3.7
Quality characteristics of Seam-XI in Gobindpur North Block No. of BH considered = 5 Thickness Range
1.70 (CMEG-99, 116) to 2.48m (CMEG-, 112)
Proximate Analysis (as analysed basis) Ex band bcs In band M% 1.0 - 1.6 1.0-1.6 1.0-1.6 A% 25.2 – 36.1 29.1 – 36.1 30.9-37.4 VM% 18.1 –23.1 18.2 – 20.8 18.2 – 21.6 CV(K Cal/Kg) 5440 - 5820 5040 - 5620 5040 - 5380 UHV(K Cal/Kg)
3780 - 5257 3753 - 4719 3601 - 4498
W-I – W-IV W-III – W-IV W-IV – UG W-IV – UG
Grade (a)Coking ---
Range General
(W-IV) (W-IV) (W-IV) (W-IV)
D - E D - E D - E
Grade b) Non-Coking
Range General
(D) (D-E) (D-E)
Ultimate Analysis Unit coal basis As analysed
basis Ex band bcs I VM% 21.1 24.4 24.4-28.7 24.4-29.7 C% 56.38 87.85 H% 3.24 5.05 N% 1.16 S% 0.35 P% 0.107 CO2% 0.53 CV(K Cal/Kg) 8655 8330 8283 Other Tests CI - CT G SI 1
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -9
Grade: The above data indicates that the coal from Seam-XI is having low
moisture, medium volatile matter and medium to high ash content. The In-band
coking grade of the seam is ‘Ungraded’ to Washery grade-IV while the same as
per non-coking norms is E to D.
3.4.3 Seam-X
Seam –X occurs 4.48 m (CMEG-68) to 7.95m(NCBG-7) below Seam XI and
0.36m(NCBG-27) to 5.87m (CMEG-98) above underlying Karo-IX Seam.
The Incrop of Seam-X also occurs in an E-W strike length of 1.5 km in the
southern part of the block.
The details of borehole intersections of this seam are given below:
Table 3.8
Details of borehole intersections of Seam-X in Gobindpur North Block
Floor depth below G.L.
(a) Shallowest 29.13m (NCBG-8)
1
(b) Deepest 63.08m (CMEG-68)
F.R.L
(a)Highest 246.66m (NCBG-16)
2
(b)Lowest 195.36m (CMEG-99)
No. of BH intersections 12
(a) Unfaulted 7
(b) Faulted / Partially Faulted 2/1
3
c) Burnt 1
d)Incrop 1
Thickness:
The thickness of Seam-X generally varies from 7.45m (CMEG-112) to 12.52m
(NCBG –27). Maximum thickness is found around borehole no NCBG-8 and
CMEG-70 in central part of the block. The thickness of the seam is around 7 to8m
in rest of the area.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -10
However in one borehole (CMEG-64) in the western part shows a thickness of
11.27m which is an isolated case.
Roof and floor
The immediate roof of the seam is composed of shale and sandy shale and
occasionally alternate shale and sandstone. Sandy shale and occasionally sand
form the immediate floor of the seam.
Dirt Bands:
Table 3.9
Range of Dirt Bands in Seam-X
Details Minimum Bh No CMEG-
Maximum Bh No CMEG-
Nos considered
Seam Thickness
i)Including dirt bands +NCB
7.45 112 11.27 64 10
ii)Including bands(I-30)
7.27 39 10.93 64 10
iii)Ex band 7.27 39 10.65 64 10 2)a..Dirt bands >0.05-0.30m ( No band in 2 boreholes out of 9 analysed) A) Number 1 64,69,98 5 70 7 B) Thickness
1)Individual 0.07 70,95 0.29 99 7 2)Aggregate 0.11 68 0.77 70 7
2)b..Dirt bands 0.30-1.00m A) Number 1 39,113 2 98 3 B) Thickness
1)Individual 0.32 98 0.40 116 3 2)Aggregate 038 39 0.65 98 3
Non –combustible bands A) Number 1 113 2 64 2 B) Aggregate
Thickness 0.10 113 0.34 64 2
Note: NCB=non combustible bands
Effect of igneous Intrusion: Seam-XI has been found to be affected by igneous
intrusion in only one of the boreholes (CMEG- (99) in the block where top section
of the seam has been devolatalised.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -11
Quality
Table 3.10
Quality characteristics of Seam-X in Gobindpur North Block No. of BH considered = 7 Thickness Range
7.19 (CMEG-99) to 11.27m (CMEG-64)
Proximate Analysis(as analysed basis) Ex band bcs In band M% 0.9 – 3.9 0.9 – 3.9 0.8 – 3.9 A% 20.6 – 32.5 26.3 – 34.3 28.3-38.1 VM% 21.0-24.4 19.1 – 22.1 19.1 – 21.0 CV (K Cal/Kg) 5080 - 5740 5190 - 5420 4820 - 5420 UHV (K Cal/Kg)
4015 - 5008 3960 - 4629 3449 - 4607
W-I – W-IV W-III – W-IV W-IV – UG
Grade (a)Coking ---
Range General
(W-IV) (W-IV) (W-IV)
D - E D - E D - E
Grade b)Non-Coking
Range General (D) (D-E) (D-E) Ultimate Analysis
Unit coal basis As analysed basis Ex band bcs I
VM% - 27.2 – 29.6 25.0-28.0 25.4-28.6 C% 55.75 87.88 H% 3.25 5.15 N% 1.18 S% 0.34 P% 0.116 CO2% 0.62 CV(K Cal/Kg) 8119-8613 8171-8521 8285-8703 Other Tests CI - CT G SI 1
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -12
Grade: The above data indicates that the coal from Seam-X is having low
moisture, medium volatile matter and medium to high ash content.The In-band
coking grade of the seam is ‘Ungraded’ to Washery grade-IV while the same as
per non-coking norms is E to D.
Beneficiation
Washability studies were carried out earlier on the coal cores from NCBG-
16, the details of which are as follows:
Table 3.11
Screen Analysis
13mm - 0.4mm (-) 0.4mm
Cleans at 1.50 Overall
Ash%
(calculated) Wt% Ash% Wt% Ash% Wt% Ash%
36.8% 97.9 37.1 2.1 25.0 29.0 26.6
Some more such studies have been carried out in adjoining Govindpur Block,
details of which are available in the G.R. of the block.
3.4.4 Seam-IX
Seam –IX occurs 0.77 m (CMEG-113) to 5.87m (CMEG-99) below Seam X and
9.27m (NCBG-7) to 25.29m (CMEG-98) above underlying Karo-VIII Seam. The
seam is almost merged with Seam-VIII around borehole CMEG-113.
The Incrop of Seam-X also occurs in an E-W strike length of 1.5 km. about 40 to
50m north of incrop of Seam X in the block.
The details of borehole intersections of this seam are given below:
Table 3.12
Details of borehole intersections of Seam-IX in Govindpur North Block
Floor depth below G.L.
(a) Shallowest 32.81m (NCBG-8)
1
(b) Deepest 78.75m (CMEG-68)
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Job No. 340721 Chapter-III -13
F.R.L
(a)Highest 256.11m (CMEG-43)
2
(b)Lowest 190.37m (CMEG-99)
No. of BH intersections 11
(a) Unfaulted 7
(b) Faulted / Partially Faulted 2/nil
3
c) Burnt nil
d)Incrop 2
Thickness:
The thickness of Seam-IX generally varies from less than a meter (0.91 in NCBG –
16 only) to 3.79m (CMEG –112). Maximum thickness is found around borehole
no CMEG-112 in the central part and in the eastern most part (CMEG-38) of the
block. The thickness of the seam is around 2m in larger part of the block.
Roof and floor
The immediate roof of the seam is composed of carbonaceous shale followed by
fine to medium grained sandstone and occasionally sandy shale/shaly sandstone.
The floor of the seam is composed of shaly sandstone and sandy shale and
occasionally alternate shale and sandstone.
Dirt Bands:
Table 3.13
Range of Dirt Bands in Seam-IX
Details Minimum Bh No
CMEG-
Maximum Bh No
CMEG-
Nos
considered
Seam
Thickness
1.35 39 3.79 112 13
i)Including
dirt bands
+NCB
1.35 39 3.59 112 13
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Job No. 340721 Chapter-III -14
ii)Including
bands(I-30)
1.35 39 3.29 112 13
iii)Ex band
2)a..Dirt bands >0.05-0.30m ( No band in 5 boreholes out of 13 full seam analysed)
A) Number 1 39,70,113 2 64,98,112 8
B) Thickness
1)Individual 0.05 70,113 0.21 112 8
2)Aggregate 0.05 70,113 0.30 112 8
2)b..Dirt bands 0.30-1.00m
A) Number 1 40 1 40 1
B) Thickness
1)Individual 0.34 40 0.34 40 1
2)Aggregate 0.34 40 0.34 40 1
Non –combustible bands
A) Number 1 39,40,64 1 39,40,64 4
B) Aggregate
Thickness
0.06 64 0.20 112 4
Note: NCB=non combustible bands
Effect of igneous Intrusion: Seam-XI has not been found to be affected by
igneous intrusion in any of the boreholes
Quality
Table 3.14
Quality characteristics of Seam-IX in Gobindpur North Block
No. of BH considered = 9
Thickness
Range
0.91m (NCBG-16)
to
3.79m (CMEG-112)
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Job No. 340721 Chapter-III -15
Proximate Analysis (as analysed basis)
Ex band bcs In band
M% 0.9 – 1.3 0.8 – 1.5 0.9 – 1.5
A% 22.5 – 31.5 22.5 – 38.6 23.6-44.8
VM% 20.1-25.4 17.8 – 22.6 17.2 – 22.6
UHV
(K Cal/Kg)
4371 - 5671 3463 - 5671 2511 - 5491
W-II – W-IV W-II – UG W-IV – UG
Grade
(a) Coking ---
Range
General
(W-III – W-IV) (W-III – W-IV) (W-IV-UG)
B-D B - E C-F
Grade
b) Non-Coking
Range
General (C-D) (D-E) (D-E)
Ultimate Analysis
Unit coal basis As analysed
basis Ex band bcs I
VM% 22.6 25.0 – 31.4 25.0-29.5 25.0-28.0
C% 58.43 88.26 61.47 88.69
H% 3.32-3.55 5.09-6.10
N% 1.10-1.15
S% 0.45-0.55
P% 0.08
CO2% 0.51-0.58
CV(K Cal/Kg) 8410-8556 8407-8589 8296-8543
Other Tests
CI -
CT F-G
SI 1
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Job No. 340721 Chapter-III -16
Grade: The above data indicates that the coal from Seam-IX is having low
moisture, medium volatile matter and medium to high ash content. The In-band
coking grade of the seam is ‘Ungraded’ to Washery grade-IV while the same as
per non-coking norms is E to D.
3.4.5 Seam-VIII
This is the thickest as well as most prospective seam of Karo Group in the block. It
lies 9.27m (NCBG-7) to 31.55 m (CMEK-52) below Seam IX and 4.02m (NCBG-
12) to 14.57m(CMEK-113) above underlying Karo-VII Top Seam. This is a highly
banded seam and has been intersected in 31 boreholes. Details of borehole
intersections of this seam are given below:
Table 3.15
Details of borehole intersections of Seam-VIII in Gobindpur North Block
Floor depth below G.L.
(a) Shallowest 8.10m (CMEG-36, 102)
1
(b) Deepest 113.80m (CMEG-99)
F.R.L
(a)Highest 29.64m (CMEG-36)
2
(b)Lowest 137.52m (CMEG-99)
No. of BH intersections 27
(a) Unfaulted 20
(b) Faulted / Partially Faulted 1/3
3
c) Burnt 1
d) Incrop 2
Incrop: The incrop of Seam-VIII also occurs in an E-W strike length of 1.5 km.
running parallel to and at about 40 to 50m north of incrop of Seam IX in the block.
Thickness:
The thickness of Seam-VIII varies from 20.38m (CMEG-113) to 30.05m (CMEG –
99). However it is generally around 22m to 23m in the area.
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Job No. 340721 Chapter-III -17
Roof and floor
The immediate roof of the seam VIII is composed of carbonaceous shale followed
by medium to fine grained sandstone at top. The floor generally comprises of
sandy shale and shaly sand stone and occasionally medium to fine grained
sandstone.
Dirt Bands:
As evident from the band-by-band analysis of the seam in 16 boreholes the Seam
VIII contains large no of combustible and non-combustible bands.
Table 3.16
Range of Dirt Bands in Seam-VIII
Details Minimum Bh No CMEG-
Maximum Bh No CMEG-
Nos considered
Seam Thickness i)Including dirt bands +NCB
20.38 113 30.05 99 16
ii)Including bands(I-30)
15.28 40 26.27 52 16
iii)Ex band 12.18 40 16.66 52 16 2)a..Dirt bands >0.05-0.30m NIL in two boreholes. (CMEG-40 & 43) A) Number 1 38,41,42,99 11 52 14 B) Thickness
1)Individual 0.07 52,113 0.30 107,109 14 2)Aggregate 0.10 99 1.65 52 14
2)b..Dirt bands 0.30-1.00m NIL in one borehole. CMEG-99 A) Number 1 43,63,98 5 52 14 B) Thickness
1)Individual 0.32 52 0.99 41 14 2)Aggregate 0.37 43 2.57 70 14
2)c..Dirt bands >1.00m NIL in 8 boreholes (CMEG-38,52,63,64,107,110,113,116) A) Number 1 41,70,99,109 5 40 14 B) Thickness
1)Individual 1.04 42 3,27 40 14 2)Aggregate 1.07 70 9.04 40 14
Note: NCB=non combustible bands
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Job No. 340721 Chapter-III -18
Effect of igneous Intrusion:
Seam-VIII has been found to be affected by igneous intrusion in two
boreholes (CMEG-70 & 112) in the block. In CMEG-70 only the top most 0.11m
section of the seam has been devolatilised, while in CMEG-112 this seam as well
as seams below it has been partly burnt.
Quality
Table 3.17
Quality characteristics of Seam-VIII in Gobindpur North Block No. of BH considered = 15 Thickness Range
20.38 (CMEG-112) to 30.05m (CMEG-99)
Proximate Analysis(as analysed basis) Ex band bcs In band M% 0.8 - 1.2 0.8-1.3 0.7-1.4 A% 27.7 – 30.2 27.5 – 39.4 33.2 – 43.9 VM% 18.6 –22.0 18.3 – 20.5 16.2 – 18.8 CV(K Cal/Kg) 5480 - 5920 5350 - 5540 4030 - 4860 UHV(K Cal/Kg)
4567 - 4926 2325 - 4622 2731-3891
W-III – W-IV UG – W-IV UG-W-IV
Grade (a)Coking ---
Range General
(W-IV) (W-IV) (W-IV)
D D - F E_F
Grade b)Non-Coking
Range General (D) (D) (F) Ultimate Analysis
Unit coal basis As analysed basis Ex band bcs I
VM% 23.4-28.3 23.4 – 27.4 23.2-26.6 C% 60.18 88.53 H% 3.43 5.06 N% 1.00 S% 0.40 P% -
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Job No. 340721 Chapter-III -19
CO2% 0.5 CV (K Cal/Kg) 8287-8665 8291-8483 7916-8760 Other Tests CI - CT D/E SI 1
Grade:
The above data indicates that the coal from Seam-VIII is having low moisture,
medium volatile matter and medium to high ash content. The In-band coking grade
of the seam is ‘Ungraded’ to Washery grade-IV while the same as per non-coking
norms is F to E.
Beneficiation
Washability studies were carried out earlier on the coal cores from NCBG-16 as
well as that from a borehole from borehole NCBG-11 from adjoining block, the
details of which are as follows:
Table 3.18
Screen Analysis
13mm - 0.4mm (-) 0.4mm
Cleans at 1.50
B.H.No.
Raw coal
Ash%
Wt% Ash% Wt% Ash% Wt% Ash%
NCBG-16 45.2 98.3 45.5 1.7 30.4 21.3 18.36
NCBG-11 38.7 97.0 39.1 3.0 25.2 31.9 17.6
Some more such studies have been carried out on coal core from borehole no.
CMEG-82 and in adjoining Govindpur Block, details of which are available in the
G.R. of the block.
3.4.6 Seam-VII Top
Seam-VII Top occurs 10.17 m (CMEG-98) to 14.57m(CMEG-113) below Seam
VIII and 0.31m (CMEG -53) to 3.82m (CMEG-113) above underlying Seam-VII
Bottom
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Job No. 340721 Chapter-III -20
The details of borehole intersections of this seam are given below:
Table 3.19
Details of borehole intersections of Seam-VII Top in Gobindpur North Block
Floor depth below G.L.
(a) Shallowest 5.43m (CMEG-78)
1
(b) Deepest CM-99-123.12M 126.45m (CMEG-112)
F.R.L
(a)Highest 285.16m (CMEG-78)
2
(b)Lowest 123.12m (CMEG-99)
No. of BH intersections 22
(a) Unfaulted 19
(b) Faulted / Partially Faulted 1/-
3
c) Burnt 1
d)Incrop 1
Incrop
The Incrop of Seam-VII Top is available in an E-W strike from 40 to 50m north of
Seam-VIII incrop on ground. But incrops of Seam-VII Top, VII Bottom and VI occur
in close proximity to each other due to existence of very thin parting between
them.
Thickness:
The thickness of Seam-VII Top is very erratic due to development of bands near
the roof and floor and their selective inclusion/exclusion from the seam thickness
depending on the economic viability. Thickness varies from 0.69m (CMEG-110) in
the south-western part to 7.38m (CMEG-50) in the north-eastern part. But
generally the thickness lies between 2 to 3m in remaining parts.
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Job No. 340721 Chapter-III -21
Roof and floor
The immediate roof of Seam-VII Top is generally carbonaceous shale and
occasionally grey shale/sandy shale topped by fine-grained sandstone and
occasionally alternate shale and sandstone. Grey shale and sandy shale generally
constitute the immediate floor of the seam.
Dirt Bands:
Table 3.20
Range of Dirt Bands in Seam-VII Top
Details Minimum Bh No
CMEG-
Maximum Bh No
CMEG-
Nos
considered
Seam
Thickness
0.69m
110
2.38
98
i)Including
dirt bands
+NCB
0.50 63 2.38 98 30
ii)Including
bands(I-30)
0.50 63 2.38 50 30
iii)Ex band 0.50 63 2.31 52 30
2)a..Dirt bands >0.05-0.30m - NIL in 23 boreholes out of 30 analysed for full thickness
A) Number 1 52 1 98 7
B) Thickness
1)Individual 0.12 52 0.30 98 7
2)Aggregate 0.12 52 1.65 98 7
Note: NCB=non combustible bands
Effect of igneous Intrusion:
Seam-VIII has been found to be completely burnt by igneous intrusion in
only one borehole (CMEG-112) in the block.
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Job No. 340721 Chapter-III -22
Quality
Table 3.21
Quality characteristics of Seam-VII Top in Gobindpur North Block No. of BH considered = 22 Thickness Range
0.69m (CMEG-110) to 2.31m (CMEG-50)
Proximate Analysis (as analysed basis) Ex band bcs In band M% 0.5 – 5.2 0.5 – 5.2 0.5 – 5.2 A% 22.6 – 34.4 26.3– 42.2 27.7-46.6 VM% 17.8-26.7 17.8-26.7 17.8-26.7 CV(K Cal/Kg) 4890 - 6000 4890 - 6000 4890 - 6000 UHV(K Cal/Kg)
3987- 5712 2911 - 5177 2304-4981
W-II – W-IV W-III – UG W-III – UG
Grade (a)Coking ---
Range General
(W-II-W-IV) (W-III-UG) (W-III-UG)
D D - F E_F
Grade b)Non-Coking
Range General
(D) (D) (F)
Ultimate Analysis Unit coal basis As analysed
basis Ex band bcs I VM% 18.8 20.9-28.7 22.9– 29.9 22.9-29.9 C% 54.44 88.81 H% 3.02 4.03 N% 0.90 S% 0.43 P% - CO2% 0.58 CV(K Cal/Kg) 7995-8682 7995-8682 7995-8682 Other Tests CI - CT D SI 1
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Job No. 340721 Chapter-III -23
Grade: The In-band coking grade of the Seam-VII Top is ‘Ungraded’ to Washery
grade-III while the same as per non-coking norms is F to G.
3.4.7 Seam-VII Bottom
Seam-VII Bottom occurs 0.31 m (CMEG-53) to 3.82m(CMEG-112) below Seam
VII Top and 0.22m (CMEG -50) to 5.93m (CMEG-101) above underlying Seam-VI.
The Seam-VII Bottom is almost merged with Seam-VII-Top in borehole CMEG-36,
53 and 78 with a parting of grey shale measuring 0.70, 0.31 and 0.52m
respectively. The seam is almost merged with Seam –VI in borehole CMEG-50
where the parting is only 0.22m.
.
The details of borehole intersections of this seam is given below:
Table 3.22
Details of borehole intersections of Seam-VII Bottom in Gobindpur North Block
Floor depth below G.L.
(a) Shallowest 13.52m (CMEG-101)
1
(b) Deepest 136.60m (CMEG-116)
F.R.L
(a)Highest 282.39m (CMEG-78)
2
(b)Lowest 252.39m (CMEG-115)
No. of BH intersections 23
(a) Unfaulted 19
(b) Faulted / Partially Faulted 1/-
3
c) Burnt 2
d) Incrop 1
Incrop
The incrop of Seam-VII Bottom is available in an E-W strike on ground and runs in
close proximity to incrops of Seam-VII Top and VI due to existence of very thin
parting between them.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -24
Thickness:
The thickness of Seam-VII Bottom varies from 1.00m (CMEG-110) in the south-
western part to 4.38m (CMEG-65). But generally the thickness remains around 2-
4m in remaining parts.
Roof and floor
The immediate roof of Seam-VII Bottom is generally shale/ sandy shale and
occasionally sandstone. The immediate floor is generally shaly sandstone or fine
to medium grained sandstone.
Dirt Bands:
Table 3.23
Range of Dirt Bands in Seam-VII Bottom
Details Minimum Bh No
CMEG-
Maximum Bh No
CMEG-
Nos
considered
Seam
Thickness
i)Including
dirt bands
+NCB
1.00 110 5.25 95 23
ii)Including
bands(I-30)
1.00 110 5.25 95 23
iii)Ex band 1.00 110 5.25 95 23
Effect of Igneous Intrusives :
The seam is partly burnt in CMEG-42 and 113 and is completely burnt in Seam-VII
Bottom CMEG- 112.
Quality
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Job No. 340721 Chapter-III -25
Table 3.24
Quality characteristics of Seam-VII Bottom in Gobin dpur North Block No. of BH considered = 27 Thickness Range
1.00m (CMEG-110) to 4.38m (CMEG-65)
Proximate Analysis (as analysed basis) Ex band bcs In band M% 0.6 – 3.3 0.5 – 3.0 0.5 – 2.4 A% 24.3 – 39.2 27.4– 44.0 26.8-58.6 VM% 17.8-22.3 17.0-21.5 17.8-21.5 CV(K Cal/Kg) 5110-6930 4280 - 5610 2860 - 5610 UHV(K Cal/Kg)
5106-3904 4746-2704 4525-2048
W-III – UG W-III – UG W-III – UG
Grade (a)Coking ---
Range General
(W-III-W-IV)
(W-IV)
(UG)
C-E D - F D-UG
Grade b)Non-Coking
Range
General (D) (D-E) (E-F)
Ultimate Analysis Unit coal basis As analysed
basis Ex band bcs I VM% - 20.9-28.7 22.9– 29.9 22.9-29.9 C% 57.87-58.96 88.12-88.39 H% 3.29-3.37 5.03-5.04 N% 0.92-1.15 S% 0.31-0.33 P% 0.123-0.126 CO2% 0.16-0.57 CV(K Cal/Kg) 5610-6930 7717-8598 7717-8598 7916-8598 Other Tests CI - CT F-D SI 1 Ash fusion Temp deg C IDT HT FT >1400 >1400 >1400
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-III -26
Grade: The In-band coking grade of the Seam-VII Top is ‘Ungraded’ to Washery
grade-III while the same as per non-coking norms is ‘Ungraded’ to D.
3.4.8 Seam-VI
Seam-VI occurs 0.22m (CMEG -50) to 5.93m (CMEG-101) below Seam VII
Bottom and 57.58m (CMEG -109) to 48.70m (CMEG-52) above underlying Seam-
V. The Seam-VI is almost merged with Seam-VII-Bottom in borehole CMEG-36
and 50 with a parting of grey shale measuring less than 1m.
The details of borehole intersections of this seam is given below:
Table 3.25
Details of borehole intersections of Seam-VI in Gobindpur North Block
Floor depth below G.L.
(a) Shallowest 8.60m (CMEG-121)
1
(b) Deepest 138.90m (CMEG-99)
F.R.L
(a)Highest 278.04m (CMEG-48)
2
(b)Lowest 118.77m (CMEG-99)
No. of BH intersections 23
(a) Unfaulted 15
(b) Faulted / Partially Faulted 4 / -
3
c) Burnt 3
d)Incrop 1
Incrop
Due to existence of very thin parting between them, the incrops of Seam-VI and
Seam-VII Bottom run in close proximity to each other and are available in an E-W
strike on ground.
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Job No. 340721 Chapter-III -27
Thickness:
The thickness of Seam-VII Bottom varies from 0.40m (CMEG-46 to 3.26m
(CMEG-111). In the west central part, around BH no CMEG-46, 101,65, 42 and 99
the seam thickness has been reduced to 1m or less due to development of
carbonaceous bands. But generally the thickness remains around 2 to3m in most
of the area.
Roof and floor
The immediate roof of Seam-VII Bottom is generally shaly sandstone or fine to
medium grained sandstone. The immediate floor is generally sandy shale, shaly
sandstone and occasionally fine grained sandstone.
Dirt Bands:
Table 3.26
Range of Dirt Bands in Seam-VI
Details Minimum Bh No
CMEG-
Maximum Bh No
CMEG-
Nos
considered
Seam
Thickness
i)Including
dirt bands
+NCB
0.45 36 3.26 111 21
ii)Including
bands(I-
100)
0.45 36 3.26 111 21
iii)Ex band 0.45 36 3.26 111 21
2)a..Dirt bands <1m NIL in 13 boreholes out of 28 boreholes
A) Number nil 36,37,41,43,46,103,109,115 3 52 15
B)
Thickness
1)Individual 0.09 107 0.92 63 15
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Job No. 340721 Chapter-III -28
2)Aggregate 0.14 123 0.72 52 15
2)b..Dirt bands >1m
A) Number nil nil nil nil 15
B)
Thickness
nil
1)Individual nil nil nil nil 15
2)Aggregate nil nil nil nil 15
3) Non-combustible Bands
A) Number 1 54,111 1 54,111 15
B) Thickness
1)Individual 0.05 54 0.06 111 15
2)Aggregate 0.05 54 0.06 111 15
Note: NCB=non combustible bands
Effect of Igneous Intrusive:
The seam is completely burnt in and around CMEG-42, 65 and 112.
Quality
Table 3.27
Quality characteristics of Seam-VI in Gobindpur North Block
No. of BH considered = 21 Thickness Range
0.40m (CMEG-46) to 3.26m (CMEG-111)
Proximate Analysis (as analysed basis) Ex band bcs In band M% 0.9 – 1.3 0.6 – 1.3 0.5 – 1.3 A% 28.3 – 30.7 29.5– 43.8 24.2-47.8 VM% 19.4 15.8-20.0 15.2-20.4 CV(K Cal/Kg) 5760 4250 - 5760 4110-4950 UHV(K Cal/Kg)
3040-4870 2745-4691 2193-4691
W-IV UG UG
Grade (a)Coking ---
Range General
(W-IV)
(UG)
(UG)
Grade
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Job No. 340721 Chapter-III -29
D E-G D-F
b)Non-Coking Range
General (D) (E-F) (E-F) Ultimate Analysis
Unit coal basis As analysed basis Ex band bcs I
VM% - 24.4-27.1 22.4– 28.3 21.5-28.3 C% - 88.12-88.39 H% - 5.03-5.04 N% - S% - P% - CO2% - CV(K Cal/Kg) - 8655 8336-9236 8283-8812 Other Tests CI - CT - SI - Ash fusion Temp deg C IDT HT FT >1400 >1400 >1400
Grade: The In-band coking grade of the Seam-VI is ‘Ungraded’ while the same
as per non-coking norms is E to F.
3.5.1 Geological coal reserves
The total geological reserves of coal in larger Govindpur block (as per March 1993
G.R. of CMPDI) are tabulated below:
Table 3.28
Seam–wise & Sector wise net ‘proved’ coal reserves
in Gobindpur block (as per GR, 1993)
Seam Proved Indicated Total Jarangdih 9.282 9.282 Jarangdih New 5.627 5.627 Jarangdih 6' 3.147 3.147 Jarangdih 'A' 2.530 2.530
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Job No. 340721 Chapter-III -30
Seam Proved Indicated Total Sawang 'C' 5.815 5.815 Kathara 7.636 3.814 11.450 Uchitdih 'A' 1.909 1.053 2.962 Kargali Top 22.119 6.127 28.246 Kargali Bot 19.109 9.718 28.827 Bermo 44.250 8.529 52.779 Karo-XI 4.545 4.190 8.735 Karo-X 18.233 16.762 34.995 Karo-IX 4.954 4.277 9.231 Karo-VIII 50.772 37.422 88.194 Karo-VII/VI 5.739 6.107 11.846 Karo-IV 5.478 6.500 11.978 Karo-III 4.968 6.000 10.968
Total 216.113 110.499 326.612
The area of that block was much larger than ‘Gobindpur Phase-II OC’ and
extended from incrop of Seam-III in the north, to the Borrea Fault and Railway line
in the south, and from Borrea Fault in the west, to Govindpur - Pichri Fault in the
East. The coal seams covered in the GR of 1993, included, in addition to Karo
group of seams, upper seams from Bermo to Jarangdih seams also.
In the year 2001 another geological report of Gobindpur North block,
encompassing only Karo Group of Seams and covering area lying to the north of
Bermo Seam incrop - upto Seam-III incrop in the north, was prepared by CMPDI.
In that area - only Seams XI, X, IX, VIII, VII-Top & VII Bottom and VI were found to
be having quarriable potentiality while the lower seams being thin and occurring
after thick parting interval were not considered for OC mining. The Sector wise net
in situ quarriable reserve in the entire Gobindpur North block (Sectors- A, B & C)
have been summarised below.
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Job No. 340721 Chapter-III -31
Table 3.29
Seam–wise & Sector wise net ‘proved’ coal reserves
in Gobindpur North block (G.R. 2001)
(Figures in Tonnes)
Av.Grade SEAMS SECT-A SECT-B SECT-C
SEAM
TOTAL Coking Non Coking
XI 73440 378754 298467 750661 W-IV E
X 363168 1499427 1556928 3419523 W-IV D
IX 118296 311447 372960 802703 W-IV D
VIII 2274192 4963433 4495212 11732837 Ungraded F
VII 757789 1986057 1523060 4266906 W-III E
VI 379195 637740 776628 1793563 Ungraded F
TOTAL 3966080 9,776,858 9,023,255 22766193 Ungraded
The limits of the various sectors in the GR are defined as follows:
Sector-A: Area lying between eastern bank of Konar River in the west,
fault F7 in the east, Seam VI incrop in the north and incrop of Bermo Seam
in the south. This sector is highly disturbed by a number of sets of faults .
The seam incrops are also not in continuity with adjoining Sector -B of
OC and have shifted to a considerable distance southward where coal has
already been quarried out . Therefore this sector has not been included in
the present OC.
Sector-B: Area lying between fault F7 in the west and F11in the east,
Seam VI incrop in the north and incrop of Bermo Seam in the south.
Sector-C: Area lying between faults F11 in the west and F13 in the east,
Seam VI incrop in the north and incrop of Bermo Seam in the south.
Sector-D: Area lying between faults F13 in the west and F16 in the east,
Seam VI incrop in the north and incrop of Bermo Seam in the south. As the
sector has insufficient strike length due to presence of fault s, and the
coal reserves belong to “indicated “ category due to paucity of boreholes
data, this sector also could not be included in the present OC .
Sector-E: Area south of Bermo Seam incrop in down to 200m depth line
on Seam-VI floor in the south, bounded on the east by Montico Nala and on
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Job No. 340721 Chapter-III -32
the west by Borrea Fault (F7-F7). This is a sector not covered in the
geological report of Gobindpur North block (2001), and has now been
defined for including additional reserves south of the original limits of
Gobindpur North block.
Thus only sectors B, C and E have been considered in the PR of
present OC.
The in-situ reserves in the Govindpur Phase-II OC Block are summarised
below:
Table 3.30
Seamwise & Sector wise net ‘proved’ coal reserves in Gobindpur Phase-II OC block
(Fig in Tonnes)
Av.Grade Seam SECT-B SECT-C SECT-E Total
Coking Non Coking
XI 378754 298467 497120 1174341 W-IV E
X 1499427 1556928 2081300 5137655 W-IV D
IX 311447 372960 521820 1206227 W-IV D
VIII 4963433 4495212 5903820 15362465 Ungraded F
VII 1986057 1523060 938340 4447457 W-III E
VI 637740 776628 879840 2294208 Ungraded F
TOTAL 9,776,858 9,023,255 10,822,240 29,622,353 E Note: 1. The figures are as per “Geological report on Gobindpur North block, East Bokaro
Coalfield, CMPDI” in 2001. 2. Additional OC reserves of 526082 te are present in part coal/part jhama zone in
sector –B in Seam-VIII (454,784 te) and Seam-VI (71,298 te).
3. A deduction of 10% has been made from the gross reserves to provide for
geological loss for unforeseen factors like occurrence of minor faults / burning and
thinning.
Out of a total of 29.622 mt in the OC, Sector-B has 9.777mt (33%), while Sector-C
& D have 9.023 mt (30%) & 10.822 mt (37%) of total coal reserves. The Seam
Karo-VIII constitutes 52%, followed by Seam-X (17%), VII (15%), VI (8%), IX (4%)
and XI (4%) respectively.
The quarried out area (as was existing in 2001) has been fully excluded while
calculating the reserves for the OC block.
Chapter -IV-1
CHAPTER IV
4.0 MARKETABILITY AND LINKAGE
4.1 Demand
Liberalisation of power sector by Govt. of India has generated wide spread
interests for Private and Public sector investments in different industries. As
such, there is an appreciable increase in the number of upcoming new industries
in both Private and Public Sectors. This has resulted in a sharp increase in the
demand of coal in CCL. The Govindpur Ph-II OCP (1.2MTY) is therefore,
proposed with a view to fulfil the above indicated growth in demand.
4.2 Availability
The availability and demand from CCL is given in Table-4.0 below:
Table No. 4.0
COAL DEMAND AND AVAILABILITY OF CCL
(Basis : Chairman CIL's letter to S ecy. Coal in Sep '09)
Sl No. Coal Consuming Sectors Coal Demand (MT)
2009-10 2010-11 2011-12 2016-17
A. TPPs
1 Existing TPSs (that came
up prior to XIth Plan) 29.21 29.21 29.21 29.21
2 XI Plan TPSs (including
IPPs) 11.23 15.32 27.35 49.17
TOTAL for TPPs 40.44 44.53 56.56 78.38
B. Captive Power Plants (CPPs) #
4.03 4.03 4.03 4.03 TOTAL COMMITMENT FOR POWER
SECTOR 44.47 48.56 60.59 82.41
C. Cement Plant # 0.42 0.42 0.42 0.42
D. Steel* 3.60 3.96 4.35 9.25
E. Fertilizer 1.00 1.00 1.00 1.00
F. Sponge Iron # 2.63 2.63 2.63 2.63
G. E-Auction @10% of production 4.60 5.00 5.50 8.30
Chapter -IV-2
H. Others i.e, CPSU, State Agencies, Bricks etc. 2.77 2.77 2.77 2.77
TOTAL Commitment on CCL 59.49 64.34 77.26 106.78
PRODUCTION 46.10 50.00 55.00 83.00
GAP -13.00 -14.00 -22.00 -24.00
The availability figures till end of XIth plan period (2011-12), as shown in the
above table, have been obtained from CCL. The gap in demand and availability
of coal justifies implementation of this project.
4.3 Linkage
Basket Linkage is proposed for the coal from this mine.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -1
CHAPTER – V
5.0 MAIN TECHNICAL DECISIONS FOR THE QUARRY
5.1 PRESENT STATUS
This proposal has been prepared as a new project . This report proposes to
exploit the upper Karo Group of seams (Seam VI to XI) based on the “Geological
Report on Coal Exploration Govindpur North Block, East Bokaro Coalfield”
prepared in Dec 2001 and the area south of Bermo Seam incrop upto 200m
depth line on Seam-VI floor in the south, bounded on the east by Mantico Nalla
and on the west by Borrea Fault (F7-F7). This is a sector not covered in the
geological report of Gobindpur North block (2001), and has now been defined for
including additional reserves south of the original limits of Gobindpur North block.
5.2 Boundaries of Mining Block
The Plan showing the quarry boundary is given vide Drg. No. R3-OCM-000456.
The mine boundary has been fixed as follows: -
Northern Boundary
The northern floor boundary has been fixed along the in-crop of Seam VI.
Southern Boundary
The southern floor boundary has been fixed along 180m-depth line on the floor of
Seam-VI.
Eastern Boundary
The eastern floor boundary has been fixed leaving a surface barrier of 50m
against existing course of Montico Nalla at the quarry surface.
Western Boundary
The western floor boundary has been fixed along the major fault F7, which has a
throw of about 50 - 70m. The area on the west of this fault is the up thrown side
and is highly geologically disturbed being dissected by number of faults. This
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -2
area has already been worked in patches. And as such, in this PR the area on
the west of the fault F7 has not been considered for working.
5.3 Rated Capacity
The rated capacity of the mine has been determined as 1.2 MTY on the basis of
the following factors:
a) Coal reserves and stripping ratio and
b) Mining & Technical capacity of the mine.
The quarry boundary has been maximized to the extent possible and mining upto
Seam VI has been considered. The extractable reserve has been estimated as
19.53 MT of coal. The life of the mine has been estimated as 20 years. There is
further coal reserve available on the dip side in the south. However, to exploit this
reserve Mantico Nalla flowing north to south on the eastern side has to be
diverted. Without diverting this Nalla the working area becomes very narrow and
beyond a depth of 180m, it will be very difficult to work in this narrow patch.
5.4 MINING RESERVES – VOLUME OF OBR – STRIPPING RAT IO
The mineable reserves have been estimated from the iso-chore plans of the
different seams. A loss of 10% has been taken as geological losses. In addition
to the geological losses, 15 cm of coal thickness has been left in the roof and the
floor of every seam to estimate the mineable reserves of coal.
The total volume of OBR has been estimated from the total iso-excavation plan.
The partings wise volume of OBR has been estimated from the cross-sections.
The total mineable reserves are estimated as 19.53 M.tes with a corresponding
volume of OBR of 28.66 Mm3 at an average stripping ratio of 1.47 m3/te. The
break-up of the seam wise coal reserves and total volume of OB/partings are
given in Table 5.1.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -3
Seam wise Mineable Reserve
Table No.5.1
Sl. No. Particulars Mineable Reserve
(MT)
A SEAMS
1 Seam VI 1.57
2 Seam VII B 2.00
3 Seam VII T 0.99
4 Seam VIII 9.77
5 Seam IX 0.80
6 Seam X 3.64
7 Seam XI 0.76
Total Mineable reserves 19.53
Total Net geological reserves 29.62
B Total Volume of Partings/OB 28.66
C Average Stripping Ratio 1.47
5.5 Geological & Mining Characteristics
The geological & mining characteristics of the proposed Govindpur Ph-II OCP
(1.2 MTY) mine are given in Table 5.2. Total 7 numbers of coal seams are
occurring within the quarriable area. Out of these, Seam VIII is the thickest and
most prominent seam, which contains dirt bands. The coal seams are dipping at
a gradient of 160-230 towards the south.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -4
Table No.5.2
Mining & Geological Characteristics of the Quarry
Sl.
No. Particulars Unit
THICKNESS
RANGE
Average
Value
1. Seam Thickness
A Seam VI M 2 - 3 2.5
B Seam VII B “ 2 - 4 3
C Seam VII T “ 1 – 2 1.5
D Seam VIII “ 22 – 23 22.5
E Seam IX “ 2 – 3 2.5
F Seam X “ 7 – 8 7.5
G Seam XI “ 1.7 – 2.5 2
2. Seam Gradient Degree 16 - 23 -
3. Specific Gravity of the seams Te/m3 1.62
4. Excavation Category of coal Assumed III
5. Parting/Overburden Thickness
A Seam VI and Seam VIIB M 0.2 – 6 3
B Seam VIIB and Seam VIIT “ 0.3 – 3.8 2
C Seam VIIT and Seam VIII “ 10.2 – 14.6 12
D Seam VIII and Seam IX “ 9.3 – 31.5 20
E Seam IX and Seam X “ 0.4 – 5.9 3
F Seam X and Seam XI “ 4.5 – 8 6
6. Excavation Category of OB Assumed 50% Cat.III+50% Cat (IV)
7. OB Volume weight Te/m3 2.40 (approx.)
8. Strike length of the quarry Km 1.50
9. Maximum depth of the quarry M 180
10. Quarry surface area Ha. 76.42
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -5
Mining and Technical Capabilities :
The targeted capacity of 1.2 MTY is proposed to be achieved by 4th year of
mining operation.
The time to achieve target production has been fixed on the basis of:
a) Estimated schedule of delivery and erection of main HEMM - capacity
build up.
b) Time required for opening of strike length.
c) Construction period required for coal handling plant, evacuation system
and other infrastructure development.
d) Land acquisition.
5.6 Design Criteria
The following design criteria have been adopted for the mining operation of the
quarry: -
(i) No. Of annual working days : 330
(ii) No. Of daily shifts : 3
(iii) Duration of each shift : 8 hours.
Annual 330 working days has been calculated considering following assumptions:
Calendar days per annum - 365
Less- Public Holidays - (-) 8
Unscheduled delays - (-) 5
Bad weather effect - (-) 22
Working days per annum with
Sunday working: - 330
The opencast mine would be worked on the above 3 shift/day basis and 7
days/week schedule and the number of working days / year are adopted as 330,
considering annual public holidays, unscheduled delays and bad weather effect
particularly in rainy season.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -6
5.7 Life of the Mine
For the rated output of 1.2 MTY of ROM coal and with the mineable reserves of
19.53 MT the life of the opencast mine is estimated as 20 years. The mine will
achieve the targeted production in the 4th year of operation.
5.8 Opening of the Quarry
For the quarry two openings have been proposed. One opening has been
proposed in the northwest, from the incrop of Seam VI near borehole no CMEG
100 at an FRL of +243. To develop the full strike length of the mine for the gainful
deployment of HEMM and to achieve the targeted production earlier, another
quarry opening has been proposed in the northeast. Here also the opening is
from the incrop of Seam VI near fault F11 and an FRL of +280m. This opening
will also facilitate the early starting of internal dump on the eastern part of the
quarry, upto fault F11.
5.9 Mining System
The mining and geological conditions of the mine are as follows: -
(a) Multiple seams to be worked
(b) Steep gradient of 16 – 23 degree of the coal seams.
(c) Variable thickness of OB/Partings.
Considering the above mining and geological conditions, shovel-dumper mining
system with horizontal slicing has been envisaged for working this OC mine.
5.10 Calendar Programme of Excavation
The Summarised Calendar Programme of Excavation is given in Table No.5.3
which has been formulated based on adopted sequence of opencast mine field
development at optimum conditions of mining operations for the entire life of
mine. The total mineable reserves have been estimated as 19.53 MT
corresponding to a volume of OBR of 28.66 MM3 at an average stripping ratio of
1.47 m3/te. The rated output of 1.2 MTY would be achieved in 4th year after the
sanctioning of the PR. The production built-up would be for a period of 4 years.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -7
As may be seen in the table, the peak OB workload is 2.10 Mm3 in the 7th year of
quarry operation.
The detailed calendar program is given in Table 5.4.
Summarised Calendar Programme of Excavation
Table-5.3
Year Coal OB S.R.
1 0.00 0.90 --
2 0.40 1.22 3.05
3 0.80 1.57 1.97
4 1.20 1.88 1.57
5 1.20 1.88 1.57
6 1.20 1.87 1.56
7 1.20 2.10 1.75
8 1.20 1.87 1.56
9 1.20 1.83 1.53
10 1.20 1.73 1.44
11 1.20 1.55 1.29
12 1.20 1.49 1.24
13 1.20 1.39 1.16
14 1.20 1.39 1.16
15 1.20 1.39 1.16
16 1.20 1.39 1.16
17 1.00 1.14 1.14
18 0.75 0.89 1.19
19 0.60 0.71 1.19
20 0.38 0.46 1.19
TOTAL 19.53 28.66 1.47
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -8
DETAILED CALENDAR PROGRAMME OF EXCAVATION Table No.5.4
YEAR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total
OB 0.00 0.68 1.46 1.84 1.82 1.90 2.63 2.20 1.92 1.92 1.67 1.46 1.46 1.46 1.46 1.46 1.22 0.91 0.73 0.47 28.66
TOP OB 0.00 0.41 0.59 0.41 0.48 0.50 0.54 0.57 0.59 0.59 0.41 0.27 0.27 0.27 0.27 0.27 0.23 0.17 0.14 0.09 7.06
XI-X 0.00 0.00 0.00 0.00 0.09 0.09 0.00 0.09 0.14 0.14 0.13 0.13 0.13 0.13 0.13 0.13 0.10 0.08 0.06 0.04 1.60
X-IX 0.00 0.00 0.00 0.00 0.02 0.02 0.01 0.05 0.08 0.08 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0.04 0.03 0.02 0.81
IX-VIII 0.00 0.00 0.06 0.40 0.69 0.74 1.28 0.88 0.61 0.61 0.55 0.50 0.50 0.50 0.50 0.50 0.42 0.31 0.25 0.16 9.47
VIII-VIIT 0.00 0.13 0.54 0.80 0.44 0.44 0.59 0.45 0.36 0.36 0.36 0.36 0.36 0.36 0.36 0.36 0.30 0.23 0.18 0.12 7.12
VIIT-VIIB 0.00 0.05 0.08 0.07 0.05 0.05 0.08 0.07 0.06 0.06 0.05 0.05 0.05 0.05 0.05 0.05 0.04 0.03 0.02 0.01 0.95
VIIB-VI 0.00 0.09 0.19 0.16 0.06 0.06 0.12 0.10 0.08 0.08 0.08 0.09 0.09 0.09 0.09 0.09 0.07 0.05 0.04 0.03 1.65
S.R. - 3.05 1.97 1.57 1.57 1.56 1.75 1.56 1.53 1.44 1.29 1.24 1.16 1.16 1.16 1.16 1.14 1.19 1.19 1.19 1.47
COAL
YEAR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total
COAL 0.00 0.40 0.80 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.00 0.75 0.60 0.38 19.53
XI 0.00 0.00 0.00 0.00 0.04 0.04 0.00 0.03 0.05 0.05 0.06 0.07 0.07 0.07 0.07 0.07 0.06 0.04 0.03 0.02 0.76
X 0.00 0.00 0.00 0.00 0.18 0.18 0.02 0.17 0.26 0.26 0.29 0.31 0.31 0.31 0.31 0.31 0.26 0.20 0.16 0.10 3.64
IX 0.00 0.00 0.00 0.00 0.04 0.04 0.01 0.04 0.06 0.06 0.06 0.07 0.07 0.07 0.07 0.07 0.06 0.04 0.03 0.02 0.80
VIII 0.00 0.03 0.25 0.70 0.72 0.72 0.77 0.64 0.56 0.56 0.57 0.58 0.58 0.58 0.58 0.58 0.49 0.36 0.29 0.19 9.77
VIIT 0.00 0.08 0.11 0.10 0.05 0.05 0.09 0.07 0.06 0.06 0.05 0.04 0.04 0.04 0.04 0.04 0.03 0.02 0.02 0.01 0.99
VIIB 0.00 0.15 0.23 0.22 0.10 0.10 0.18 0.14 0.12 0.12 0.10 0.08 0.08 0.08 0.08 0.08 0.06 0.05 0.04 0.02 2.00
VI 0.00 0.14 0.21 0.18 0.07 0.07 0.13 0.11 0.09 0.09 0.07 0.05 0.05 0.05 0.05 0.05 0.04 0.03 0.03 0.02 1.57
OB
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -9
5.11 Coal Winning and OB removal
OB Removal
To remove the overburden, two 4 cum diesel hydraulic shovel with 35T Rear
Dumpers have been proposed. The peak OB workload is 2.10 Mm3.
Coal Winning
4 cum diesel hydraulic shovel with 35T Rear Dumpers have been proposed for
mining of 1.2 MTY of coal. The dumpers from the face to the CHP installed on the
surface would transport the coal.
Some major system parameters for both coal winning & OB removal are given below: -
1. Mining Benches
a) Maximum Bench Height
• 4 Cum Elec Hyd shovel bench - 8-10m
b) Minimum Bench Width
Working Bench Width for 4 cum Elec Hyd Shovel - 40m
Non-working Bench width for 4 cum Elec Hyd Shovel - 25m
2. Width of the permanent haul road - 30 m.
3. Width of the temporary transport ramp - 20 m.
4. Usual height of the spoil dump bench - 30 m.
5. Bench Slope (working)
O.B. bench - 700
Coal bench - 700
Dump bench - 370
Overall pit slope - 370.
5.12 Annual Productivity of Main HEMM
The annual productivity of shovels and dumpers have been calculated on the
basis of the following:
(a) Excavation Category:
Coal : Cat. III
OB : 50% Cat. III + 50% Cat. IV.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -10
The materials having compressive strength between 125 to 250 kg/cm2 is
classified as Cat. III and between 250 to 1250 Kg/cm2 as Cat. IV
(b) Standard Utilization of Shift Hours
For Elect. Hyd. Shovel: 61%
For Dumpers 67%
The main mining and transport equipment would be operating on 3 shifts/day and
7 days/week operating schedule. The number of operating days/year has been
adopted as 330.
Based on the above operating conditions, the estimated annual productivity of the
proposed shovels as per the prevalent norms is given below: -
The requirement of dumpers for the transportation of OB and coal has been
calculated based on (a) annual workload (b) annual productivity of dumpers (c)
hauling distanced from the face to the receiving pit/dump site etc. (Table no.5.6).
The annual productivity of dumpers for a lead of 1.0 to 4.5 km is given in
following table: -
Annual Productivity of Dumpers (in M cum) Lead
(in km) 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
For OBR 35T Dumper +4 m3 Elec. Hyd Shovel
0.1879 0.1571 0.1389 0.1268 0.1146 0.1054 0.0980 0.0921
For Coal 35T Dumper
+4 m3 Hyd
Shovel
0.2245 0.1888 0.1674 0.1532 0.1387 0.1276 0.1189 0.1119
5.13 Equipment configuration
The detailed list of HEMM proposed for Govindpur Ph-II OCP 1.2 MTY is given in
Table 5.5 below:
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -11
YEARWISE POPULATION OF HEMM Table 5.5
Year 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Coal
Hyd. Shovel 4 Cum 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Rear Dumpers 35T 2 3 5 5 5 5 5 5 5 5 5 5 5 5 5 4 3 3 2
Drill 160 mm 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Dozer 410 HP 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
OB
Hyd. Shovel 4 Cum 1 1 1 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1
Rear Dumpers 35T 8 10 13 16 16 17 17 17 17 17 15 15 15 14 14 14 11 9 7 5
Drill 160 mm 1 1 1 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1
Dozer 410 HP 1 1 1 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1
Common
Hyd. Shovel (with backhoe)
1.2 Cum 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Wagon Drill (Diesel)
100-120mm
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Grader 280HP 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
RT crane 20T 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Mobile Crane 8T 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Front End Loader 5-6 Cum 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Tyre Handler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Water Sprinkler (wide spray system)
28 KL 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Wheel Dozer 460 HP 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Fuel trucks 16KL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Fire Truck 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Reclamation
F E Loader 5-6Cum 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Water Sprinkler (wide spray system)
28 KL 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Dozer 410 HP 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -12
5.14 Drilling and Blasting Operations
160mm diameter drills are envisaged for drilling in Top OB / partings as well as in
coal seams.
5.15 Spoil Dump
The final stage dump plan showing external dump has been given vide Drg. No.
R3-OCM-000457.
As the gradient of the quarry is very steep, internal dumping could not be
proposed during the quarry operation. However, an area in the east of the
proposed quarry has been identified for internal dumping (marked as Internal
Dump ‘B’) after its exhaustion in the 4th year. The total volume of O.B to be
removed is estimated as 28.66 M.cum. 24.00 M.cum of O.B is proposed to be
placed at the external OB dump ‘A’ and the rest OB of 4.66 M cum is to be placed
as internal dump ‘B’. In the absence of external dump nearby, the external OB
dump ‘A’ has been earmarked in the North of Konar River in the north-western
side of the proposed OC. The same is marked as ‘Open scrub’ in the Survey of
India Topo sheet no 73E/13. The top RL of the proposed external dump ‘A’ is
+300m. The area of dump ‘A’ is 87.00 Ha. The internal dump B is proposed to be
done in the eastern part of the quarry, upto Fault F11. The top RL of internal
dump ‘B’ is +270m.
5.16 HFL Detail
The Konar River flowing from north to south in the west of the proposed quarry
has an HFL of 232.07m as on 01.10.1978. The surface RL ranges from 240m to
252m in the west. On the other hand north-south flowing Montico Nalla on the
east of the proposed quarry has an HFL of 234.95m as on 08.10.2003 whereas
the surface RL ranges from 240m to 252m in the east.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-V -13
5.17 Quarry Extension in dip side
The proposed PR has considered the reserves of Govindpur North block and the
area south of Bermo Seam incrop upto 180m-depth line on Seam-VI floor in the
south. Further extension of the project in the dip side is possible only after the
diversion of Mantico Nalla.
5.18 Product Mix Quality :
Although coal seam, parting and overburden just above coal seam will be worked
separately having separate benches, yet, there is a chance of deterioration in
quality of coal due to admixtures from roof and floor of the seam and by the
inclusion of bands within the seam. It is envisaged that the roof of the seam is
properly cleaned before blasting. A proper organization and strict quality control
measures are necessary to maintain the quality of coal at faces with all
precautions for quality control to reduce contamination at each contact point of
coal & OB or parting. The quality of coal has been worked out to be ‘Grade –E’
for the Project Report.
The Coal Quality may be improved further by adopting beneficiation measures.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VI -1
CHAPTER – VI
6.0 PUMPING AND DRAINAGE
6.1 The proposed PR of Govindpur OCP of CCL has been planned for targeted
production of 1.20 MTY. The planning of dewatering the mine has been done
in such a way that the working faces and haul roads in all quarries will remain
dry as far as possible. The layout of the quarry provides suitable gradient
along the quarry floors and the benches to facilitate self-drainage of water to
the sump at the lowest level of the quarry.
It is proposed to provide garland drain around the quarry boundary to arrest
water flowing into the mine from area beyond excavation.
During the heavy monsoon period, the work in lower most bench may have to
be stopped as it will not be possible to pump out the entire make of water on
the wettest day. Therefore, it is proposed to drown a part of the lower-most
bench, which would, then act as sump.
Water accumulated in the sump will be pumped out to the surface and
discharged into the nallah flowing outside the quarry and it will finally join to
nearby river Konar/ montico nallah. It is proposed to create a sedimentation
lagoon by constructing a series of check dams across the nallah. Water
overflowing the check dams would join Konar river. The lagoon will help to
separate the suspended solids from the mine water.
6.2 GENERAL CONSIDERATIONS
The pumping requirement has been calculated on the basis of the following
general considerations: -
- The geographical location of the opencast working.
- Meteorological data from the area concerning rainfalls.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VI -2
- Life of the mine and percentage probability of maximum rainfall in one
day during the life of the mine.
- Surface feature of the area surrounding the opencast working.
- Catchment area: Mined out area and area beyond excavation, and
dumped area.
- Run-off characteristics of the area.
- Depth of the quarry.
- Inflow to the quarry of UG & seepage water from Konar river.
- Desired location at the surface where the quarry water can be
discharged.
- Surface drainage system.
- Effective working hours – 20 hours/day for pumping calculation, but in
monsoon period pumping will be done round the clock.
- Proximity of Konar River.
6.3 BASIC DATA
The following data has been taken into consideration for arriving at the size of
the pumps: -
(a) Maximum depth of the mine : 180 m
(b) Percentage probability of maximum rainfall for entire mine life
: 5
(c) Probable maximum rainfall in a day in monsoon period from the probability curve
: 160 mm
(d) Run-off Co-efficient considered : (i) For mined out area = 0.9
: (ii) For area beyond excavation =0.1
: (iii) For internal dump Area =0.15
(e) Inflow of water to the quarry due to seepage and underground precipitation of River Konar.
: 20% of probable water accumulation due to rainfall & Konar river.
(f) The rainfall data has been adopted as recorded at
: IMD, Hazaribag
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VI -3
6.4 PUMPING CALCULATIONS
The calculation has been done taking into consideration the entire area of the
mine :-
(a) Approximate Area of excavation of the
mine quarry
: 0.764 Sq.Km.
(b) Approximate Area beyond excavation : 0.04 Sq.Km.
(c) Approximate dump Area in the quarries. : 0.17 Sq.Km.
(d) Probable water accumulation on the day of
maximum rainfall : 97972 Cum.
(e) Taking 20% for seepage and underground
precipitation the total water accumulation : 117566 Cum.
(f) Assuming 20 hours pumping per day,
pumping capacity required to pump out the
total make of water in six days. : 979 Cum./hour
(271 lps)
6.5 SELECTION OF PUMPS
On the basis of the calculation and considering standby pumping capacity, the
following pumps have been provided: -
Main Pump
Four nos. of 300 Cum / hr (82 lps) x 200 m head and two nos. of 150 Cum /
hr (42 lps) x 200 m head pumps have been provided. Out of which one no. of
each pump have been proposed as standby.
Two nos. of 150 Cum./hr x 100 m. head pumps have also been provided to
dewater the quarry during initial period of mining. These low head pumps may
also be used as intermediate stage pumping.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VI -4
Diesel Pumps
One number of 300 Cum/hr (82 lps) x 200 m head diesel pump has been
provided for emergency requirement.
Face Pumps and Slurry Pumps
Two Nos. of Face Pumps of 50 Cum/hr. (14 lps) x 45-60 m head and two no.
of Slurry Pump of 80 -150 Cum./ hr x 45 m head capacities have been
provided to pump out the water & slurry respectively accumulated near the
working faces.
6.6 SELECTION OF DELIVERY RANGES
The delivery ranges have been selected on the basis of the pumping capacity
during probable maximum rainfall and velocity of flow within the reasonable
limit. The delivery ranges for different capacity of pumps have been selected
for nominal diameters as 250mm, 200mm, 150mm and 100mm for the pumps
as per manufacturer’s standard.
6.7 ESTIMATED CAPITAL COST
The details of cost estimate along with the phased requirement have been
given in Appendix-A.3.3 of pumps, pipes and fittings.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -1
CHAPTER – VII
POWER SUPPLY, DISTRIBUTION, ILLUMINATION & COMMUNIC ATION
7.1 Power Requirement
The estimated connected loads; maximum demand and energy
consumption at optimum production level for the Govindpur Ph-II
Opencast Project for various options are as summarized below :-
S N Particulars Values
1 Connected Load (in kW) 2164 2 Load in Operation (in kW) 1522 3 Maximum Power Demand (in kVA) 918 4 Annual Energy consumption
(in kWhr x106) 7.27
5 Energy Consumption per tonne of coal production (in kWhr/te)
6.06
6 Cost of Energy per tonne of coal production (in Rs)
20.60
Table VII (i) indicates the detailed of power requirement and energy
consumption.
7.2 Existing Power distribution Arrangement
Presently the Govindpur Ph-II O/C Project substation (1x3 MVA, 11/3.3
kV) is receiving power at 11 kV through one no. independent single feeder
with ACSR Conductor from Kathara Regional Substation (1x10 MVA,
33/11 kV). This Substation is situated near Kathara o/c Project at a
distance of 12.0 Km (approx.).
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -2
7.3 Proposed Power Supply Arrangement
It is proposed to install another 2 MVA 11/3.3 kV Transformer for
additional electrical equipments and loads. Power shall be distributed from
this sub-station to various additional electrical equipment and load points.
7.4 Distribution and Utilisation Voltage
The distribution and utilization voltage for the project are summarized
below:-
(i) Shovel (4 M3) - 3.3 kV
(ii) Pumps as & above 110 kW - 3.3 kV
(iii) Pumps below 110 kW - 440 V
(iv) Workshop - 3.3 kV
(v) C.H.P. - 3.3 kV
(vi) Lighting (Mining Area) - 230 V (L- L)
(vii) Office - 230 V
7.5 System of Power Supply
For all the utilization voltages in the project, the system of power supply
shall be restricted earthed neutral.
7.6 Substation Capacity
To meet the power requirement of the project, substations with following
transformer capacity has been envisaged:-
(i) Substation: - 1x3 MVA; 11/3.3 kV (Existing)
1x2 MVA; 11/3.3 kV (Proposed)
The transformer capacity of existing Substation is 3 MVA, 11/3.3 kV. This
transformer will feed power to O.B, coal winning equipment (existing),
W/S, colony and other lighting loads. 2 MVA; 11/3.3 kV transformer is
proposed to be installed for feeding power to the additional load of HEMM
deployed for O.B. removal and coal winning and pumping loads.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -3
7.7 Quarry Distribution
Two Nos. of 3.3 kV O.H.T.L. with ACSR ‘DOG’ conductors are proposed to
be erected along the quarry edge of the project. Power to the electrical
equipment shall be tapped from O.H.T.L. through armoured PVC cable.
Sufficient provision of field switches have been made for feeding power to
4 m3 shovels at 3.3 kV. Also sufficient Nos. of field switches has been
provided for operation of H.T. pumps. For operation of L.T. Pumps at 440
Volt, 3.3 /0.440 kV, 630 kVA & 250 kVA step down transformers have
been provided.
7.8 Metering Arrangement
For the purpose of proper allocation of energy charge, 11 kV breaker as
well as 3.3 kV breakers are provided with metering facilities.
7.9 Quarry Illumination
Quarry illumination has been provided by groups of 400W & 250W, 250V
HPSV lamps mounted on 15m high towers, distributed along the quarry
edge. 5 kVA 3.3/0.230 Kv (L-L), lighting transformers have been provided
to feed power to lamps mounted on towers.
The haul road of the mine is proposed to be illuminated by High Pressure
Sodium Vapour lamps of 250 W mounted on poles of suitable height.
Adequate Nos. of 10 kVA, 3.3/0.230 Kv (L-L) lighting transformers have
been provided to facilitate haul road illumination. Provision have been
made in the estimate towards general and spoil dump illumination of the
mine and industrial areas.
Inverter type emergency lighting sets would be installed at important
locations for use at the time of general power supply failure. Over and
above, one no. of 10 kVA generator set has also been provided to meet
the emergency lighting requirement.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -4
7.10 Colony Illumination
The power supply to colony will remain unchanged. Provision of
Transformer, 440V OHTL and other electrical accessories has been made
for colony illumination & electrification both.
7.11 Power Supply to CHP
Proposal has been made to feed power to CHP at 3.3 KV from the project
Substation of the mine. The CHP will have its own incoming power
arrangement & distribution network.
7.12 Power Supply to Workshop
The project Substation will feed power to the workshop at 3.3 kV through
independent feeder. The Workshop-substation will step down the voltage
as per requirement and will feed its loads accordingly.
7.13 Improvement of Power Factor
Static capacitors with automatic p.f. correction relays have been provided
in the substation to improve the power factor to about 0.98 lagging.
Capacity of capacitors required to improve power factor to the above
stated value has been estimated as 508 kVAR for Option I & II and 424
kVAR for Option III at 3.3 kV.
7.14 Power Cost
Based on current DVC tariff, the annual power bill would be of the order of
Rs.247.24 lakhs at the rated coal production and OB transportation.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -5
7.15 Communication
For effective management of different production, service units and for
ensuring safety, the following communication facilities have been
envisaged for Govindpur Ph-II OCP (1.20 MTY).
- Surface Mine Communication System
- Internet with LAN
Surface Mine Communication
EPABX (ISDN) Exchange
In order to cater to the need of surface communication and Integrated
Service Digital network exchange of 50 lines, is proposed for facilitating
voice, data and video communication between various offices, residential
buildings and other strategic points within the mines, at higher speed. A
variety of devices can be connected to a single ISDN line including ISDN
Digital telephone, faxes modems and data transmission facility (E1
support) with LAN port.
ISDN exchange shall utilise pulse code modulation based on fully
distributed microporcessor and dual architecture. Exchange shall be based
on 32 bite processor having distributed control logic and switching control.
Important interfaces like analog PSTN interface and ISDN-BRI/RI shall be
provided. Audio conferencing, video conferencing, Data interface along
with CTS support shall be provided.
Integrated Services Digital Network Exchange provides the transmission
and reception of voice, data and video at higher speed of current modems.
A variety of devices can be connected to a single ISDN line, including
ISDN digital telephone, faxes and modems. Features as caller ID, advice
of charge, disk top conferencing, computer network connectivity and fast
Internet access are important advantages of ISDN exchange.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -6
Digital ISDN exchange with 50 lines and expandable upto 200 lines,
complete with PC based operator console with Pentium PC should be
provided.
The proposed EPABX exchange should have the following main features.
(i) The inbuilt Data switching facility will be used to transmit data
between two exchanges (the other exchange may not have ISDN
features) upto a speed of 19.2 Kbps.
(ii) The system will have DID (Direct Inward Dialing) and E&M two/four
wire facility.
(iii) The system will be interfaced with a broad variety of voice mail
system.
(iv) The system will support 3-way conferencing by allowing a third
party to enter in an existing call between stations/trunks.
(v) The system will continuously performs tests on itself and diagnoses
the results for maintenance reporting purposes.
(vi) The system will record automatically all the incoming and outgoing
calls in its temporary memory for billing, identification, cal type used and
it can be programmed also.
Accessories (i) Maintenance console with printer.
(ii) Float cum Battery charger
(iii) Battery back up.
(iv) Earthing.
External P&T Telephone Communication System
Besides the existing facilities of communication system of the project five
additional telephone sets with a EPABX interface have been provided for
P&T communication and access to public communication grid. These
telephone sets would be located in the residences and offices of key
personnel of the project, sub-station, workshop, etc.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -7
EDP System Facilities along LAN and Internet
It is proposed to deploy electronic data processing facilities for production
planning, control and project management etc. The system envisages to
play a key role in establishment of highly effective Data Base Management
System (DBMS) and Management Information System (MIS) etc.
The type of computer would be small business computer with broad
facilities and also have specific facilities to carry out:
- Pay rolls
- Financial accounting
- Inventory control
- Material management
- HEMM utilisation, breakdown analysis, idle time analysis etc.
- Production, despatch schedule and variances.
- Accident records etc.
- Resource utilisation & MISD.
Before initiating action for installation and implementation of the above
EDP system, a detailed system study would have to be carried out, with
clearly defined system objectives for identifying the data processing needs
and management information system needs of the project. Based on the
results and findings of the study, the system configuration and
specification have to be decided.
LAN Facility
A Local Area Network having 2 PCs in operation is proposed for this
project. The proposed network structure shall have 1 server for catering to
all the clients which shall be primarily connected with the server. This
server will serve as main file and print server. This server shall preferably
be Pentium D core 2 Duo based PC with 1 GB RAM, 120 GB HDD running
at 2.4 GHz min.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VII -8
The NOS will be Windows NT 4.0 with a required No. of user licenses.
The backbone cabling will be of fibre optic cable.
Internet Facility
An internet connection is proposed for the project to cater to the needs of
information gathering, file transfer and speedy correspondence by E-Mail.
The main internet link will be provided by VSNL/BSNL by means of leased
lines/dial-up modems.
The main server unit will be a Pentium D core 2 Duo based PC with 1 GB
RAM, 120 GB HDD running at 1.7 GHz minimum.
Software
The Network Operating Software will be Windows NT 4.0 with the required
No. of user license. For simultaneous Internet access from multiple client
MS Proxy Server 2.0 will be installed on top of Windows NT 4.0. In this
way a private local network along with Internet gateway can be built up.
7.16 Capital Investment for Plant & Machinery – Electric al
The total capital investment for this Project for electrical power supply,
distribution, illumination, colony lighting, communication and EDP facilities
etc. have been estimated and is given in Appendix-A.3.7.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VIII -1
CHAPTER – VIII
COAL HANDLING PLANT
8.0 Introduction
The PR of Govindpur Open cast Project is being prepared for a rated capacity of
1.20 MT of ROM coal / annum. The Coal Handling Plant for this project has been
envisaged to handle total production of coal from this mine.
The coal produced from the mine will be crushed and dispatched by tipping trucks
to nearby Washery / Rly. siding for onwards dispatch to customers.
For this size of coal handling plant other supporting infrastructures and suitable
repair facilities have also been provided.
The coal handling plant will operate on 3 shifts/day and 7 days per week basis
round the year like the mine.
8.1 Location
The plan showing the location of CHP is given in drg. No. R3/E&M/002357. As
can be seen from the plan the terrain is rugged. The CHP has been planned
keeping in view the rugged terrain.
The following factors have been considered in finalizing the location of CHP.
(a) Mine boundary
(b) Mine entry
(c) Topography
(d) Availability of free space
(e) Overall economy of the system
8.2 Basic Data
Details
8.2.1 Production capacity of the mine : 1.20 MTY
8.2.2 No. of working days / Year : 330
8.2.3 No. of working shifts/day : 3
8.2.4 Effective working hours/shift : 5
8.2.5 Feed size of coal in (mm) : (-) 1200
8.2.6 Product size of coal in (mm) : (-) 100
8.2.7 Consumer : Power Station & others
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VIII -2
8.2.8 Mode of despatch : By Tipping truck to near by
siding or to customer.
8.2.9 Loading hours/day : 365 days / Round the clock
8.3 System Capacity
System capacity of the CHP has been selected to match with the mine
production. Hence for the mines rated capacity 1.20 MTY, the overall
handling capacity of CHP has been envisaged to be 1.20 MTY.
8.4 Description of CHP 8.4.1 Receiving and Crushing of ROM Coal
A receiving platform of suitable size has been planned for the coal handling
plant. The maximum size of ROM coal received from the quarry will be of (-)
1200 mm size. The ROM coal will be discharged by the rear discharge
dumpers to the feeder breaker hopper and it will be crushed to (-) 200 mm
size. Two nos. of feeder breakers of capacity 500 tph each have been
provided out of which one will be in operation at a time and other will work as
standby.
8.4.2 Secondary Crushing
The crushed coal of (-) 200 mm size from the feeder breakers will be collected
by a short conveyor and fed into a roll crusher of 500 tph capacity for crushing
coal up to (-) 100 mm size.
8.4.3 Conveying System
The crushed coal from secondary crusher will be discharged onto an
elevating cum tripper conveyor for storage of crushed coal in overhead
hoppers. The width & capacity of conveyors have been considered as 1200
mm and 500 TPH capacity respectively.
8.4.4 Storage & Reclamation
Provision has been made to store crushed coal in overhead hoppers. The
crushed coal will be fed to overhead hoppers (4X200 Te Capacity) by a short
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VIII -3
elevating conveyor. There will be provision of ground stock of crushed coal
after the hoppers.
Below the hoppers motorized flap/hydraulic gate have been provided in each
of the hopper opening for loading the coal into truck.
8.4.5 Loading and Despatch
Each opening of the overhead hoppers will be fitted with motorized flap
/hydraulic gate which may be activated for loading as and when the tipping
truck will be positioned underneath the opening. Thereafter, coal will be
dispatched to nearby washery / Railway siding. Provision for weighment of
coal / trucks has also been envisaged.
8.4.6 Pollution control and Fire Fighting
Necessary arrangements have been provided for dust suppression and fire
fighting. Dust suppression arrangements have been provided at following
locations:
a) Receiving platform of Feeder Breakers
b) Discharge end of Feeder Breakers
c) Crusher top
d) Loading points.
Suitable nos. of dry type portable fire fighting equipment has been provided
to protect the plant from fire hazard.
8.4.7 Power supply, control and internal communicat ion
All the electrical equipment will be suitable for successful operation at the
ambient temperature prevailing at site. Power distribution system with all
protections and measuring facilities, Centralised sequence control, signaling
and instrumentation, Interlocking, Emergency stopping and Illumination etc.
have been provided.
8.4.8 Other Facilities
Two nos. 50 Te capacity truck weighbridges have been envisaged for
Weighment of trucks. Safety switches shall be provided like pull chord switch,
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-VIII -4
belt sway switch at suitable intervals along the length of conveyors for
stopping of conveyors and training of belts in case of emergency.
Description of CHP
A receiving platform of suitable size has been planned for the coal handling
plant. The maximum size of ROM coal received from the quarry will be of (-)
1200 mm size. The ROM coal will be discharged by the rear discharge
dumpers to the feeder breaker hopper and it will be crushed to (-) 200 mm
size. Two nos. of feeder breakers of capacity 500 tph each have been
provided out of which one will be in operation at a time and other will work as
standby.
Conveying System
The crushed coal (200 mm) will be discharged onto an elevating cum tripper
conveyor for storage of crushed coal in overhead hoppers. The width &
capacity of conveyors have been considered as 1200 mm and 500 TPH
respectively.
Storage, Reclamation & Loading
Storage, Reclamation, Loading and other facilities have been envisaged as
described above for variant –I & II.
8.5 Estimated Capital Cost
The estimated capital expenditure for the coal handling plant as envisaged
for handling the capacity of 1.20 MTY coal is given in the Appendix: A.3.4.0.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-IX -1
CHAPTER – IX
RAILWAY SIDING
9.0 Introduction
The proposed Govindpur opencast project in East Bokaro Coalfield has been
planned for targeted production of 1.20 MTY of coal. Railway siding is not
available nearby to dispatch the proposed production of coal from this mine.
As such a railway siding has been proposed at the abandoned Pipradih
railway siding of CCL for dispatch of coal from this Project. Provision for
loading of coal through wharf wall loading with pay-loader system at the
proposed siding for dispatch of coal produced from Govindpur Ph-II OCP.
9.1 Yard Layout
The yard has been planned for a full rake siding of 58 Box N wagon with
wharf wall facilities (one empty receiving line only) suitable for semi-
mechanised loading.
9.2 Take Off-Point
It is assumed that the proposed railway siding will be taken off from the
Gomio Railway Station of main Gomoh-Barkakana rail line. The length of the
proposed railway siding will be about 0.8 Km to accommodate a rake of 58
‘N’ wagons.
9.3 Characteristic features of the proposed Railway siding are as follows:
(a) One empty receiving line for a full rake length of 58 box N wagons.
(b) Wharf wall loading of wagons.
(c) Environmental measures (dust suppression, fire fighting, plantation
etc.)
(d) Weighment of wagons / rakes.
9.4 Estimated Cost of the Railway Siding
The details of cost estimate of proposed Railway Siding including Yard
portion has been given in Appendix-A.5.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -1
CHAPTER – X
WORKSHOP & STORE
10.0 Introduction
Govindpur PH-II OCP is a new mine of Central Coalfields Limited. This
project report has been prepared for a targeted production of 1.20 MTY.
So, a new unit workshop has been proposed. This unit workshop is
envisaged to cater the need of daily maintenance, schedule maintenance,
lubrication, routine inspection, minor/medium repair and replacement of
parts/sub-assemblies of HEMM such as- Dumpers, Dozers, Shovels, and
Drills etc. Minor repair of assemblies and sub-assemblies of pumps, CHP
equipment, electricals etc. deployed in the project will also be performed
in this workshop.
Any major overhaul of equipment and manufacturing of spares on large
scale are beyond the scope of this workshop. These works will be carried
out in Regional Repair Shop or Central Workshop, Barkakana.
This unit workshop will have two parts – Excavation and E&M workshops.
Apart from this, Project store and other common facilities have been
provided. A schematic layout plan of the workshop is shown in drawing
No. R 3 E&M 002378.
10.1 Excavation Workshop
This part of workshop will have the facilities for attending to schedule
maintenance, minor and medium repair or replacement of parts/sub-
assemblies of face and transport equipment such as – Shovels, Drills,
Dozers, Dumpers, Graders, Crane and other miscellaneous equipment
used for mining operation.
All dumpers and dozers coming to workshop for their daily as well as
schedule maintenance will be first washed at the washing stations
provided in the workshop and then brought to the respective maintenance
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -2
shop like daily maintenance shop and schedule maintenance (lubrication
& Inspection) shop as per their schedule.
In daily maintenance shop, the equipment will be checked for lubrication,
tyre inflation, oil levels etc.
The equipment for scheduled preventive maintenance as per
recommended schedules of the manufacturers will be directed to
schedule maintenance shop where their complete lubrication will be taken
care along with diagnosis of their technical state. After evaluation of the
condition, they will be sent to the Dumper Repair shop for medium repair
and/or to Regional Repair Shop, Central Workshop for major repairs. The
equipment, which experience incidental problem in the field and require
medium repair will also be directed to Dumper/Dozer repair shop.
Maintenance of Shovels, drills and minor repairs will be carried out at the
site. The components/assemblies requiring further repair will be dis-
assembled from the machine and the dis-assembled components will be
brought to the Repair shop. In case of major repair, these will be sent to
central workshop.
Broadly this workshop will have the following functional shops:
i) Machine shop
ii) Electrical Repair shop
iii) Smithy shop
iv) Dumper Repair shop
v) Dumper Daily Maintenance shop
vi) Schedule Maintenance (Inspection and lubrication) shop
vii) Dozer Repair shop
viii) Welding Shop
ix) Washing Station
x) Stores & common facilities
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -3
i) Machine shop
This shop will have the necessary machine tools for restoration of
worn-out parts and manufacture of small non-complicated spare
parts, which are in short supply and required for repair of HEMM.
ii) Electrical Repair shop
This shop will have the facilities for carrying out the minor and
medium repairs of the electrical components of the mining
equipment. The repair facilities have been limited to the parts
replacement and repair of self-starter, Dynamo, Battery charging
etc.
iii) Smithy shop
This shop will deal with the manufacture of small hand forging
components required for the repair need of HEMM equipment. It is
located in one side of the workshop.
iv) Dumper Repair shop
This shop will cater to the need of repair/replacement of
parts/components of the dumpers needing repair after their proper
inspection & diagnosis of defects in the Schedule Maintenance
shop.
The dumpers, which experience incidental problem in the field and
require minor & medium repair will also be attended in this shop.
All dumpers coming for repair must be first washed at the washing
station before entering this shop. There is a common 15/5T floor
operated EOT crane, which will serve dumper repair shop as well
as other shops.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -4
v) Dumper Daily Maintenance shop
Checking of water and oil levels, greasing of lubrication points,
checking of air pressure of tyres, brake testing etc. will be
performed in this shop.
vi) Dumper Schedule Maintenance (Lubrication and
Inspection shop)
The schedule maintenance (lubrication and Inspection) of the
dumpers as per schedules recommended by the manufacturers will
be done in this shop.
For this purpose pressurised lubrication system has been provided.
vii) Dozer Repair shop
This shop is meant for carrying out the maintenance and repair of
dozer. The repairs will be done mainly by the replacement of parts,
units and sub-assemblies.
The entrance & exit of dozers will be from one side only.
viii) Welding shop
This shop will take-up the welding of buckets of shovels and other
jobs of dumpers etc. It will also under take other non standard
welding works.
ix) Washing Station
High-pressure water and steam jet washing unit for dumper and
dozer have been envisaged for washing.
x) Stores & Common facilities
A small store is provided for storage of 10 days consumption of
spares & consumables required for repair & maintenance of HEMM
& other mining equipment.
The different repair shops will draw day-to-day requirement of
spares & other consumables from this store.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -5
A fully equipped fuelling station is also provided for fuelling the
vehicles and transport equipment.
10.2 E&M Workshop
Considering the nature of repair and maintenance of E&M
equipment, which is different from the HEMM, a separate E&M
workshop has been envisaged.
This part of the workshop will have the facilities for schedule
maintenance, day to day maintenance and minor & medium repair
by parts/unit replacement method of all E&M equipments deployed
in the project such as- pumps, electrical equipment, CHP
equipment etc.
Broadly this workshop will have the following functional shops:
i) Machine shop,
ii) Mechanical Repair shop,
iii) Electrical Repair shop
i) Machine shop
This shop will undertake machining and reconditioning of spares. It
will also manufacture small spares, which are in short supply and
required for the repair of E&M equipment.
ii) Mechanical Repair shop
The equipment like pumps and pumping installation experiencing
incidental problem in the field and requiring minor repairs will be
brought to this shop where they will be inspected and repaired.
Apart from this the normal maintenance/repair of the pumps & CHP
equipment will be done in this shop.
iii) Electrical Repair shop
This shop will deal with the testing and minor repairing of electrical
components of CHP equipment, pumps, switchgears etc.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-X -6
10.3 Project Store
This workshop will have a project store to meet the total
requirement of proposed workshop as well as additional
requirement of the project. Only day-to-day requirement of spares
and consumables will be kept in the workshop store for smooth
functioning of workshop.
10.4 Working Schedule
This workshop will work mainly in two shifts of 8 hrs. duration but a
group of technical personnel will also be provided in the third shift
to look after the field repairs of mining equipment deployed in this
shift.
10.5 Capital Investment
The details of P&M provided for the workshop along with their
estimated cost have been given in Appendix-A.3.2.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XI -1
CHAPTER - XI
MANPOWER & PRODUCTIVITY
11.1 The manpower requirement for Govindpur Ph-II OC mine for a rated
production of 1.2 MTY of coal has been estimated as 426 (upto target year i.e.,
4th year) for Option-I & III, resulting in an overall OMS of 10.67 Te. The
manpower includes 10 persons for land reclamation/EMP. Earning per man shift
(EMS) is estimated as Rs. 1584.01.
The skill wise break-up of workers (upto target year) is given below: -
Sl. No.
Particulars Category Nos. Percentage of total worker
1. Unskilled I 25 8.4 2. Semi-skilled II, E 27 9.0 3. Skilled C, D, III, IV, V, VI 116 38.8 4. Highly Skilled A, B 131 43.8
Total 299 100
The break-up of total manpower in groups i.e. Workers, monthly paid staff &
officers are given below;
Sl. No.
Particulars No. Percentage of total manpower
1. Workers 299 70.2 2. Monthly Paid Staff 104 24.4 3. Officers 23 5.4
Total 426 100
The manpower would be posted from the internal resources of the company. The
unskilled/semi-skilled manpower may be trained to make them skilled/highly
skilled in order to avoid additional recruitment.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XII -1
CHAPTER – XII
CIVIL CONSTRUCTION
12.1 INTRODUCTION
The life of this project has been estimated as 20 years. For service and
welfare buildings permanent type of construction has been proposed.
The cost estimate for civil construction has been prepared based on the
cost index. The cost index has been worked out as 2082 with respect to
100 base at Delhi as on 01.10.1976. The details have been given in
Appendix- A.2.3.
12.2 BUILDINGS
12.2.1 RESIDENTIAL BUILDINGS
For residential buildings 55% housing satisfaction has been provided.
The manpower provision for this project upto target year is 426 and 235
houses of different type would be required. There are sufficient existing
quarters, so no additional provision for residential buildings has been
made. The details of number of houses are given in Appendix A.2.1.
12.2.2 SERVICE BUILDINGS
Almost all service and welfare buildings exist there. Provision has been
made in this report for construction of site office, Excv. and E&M
workshop, sub station and some statutory buildings. Details of service
buildings and statement showing capital investment have been given in
Appendix- A.2.2.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XII -2
12.3 ROADS & CULVERTS
12.3.1 APPROACH ROAD TO PROJECT
Provision for 1.0 km. long approach road to project has been made.
Details have been given in Appendix-A.8.2.1
.
12.3.2 HAUL ROAD
Provision for 3.5 km. long haul road has been made. Details have been
given in Appendix- A.8.2.2.
12.3.3 BRIDGE
Provision for a permanent bridge over Konar River has been made.
Details have been given in Appendix- A.8.2.2.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XIII -1
CHAPTER - XIII
WATER SUPPLY & SEWERAGE
13.1 WATER DEMAND
The potable and industrial water requirement for the project has been
assessed up to target year as follows:
(i) Portable Water Demand 0.0019 MGPD
(ii) Industrial Water Demand 0.0500 MGPD
13.2 INDUSTRIAL WATER SUPPLY
Details of industrial water supply scheme alongwith the estimated capital
expenditure has been furnished in appendix-A.8.3.1
13.3 INDUSTRIAL SEWERAGE
Estimated capital expenditure for industrial sewerage scheme and details
has been indicated in Appendix-A.8.3.2.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XIV -1
CHAPTER-XIV
LAND
14.0 The land required for the project Govindpur Ph-II OCP (1.2 MTY) is 207.14
Ha. The forest & non-forest land are 60.47 Ha and 146.67 Ha respectively.
The forest in safety zone i.e. 1.95 Ha is included in the above Forest Land.
Primary land data of core zone based on remote sensing are as follows:
Present Land use
Sl.
No.
Type of Land Area (Ha.)
1 Forest 60.47
2 Village NIL
3 GMK Land 45.00
4 Tenancy 10.67
5 Forest in Safety zone (not to be acquired) (-) 1.95
Total 207.14
The break-up of Land Use (in Ha) is given in the below table.
Break-up of Land -use (in Ha)
Sl.
No
Description Forest
Land (Ha)
Non-Forest
Land (Ha)
Total Land
(Ha)
1. Quarry 49.82 26.60 76.42
2. OB Dump 0.00 87.00 87.00
3. Infrastructure/ Workshop/ CHP 2.00 1.12 3.12
4. Haul Road 6.70 12.60 19.30
5. Safety Zone 1.95 19.35 21.30
Total 60.47 146.67 207.14
Less forest in Safety Zone (-) 1.95 0.00 (-) 1.95
Total 58.52 146.67 205.19
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XV -1
CHAPTER-XV 15.0 ENERGY CONSERVATION 15.1 Introduction Conservation of energy in any form is assuming grater importance in
mechanised mines with rapid industrialisation and increase in per capita
consumption of energy resulting in insatiable demand of energy. The time is not
far off when with the existing quantum of energy; the coal mining industry would
be facing a bleak future. Hence it is of paramount importance that the existing
quantum of energy is put to optimal and economical use with a high degree of
conservation. Special emphasis is laid at the project formulation stage to take all
steps for conservation of electrical energy including power consumption and
power demand or fuel consumption. All efforts have been made to incorporate
energy conservation system and equipment to achieve this in the planning and
installation stage itself. At the stage of planning of the equipment of the opencast
mine, a careful study has been made with regard to location of power sub-station
for the mine, selection of equipment, conductor size, operating power factor with
special reference to the conservation of energy.
15.2 Managerial Control To reduce occurrence of maximum power demand of certain group of equipment
at a time and improve the effective load factor, demand meters have been
proposed in each circuit breaker controlling the feeders.
This would reduce power demand of the project at the same level of power
consumption and also relieve the system of transmitting useless power.
15.3 Energy Audit It is suggested that energy audit in the mine would be done regularly to even out
maximum demand, as far as possible. Such an energy audit would not only pin
point the defined areas but also would highlight the areas so that improvement
can be implemented immediately.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XV -2
15.4 Maintenance A special emphasis would be laid on the preventive maintenance of all electrical,
mechanical and HEMM equipment. Energy conservation is very much related to
preventive maintenance. Therefore the preventive maintenance would never be
over looked.
As part of management system, a feedback is necessary for better performance
of equipment and statistical information of breakdowns would help in upgrading
maintenance practices, after meaningful and purposeful analysis resulting in
saving of diesel and power.
15.5 Distribution Network
In the power distribution network, care has been taken to select suitable size of
conductors and cables to minimise losses and voltage drop. It is suggested that
the conductor sizes recommended in the P.R are drawn at the construction stage
of the project itself to avoid duplication of work later on. The size should not be
changed either with higher or lower size of the conductor.
Utilisation of voltage for the HEMM within the mine has been recommended as
6.6/3.3 KV. The transformer has been selected to operate at maximum
efficiency.
Each transformer has been selected to cater to the total load. However, all the
transformers under normal conditions would share the load of the mine.
15.6 Lighting For the purpose of illumination in mine and dump areas, sodium vapour lamps
have been recommended to reduce the energy consumption and to achieve the
desired lux level.
15.7 Haul Road
Dumpers used for transportation of O.B and coal, consume lot of energy inform
of consumption of diesel. For effective fuel conservation, it is suggested that haul
roads, which play an important role in the use of dumpers and fuel consumption
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XV -3
are made better to reduce group resistance. To save energy, therefore, it is
absolutely necessary to maintain good haul roads specially at ramps and
turnings.
15.8 The important areas in the opencast mine working where there is scope of
energy saving, have been indicated above. This emphasizes the following: -
(1) The necessity for going in new system technology and equipment.
(2) Even during planning, the aspect of energy conservation with respect to
equipment size is considered.
(3) During operation, it is imperative to conduct an energy audit just lime
preventive maintenance.
(4) Complete monitoring by proper communication and instrumentation
would identify the areas where there is energy wastage so that corrective
measures are taken.
(5) If it deviates from the standards, causes should be identified and
corrective action may be taken.
(6) Maximisation of utilisation within the load allocated by supply agencies by
flattening the peak demand.
(7) Provision of adequate size of pumps in the mine especially during
monsoon.
(8) Staggering mining activities during usual peak hours.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -1
Chapter – XVI
ECONOMICS
16.0 PR of Govindpur phase-II OCP has been planned at an annual rated target
production of 1.2 MT of coal. The estimated economics has been worked
out considering departmental workings for Coal winning and OB removal.
The summary of the workings is as given below:
OPTION-I Coal Production Departmental OB removal Departmental Average Grade E CHP Coal size (-) 100mm Evacuation of coal Pipradih Railway Siding
The estimated economics has been discussed in the subsequent
paragraphs.
16.1 Total Capital Investment
Initial capital investment has been provided in the proposal till the year of
achieving rated coal production, which is the 4th year. The capital
investment, both Initial as well as beyond target year, has been proposed
from the internal resources of the Company. The capital requirement in Rs.
Crores is given below:
Sl No Particulars Option-I
1 Total Capital up to Target Yr 142.11
2 Existing Capital Expenditure up to 31.3.09 * 45.95
3 Additional Capital Requirement 96.16 4 Specific Investment Rs./te 1184.26 5 Capital beyond target year 2.39
* The Existing capital expenditure of Govindpur and New Swang upto 31.3.2009 has been considered in this report.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -2
The head-wise net effective actual capital expenditure considered in this
PR has been shown in the Table below
New
Sawang Govindpur Total Particulars Rs. lakhs Rs. lakhs Rs. lakhs
Service Building 30.69 95.98 126.67 Land 1284.56 1284.56 Res. Building 22.88 290.20 313.08 Road &Culverts 31.15 111.75 142.9 Water Supply 34.85 4.50 39.35 Electrical 28.94 21.00 49.94 Pump & Pipe 0 0 Weigh Bridge / CHP 0.64 0.64 Work Shop 0 4.36 4.36 Hyd Shovel 64.41 0 64.41 Elec. Shovel 400 K.W. 745.63 745.63 Dumper 35 T 821.72 821.72 Float Engine for Dumper 0.00 0 0 Tipping Truck 2.78 2.78 Water Sprinkler 0.00 0 Elec. Drill 100.87 99.53 200.40 Deisel Drill 0 Dozer 259.64 259.64 FE Loader 31.42 31.42 Surface Crane 0.00 0 0 Veh. General Truck 5.92 7.68 13.60 Exploisive Van 0 Vehicle General Others 5.89 5.89 Vehicle General Jeeps 5.81 5.81 Vehicle General Car 0 Ambulance 0 Prospecting & Boring 0 221.44 221.44 Development CMPDIL Expenses 0 160.78 160.78 Development others (Forest Land) 0 Development Others 0 Other P&M 0 5.64 5.64 Air compressor 0 Mining equip. Mov aux fan 0 Stone Drill 0 Furniture & Fittings 0 Development Sinking wells 0 R&D 0 Drift Others 0 94.36 94.36 Total 2180.90 2414.12 4595.02
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -3
The head-wise actual capital expenditure not considered in this PR has
been shown in the Table below:
Rs.in Lakhs
New Swang Govindpur TOTAL Pumps 4.61 4.61 Work Shop 6.63 6.63 Spare Engines 16.58 275.57* 292.15 Tipping Trucks 29.67 29.67 Old Shovel 27.9 27.90 Tata Hitachi EX-350 Excavator 51.74
51.74
Old Dozers 91-92 3.11 3.11 Old FE Loader 1.21 1.21 Prospecting Boring 423.16 423.16 CMPDIL Expenses 81.79 81.79 Other P&M 0.67 0.67 Drifts 4.76 4.76 Total 651.83 275.57 927.41
*- For shovel
16.2 Capital Investments for P&M
Capital investment on P&M is given in Appendix-A.3.
The specific capital investment on P&M worked out for the options is given
below:
Sl No Particulars Option-I Existing 1 Investment on P&M 77.49 21.84 2 Investment on HEMM 53.77 21.23
Specific investment in Rs./te of coal P&M 645.75 3 HEMM alone 448.08
Method of Estimation of Capital Cost
The method of estimation of capital investment for P&M, Civil estimates,
Development Capital, Revenue expenditure capitalised etc. is as follows.
Prices of Plant & Machinery
For the plant and machinery, as far as possible, the prices have been taken
from the Standard Price List of Mining Equipment published by CMPDI and
whenever information regarding price was not available, a broad estimate
was made.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -4
16.3 Capital Investment on Vehicles
The total estimated existing capital expenditure on vehicles is Rs. 0.82 crs.
Most of the existing vehicles are very old and thus additional provision has
been made for some essential new vehicles.
16.4 Opening of Revenue Account
Though the two mines exist, the Revenue expenditure for OB removal in
the first year of operations has been capitalized. The proposed project will
generate revenue surplus from the second year of its operations in which it
will produce 0.4 Mty of coal.
16.5 Estimates of Operating Cost
Appendix-C of the respective Option gives the details of average cost and
profitability for the target production of 1.20 MTY. The method adopted in
estimating the costs are briefly explained as follows:
(a) Wages
The requirement of manpower for the targeted production of 1.20 MTY of
coal is estimated category-wise/ scale-wise and details of manpower are
given in the respective Appendix - B1. Prevalent pay scales for executives
and non- executives are adopted. End points of the relevant pay scales of
executives & non-executives have been considered in estimating the salary
and wages cost.
(b) Stores
Stores cost consists (1) diesel and lubricants, (2) explosives and detonator,
(3) spares for routine repairs etc. Prevalent norms have been followed in
estimating stores cost.
(c) Power
The Power cost is worked out on the basis of KWH for the machines and
other electrical requirements.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -5
(d) Miscellaneous Expenditure
This covers the expenditure on printing & stationery, postages, telephone,
repairs and maintenance of assets other than P&M, workshop debits for
annual servicing and overhauling of HEMM, insurance and taxes for
vehicles, normative contractual cost of major maintenance of HEMM.
(e) Incidence of Corporate Social Responsibility :
To create a fund for corporate social responsibility, an element of cost has
been kept in the average cost of production. The estimated fund has been
computed as 2% of the total capital over the life of the project. Based on
total reserve, the incidence of this fund on cost of production, works out to
Rs. 1.48/t. This has been absorbed as year-wise cost in the cost of
production on the basis of year-wise production.
(f) Final Mine closure Cost
A fund equal to Rs. 6 lakhs/hectare of leasehold land is proposed to be
created towards a fund for final mine closure. The incidence of this fund on
cost of production at 100% capacity, based on total reserve, works out to
Rs. 6.36/t. This has been absorbed in the cost of production on the basis of
year-wise coal production considering an annual escalation of 5% p.a.
(g) Administrative Charges
This includes area overhead, apex overhead etc. and the cost has been
taken as per the actual administration cost of CCL.
(h) Interest on Working Capital
Rate of the interest on working capital is taken as 14.50% per annum.
(i) Interest on Loan Capital:
As the investment for the project is proposed to be met from the internal
resources of the Company, there is no impact due to interest on loan
capital.
(j) Depreciation
Depreciation on assets is computed as per the prevalent norms. The
straight-line method of charging depreciation has been adopted.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -6
(k) Cost & Profitability
The details of the average cost and profitability estimates at 100% capacity
and at 85% capacity are given in Appendix-C . These have been
summarized in the table below for the three options proposed:-
COAL & OB BOTH DEPARTMENTAL 100% 85%
Year AVR. COST Rs./TONNE
Salaries & Wages 164.88 193.98
Stores cost 183.73 203.18
Power cost 21.03 23.81
Miscellaneous cost 25.16 26.93
Cost Incidence of CSR 1.48 1.48
Adminstrative Expenses 100.00 117.65
Final Mine Closure Cost 11.02 12.97
Interest on working capital 24.52 28.03
Depreciation 98.76 116.19
Total Cost 630.58 724.22
Sales Value/Te (In Rs.) 851.00 851.00
Profit/Loss Per Tonne (In Rs.) 220.42 126.78
The declared Selling Price per tonne of coal has been adopted as follows:
Coal Production Departmental
Average Grade ‘E’ Coal size (-) 100mm
Evacuation of coal Pipradih Railway Siding
Declared Price Rs./te 790.00
Additional charge for sizing Rs./te 61.00 Desired Selling Price to yield 12% IRR at 85% Capacity Rs./te
849.73
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -7
16.6 FINANCIAL ANALYSIS
The year-wise cash flows at 100% and 85% capacity utilisation have been
estimated and are detailed in Appendix-D. & D.1 respectively. The cash-
flows exclude depreciation and interest on loan capital. The financial IRR
on total capital of the project at 100% and 85% level of the rated output
have been worked out based on the estimates of the aforesaid cash flows
and these work out to be 21.37% and 12.10% respectively.
16.7 ECONOMIC ANALYSIS
The year wise cash flow for the economic analysis at 100% and 85%
capacity utilization have been estimated and are detailed in Appendix- D2
and D.3, respectively. In estimating the economic prices, all taxes, duties
and levies have been excluded from cost of inputs and the shadow rate for
wages and salaries have been taken as 1.00. The economic price of coal
has been assumed to be same as its ruling price. Based on the above
methodology, the economic IRR of the project, at 100% and 85% level of
the rated output work out to 28.30% and 19.11% respectively.
16.8 SENSITIVITY ANALYSIS
The following parameters have been identified for assessing their impact
on the profitability of the project.
a) Capital investment
b) Operating cost
c) Capacity utilisation
d) Selling price of coal
The above parameters have been increased / decreased in Steps of 5% to a
maximum of 25% over the base case and the IRR have been computed. The
following table summarises the results of sensitivity analysis:
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVI -8
IRR AT DIFFERENT STAGES OF Sl No Variable Parameter
0% 5% 10% 15% 20% 25% 1 Increase in Capital 21.37 20.58 19.80 19.07 18.36 17.67
2 Increase in Cost of Production
21.37 19.30 17.17 14.96 12.65 10.20
3 Decrease in Capacity 21.37 18.47 15.39 12.10 8.49 4.41 4 Decrease in Selling Price 21.37 18.07 14.53 10.69 6.39 1.32
16.9 Completion cost of the project
Completion cost of the project is up to targeted year is given at Annexure-
A’. Financial and Economic IRR of the project, based on the estimated
completion capital is given in Appendix- D.4, D.5, D.6 & D.7, respectively
for both 100% and 85% capacity utilization.
Sl. No. Particulars OPTION 1 Completion Capital Rs. Crs 165.22
Fin. Internal Rate of return a) at 100% Capacity 18.79 2 b) at 85% Capacity 9.97 Economic Internal Rate of
return
a) at 100% Capacity 25.66 3
b) at 85% Capacity 15.66
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -1
CHAPTER-XVII
SAFETY & CONSERVATION
Outside agency deploying HEMM or any equipment in the mine for excavation of
coal shall plan their activities in conformation with the prevailing statutory
provisions as per Mines Act 1952 and CMR 1957 applicable for safety in
opencast mines. However, all statutory rules, regulations, applicable laws etc.
and statutory requirement related to Govt. licenses, workers compensation,
Insurance, etc., including minimum wage act for workers employed by the
outside agency shall have to be adhered to. Rules if any imposed by
local/State/Central authorities should also be complied by leaser of
HEMM/equipment and then shall have to supply various protective equipments
viz. helmet, shoes etc. to the workmen at their cost.
All the regulations & schedules of coal mines Regulations 1957 relating to
opencast mining have to be adhered to and implemented in order to maintain
day to day safety precautions as per stature.
SAFETY ASPECTS FOR OUTSOURCING/HIRING OF HEMM/EQUIPMENT
Special precaution should be taken while deploying workers in the mine. Before
employing any labour to the mine proper vocation training should be imparted
and recommendations of VIII Safety Conference should be strictly followed.
Terms and conditions shall be fixed by management for deployment of labourers
by outside agency. Some of the major aspects are as follows:-
A) For persons :
i) No persons shall be deployed unless he is trained at VTC
ii) Records in Form-B Form-D shall be maintained.
iii) Records of Vocational training Certificate and driving license of
operators shall be kept by HEMM outsourcing agency and shall
be made readily available for inspection by management.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -2
iv) No person shall be employed unless person holds VTC
certificate and Management is informed. A record of it shall be
maintained.
v) Adequate supervision shall be maintained by qualified
competent persons.
vi) Outside agency shall follow safety guidelines and safety
instructions from Project Authorities.
B) For Machineries as recommended by DGMS Cir. (Tech.) 1 of 1999:
i) All the machineries to be deployed in mines should be checked
before deployment by competent authority.
ii) Regular checking of m/c deployed by outside agency shall be
done. No unfit machine shall be deployed before the defect is
rectified.
iii) A proper record of repair and maintenance along with inspection
done by management and defect pointed out shall be
maintained and signed by authorized person.
iv) The trucks deployed by outside agency shall be provided with
Audio-visual alarms, proper light for use at night and period
when natural light is not sufficient. Also audio-visual alarms for
reversing on trucks shall be provided.
Other Precautions for machines
i) RTO certificate photo copies of all vehicles shall be submitted to
management
ii) Daily welding, monitoring, inspection shall be done by the agency’s
mechanic as directed by management.
iii) Machine manufacturers should be asked to give risk analysis
details in respect machines deployed by outside agencies..
iv) Suitable type of the fire extinguishers shall be provided in every
machine.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -3
C) General :
i) No person/vehicle shall be deployed at any place other than
authorized place.
ii) All workers should obey lawful instruction of mine management.
iii) Risk Management Plan of tipper/pay loader shall be made and
implemented.
iv) All drivers shall obey systematic traffics rules prepared by
management
v) Before deploying workers they must be trained and briefed
about safety aspects in opencast mine. However during course
of execution of the work, if any accident occurs whether major
or minor, the matter shall have to be immediately informed to
mine management i.e. Colliery Manager/Agent/GM of Area so
that Notices of accidents in a accordance of (Reg.9 of CMR
1957) and Section 23 of Mines Act 1952 may be given and
other necessary steps may be taken in accordance with the
Mines Act 1952.
vi) Outside Agency shall operate transport system in such a way so
as to minimize pollution in the mine.
Stability of Benches, Quarry High walls and Spoil Dumps:
During quarry operations, it is necessary to adopt required mining parameters for
the stability of benches, high walls and spoil dumps. It is also mandatory to
examine systematically the fencing of mine workings, land slides and cracks
between benches. It is required to maintain well graded and wide roads on
benches keeping the width of working areas sufficient for spreading of blasted
rock and movement of the mining and transport equipment.
During actual mining operation, systematic observations of the condition of
benches, high wall slopes and spoil dumps should be carried out and the
dimensions be modified if necessary to suit the local conditions.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -4
Precautions against Danger of Inundation from Surface Water:
1) A careful assessment is to be made against the danger from
surface water before the onset of rainy season. The necessary
precautions should be clearly laid down and implemented. Garland
drains need to be provided to drain away the surface rain water
from coming into the mine.
2) Inspections for any accumulation of rain water, obstruction in
normal drainage and weakening in embankment.
3) Standing order; for withdrawal of working persons in case of
apprehended danger.
4) During heavy rain inspection of vulnerable points is essential. In
case of any danger persons are to be withdrawn to safer places.
5) Nallah or water inlets may be diverted or isolated by
embankments if so required.
Prevention of Flooding of Equipment Deployed at Bottom Horizons:
During the heavy monsoon period, the mining operation in the lower-most
bench may have to be stopped. Therefore, it is proposed to drown the lower-
most bench, which would work as a sump. The water will be pumped out and
discharged into the nearby Nalla.
For ensuring safety of the equipment while working out bottom horizons with no
access to surface profile, the following measures should be taken:
1) Drivage of initial trenches and coal cutting on bottom benches should be
done during the dry period of the year.
2) Ramps should be made for quick shifting of equipment from bottom
horizons, liable to be flooded during monsoon period, to the top horizons.
Prevention of Electric Shocks:
During mining operations, all the statutory provisions of the Indian Electricity
Rules 1956, and Indian Standards for installation and maintenance of electrical
equipment etc. should be observed.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -5
1) For protection from electric shocks to persons, from electrical equipment
with voltage up to 1000V Earth Leakage Relay should be provided which
will automatically disconnect electrical circuits.
2) Closed mobile substations and switchgears should be mechanically
interlocked which exclude the possibility of opening the door when oil
switch and air circuit breakers are in operation.
3) All metal parts of electrical equipment should be properly earthed to avoid
failure of insulation.
4) All H.T lines and cables located within the blasting zones should be
disconnected during blasting operations.
Dust Suppression & Dilution of Exhaust Fumes:
The following measures should be adopted for dust suppression at all quarry
working places, dumps, haul roads, CHP and near other auxiliary mining
operations.
1) Spraying with water on all working faces & haul roads, by special spraying
machines or water-sprinkler.
2) While drilling holes, it is necessary to use dust extraction devices.
3) Installation of local dust suppression and air conditioning devices in cabins
of excavators and drilling rigs may be considered.
4) Levelling of spoil dump surface.
5) Separate dust suppression arrangement should be provided for CHP.
To prevent collection of harmful mixtures in the atmosphere, from the different
sections of quarry workings, it is recommended: -
1) To spread out the sources of dust formation and omission of harmful
gases throughout the working area of the quarry.
2) Drilling & blasting operations should be timed for periods of maximum
wind activity during the day.
3) Dumpers may be provided with purifiers for exhaust gases.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVII -6
Measures to be taken for Fire Fighting and Fire Prevention:
In addition to statutory provisions, the measures for fire fighting and prevention of
fires are as follows:
1) Organisation of special cell for systematic observations to examine and
prevent fire
2) Removal of spillage of coal on benches and cleaning of coal horizons to
prevent cases of coal heating.
3) Storage of lubricants and cotton waste in enclosed fireproof containers in
working places.
4) Provision of fire extinguishers
Measures to be taken while Drilling Blasting:
Following measures should be taken while drilling and blasting operations in the
quarry:
1) Drilling and Blasting in quarry should be done in accordance with the
provisions of Mines Safety Act, rules and regulations.
2) Adequate safety measures have to be taken during blasting operation in
the quarry so that men/machine is not affected.
Conservation:
The project considers exploitation of Upper Karo group of seams from Seam VI
to Seam XI as per the calendar plan.
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Job No. 340721 Chapter-XVIII -1
CHAPTER- XVIII
MINE CLOSURE
Mine closure operations is proposed to be undertaken after examination and
detailed study that there is no further expansion possibility of the mine and the
void is to be suitably filled up so that the land is utilized gainfully by the society.
Intermediate stoppages of operations due to any reasons for a period of time do
not come under the proposed scheme of mine closure. This chapter proposes
following aspects: -
A. Technical Aspects
B. Environmental Aspects
C. Social Aspects
D. Financial Aspects
18.1 TECHNICAL ASPECTS
� Safety aspects.
� Pit slopes and waste dumps.
� Hydrology and hydrogeology.
� Details of decommissioning of the infrastructures.
� Closure of entries like pits and entry to the mine.
18.1.1 Safety
After attaining the final stage dump (including internal Dump) the remaining
portion between dump toe and final stage Quarry floor should be fenced properly
so that no human being or stray animals should be trapped within. Internal
dumps are proposed to be suitably re-graded to avoid deep trenches.
18.1.2 Pit Slopes and waste dumps
The final pit slopes are designed to avoid any slope failure. Technical study is
proposed to be conducted before deciding upon the final slope. Both the external
and internal Dumps are designed in such a way that there are minimal chances
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Job No. 340721 Chapter-XVIII -2
of slope failure. The external Dump is sloped ultimately in the overall range of 25
degree to 28 degrees. The internal dump slopes are designed at milder gradient
so that even with the percolation of water in the dip side of the quarry, the dumps
remain stable. It is proposed that the internal and external dump must be
provided with toe walls/ silt arrestors and garland drains. Vegetation cover on
surface of these dumps is proposed to be ensured as a final closing operation.
18.1.3 Hydrology and Hydrogeology
In the mine closure plan, the surface flow pattern of precipitation and mine water
drainage is envisaged to be examined and the water channel suitably laid down
so that this is acceptable to the local community and it do not disturb the general
hydrology of the area. Efforts are proposed to be made to regenerate the ground
water resources.
18.1.4 Decommissioning of the infrastructure-
The coal project develops lot of infrastructure for sustaining their operations.
These include Workshop, Coal Handling Plant, Railway Siding, Office Complex,
Residential Complex, Roads, Pipe Lines and Transmission Line.
Decommissioning of the infrastructure should be planned in such a way that the
Land occupied by these infrastructures is released. However, these
infrastructure is proposed to be reused for the neighboring projects /mine.
18.1.5 Closure of entry to the mine-
All entries to the mine must be effectively sealed. This will prevent illegal mining,
entry of fire and water etc.
18.2 ENVIRONMENTAL ASPECTS
� Air, water, dust.
� Reclamation of forest/vegetation.
� Management of recharge areas.
� Acceptable surface and ground water flows.
� Alternative use of land
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Job No. 340721 Chapter-XVIII -3
18.2.1 Air, water, dust
It is proposed that air quality; water quality and dust level is to be monitored.
Necessary actions to check the pollution from the closed mine, if any, in respect
of air, water and dust is to be taken after examining the local site conditions then
prevailing.
18.2.2 Reclamation of Forests/ vegetation:
It is proposed that major portion of the project area is covered with vegetation.
This will involve both forestland as well as non-forest land. Certain areas, mostly
industrial areas, where service building are proposed to be located and to be
used are not proposed for plantation.
18.2.3 Management of recharge areas:
It is proposed that the recharge areas are fully utilized and sufficient availability
of water, if feasible, is ensured to enhance ground water availability.
18.2.4 Surface and ground water flows
In the final stage, wherever the mine water is likely to flow out to surface and
meet the natural drainage system, the quality of water is proposed to be
assessed and flow pattern for mine water be properly modified/ redesigned.
Alternately, the water treatment arrangements may be considered depending
upon the local site conditions.
18.2.5 Alternative use of land
During the mining operation, the land usage changes from its pre-mining
scenario. The final stage land use plan shows the use of land in a post-mining
scenario when coal-mining operations have completed. Alternative use of land,
specially released from infrastructure areas and vacant areas, as proposed to be
planned and properly designated for post-mining land uses depending on the
existing conditions prevailing at that point of time. While for OB dumps and
acquired forest areas, vegetation and afforestation has been proposed as a final
land use. While agriculture may be the best land use, if feasible, and if it is
supported by some irrigation facilities.
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Job No. 340721 Chapter-XVIII -4
18.3 SOCIAL ASPECTS
� Re-deployment of work force.
� Management of community facilities
� Canalization of available water
18.3.1 Re-deployment of work force
The peak work force required for mine operations is in the first few years of the
mine when construction activities as well as operational activities achieved their
peak.
This work force slowly goes down with completion of development and when only
the operational work remains. Again near the end of the mine life, say 4-5 years
before closure, the activity of the mine starts getting reduced and therefore
management gets opportunity to taper the operational manpower. After closure,
skeleton service people are proposed to be left for continuing with the actual
closure operations. The reduction of manpower could be done as per the
following options:
• Natural retirement.
• Implementation of VRS schemes for age group of +50.
• Retraining and redeployment of younger groups – 40.
• Transfer of experienced middle-aged groups between 40-50 years to
other projects.
Retrenchment of people with suitable compensation after exhausting all the
above options.
18.3.2 Management of Community Facilities
The community facilities are proposed to be developed by coal projects for
betterment of the neighboring community. The project management provides or
assists in developing educational facilities, health facilities, community halls and
also some communication facilities. After the mine closure, these facilities are to
be continued for the neighboring communities to the possible extent. The closure
plan will envisage interaction of mining company with the state or local bodies
who will take over these facilities and run the same for the community. A onetime
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVIII -5
payment may be made by the coal companies towards running these facilities,
which is proposed to be taken care of by the local/state bodies.
18.3.3 Canalization of available water
If it is found that the mine is having sufficient water and on closure, the mine
water flows into the surface watercourses, canalizing this water for surrounding
community for their irrigational/domestic uses may be taken up.
18.4 FINANCIAL ASPECTS:
� Creation of a corpus fund for the final mine closure
� Cost of closure activities.
� Cost towards organization for executing the closure activities.
� Cost of the post project monitoring
� Bond/insurance for the closure cost � 18.4.1 Creation of a corpus fund for the final mine closure
It is proposed that a corpus fund for final mine closure to be created from the
retained earnings of the project. The fund creation is proposed to be started after
the project earns revenue, which is in surplus, after deducting all the negative
cash flows. Preferably the corpus fund should be created after the mine comes
under revenue. However, in case of shortage of funds, corpus fund creation may
be deferred till the mine attains target production. This fund should be judiciously
created so that the objective of the final mine closure can be smoothly met. This
will depend on the local site conditions, requirement of mine closure, mine
closure plan. Site specific mine closure plan is proposed to be prepared and
approval of the company board may be obtained. A provision towards Corpus
fund equal to Rs. 6 lakhs/hectare of leasehold land is proposed to be created
towards a fund for final mine closure. The incidence of this fund on cost of
production at 100% capacity, based on total reserve, works out to Rs. 6.36/t.
This has been absorbed in the cost of production on the basis of year-wise coal
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVIII -6
production considering an annual escalation of 5% p.a. This fund will not only
cater for re-grading but will also cover other ancillary expenditure.
18.4.2 Cost of Closure Activities
As proposed above, many activities are proposed to be undertaken after the
closure of the mines, which naturally will involve expenditure. Some of the
closure activities will, in fact, form part of normal mining operations. However,
some activities are proposed to be addressed only after completion of the coal
mining operations. The cost for all those activities, which are to be executed after
coal winning, is proposed from the retained earning of the project for meeting the
expenses.
18.4.3 Cost of Organization for executing the closure activities
After the completion of the coal mining, an organization consisting of persons of
different disciplines is proposed to be maintained to undertake and implement
the closure activities. The organization may be provided with a vehicle for
discharging day-to-day duties. Maintenance cost of this organization is proposed
from the retain earnings of the project. A small team consisting of 2-3 technical
people may be required to oversee the efficacy of the closure activities. This
monitoring may be conducted for 4-5 years after the mine closure activities.
18.4.4 Cost of the post project monitoring
After the closure activities have been implemented the project is proposed to be
monitored regularly for 4 to 5 years. During this period of 4-5 years, cost towards
project monitoring is proposed from the retain earnings of the project.
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Job No. 340721 Chapter-XVIII -7
ENVIRONMENT
18.5 General
Govindpur Phase - II Opencast project is one of the new coal projects of the
East Bokaro Coalfields of C.C.L. The proposed OCP is located in the North –
West part of existing Govindpur lease hold area between Konar River on the
west and Montico Nallah on the east. The block covers an area of about 8 sq.
km. Govindpur OCP Phase - II falls in the Govindpur Northern sub-block, which
forms the northern most part of the Govindpur Block, with an area of about 3.5
sq. km. are potential seams for opencast mining, both qualitatively and
quantitatively. Considering the mining aspect, shovel- dumper mining system
has been envisaged.
Due to liberalization and globalisation in the country, there are sudden surge in
power demand. In our country, 80% of total power demand is met by thermal
power. This trend is expected to continue for at least another 50 Years. As per a
study, it has been estimated that there would be shortage of power grade coal
for generation of electricity in the country. So, to meet the power demand, it
would require more thermal power stations and consequently more coal. There
is already shortage of indigenous coal and this shortfall is expected to be around
260Mt in XI year plan. To meet the coal demand, it is very important to increase
the coal production by opening the new mines or expanding old project. In order
to bridge the gap, between demand and availability, a project report of
Govindpur Phase - II OCP (1.20Mty) has been prepared. Opening of Govindpur
Phase - II OCP is being sought because it is technically and economically viable.
This project will be very much helpful in the development of economical condition
of country. More over, this will generate employment opportunity. This will also
increase the economical condition of these places with the improvement in basic
needs of people such that communication, education and medical facilities.
Thus, we can see that opening of this mine is very important in the economical
development of country.
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVIII -8
18.5.1 Pollution & Mitigation Measures: -
Any opencast mining project particularly coal mines pollutes the various
attributes of environment. Major affecting parameters are Air, Water, Noise and
land. Details of study about the effect due to pollution in this parameter have
been discussed and various mitigation measures are suggested in respective
chapter.
Precautions against the pollution are taken, right from the planning time of the
project. Utmost care has been taken during the planning period so that there is
least generation of pollution and suitable mitigation measures against these
pollutants.
18.5.1.1 Air: -One of the worst affected environmental attributes in mining
project is air, which gets polluted due to blasting, excavating, transporting,
loading & unloading of coal and OB. These activities of mining create the
pollution by increasing the SPM level in the environment. This is low fugitive in
nature and settled quickly and more over this is not harmful gas. Emission from
the exhaust of vehicle spread SOx and NOX. The SOx and NOX are fugitive in
nature and disperse in atmosphere.
It is envisaged that there would be good quality haul road with maximum slope
1:16 in general and coal transport is to be done by rail. HEMM to be maintained
on time schedule frame and low Sulphur diesel would be used. This will reduce
the emission from the exhaust of vehicles, so the SOX and NOX.
During the operational time, water sprinkling will be done regularly; Haul road
and other roads will be maintained and cleaned properly and regularly. Dust bag
is to be used in drilling machine and blasting will be done at the time of
maximum mixing height. All loading, unloading and transfer point will be wetted
by water. These measures will reduce the generation of SPM to a large extent.
For preventing the SPM to spread, green belt along the quarry, haul road
workshop, external OB dump, colony, etc would be developed.
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Job No. 340721 Chapter-XVIII -9
18.5.1.2 Water: - Water is another environmental attributes that get polluted from
the effluent of mine water, workshop etc. However, these pollutants are only
physical in nature in the form of TSS, which are easily filterable and not much
harmful to human or aquatic life. Generally, water does not get polluted
chemically in Indian mines.
Preventing the water pollutions also start right from the planning stage. Planning
is done in such a way that there is zero effluent discharge in dry days. Effluent
will be recycled. In rainy days, effluent is allowed to discharge only after proper
treatments. Storm water drain network in the whole area, have been planned in
such a way that the surface run-off flow from the dirty area do not get mixed up
with clean area flow. Clean area water flow will be allowed to discharge directly
in to natural drain. While the dirty area water flow will be treated properly before
discharging in to natural drain. These measures will reduce the surface water
pollution to a large extent.
Due to opening of mine, there is lowering of water table. As per detailed
hydrological report, water table is to be affected up-to a maximum distance of
600 m from the edge of quarry for the mining depth of 100 m. It is not a big area,
so there is no hindrance for a large population.
18.5.1.3 Spoil Dump
The total volume of O.B to be removed is estimated as 28.66 M.cum. 24.00
M.cum of O.B is proposed to be placed at the external OB dump and the rest OB
of 4.66 M cum is to be placed as internal dump. The area of proposed external
dump is 87.00 Ha.
Big and high spoil dumps give the very ugly look to the local aesthetic view as
well as it increase the air and water pollution. Hence it needs a careful
reclamation plan so as it can be utilized by local people and aesthetically
matches with the local topography.
Keeping in view of the above, all spoil dumps would be reclaimed both physically
and biologically. Physical reclamation would be done in such a way that human
and animal can reach the top easily and it will encourage animals to make their
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Job No. 340721 Chapter-XVIII -10
dwellings. Biological reclamation would be done in such a way that local people
get benefited from it. Mixed type plantation will be done which is sustainable in
the local climate and environment.
18.5.1.4 Land: As we know, open cast mining completely changes the
topography of the area i.e. It creates large open deep excavation pit and huge
high O.B. dumps. As the dump materials are in loose state and surface does not
conform to natural angle of repose. So in this condition, unless they are treated,
they are venerable to erosion caused by blowing wind and surface run-off.
Continuous erosion of deep slope may lead to slope failure-causing loss of
property and life. Such untreated dumps constitute a potential source of air and
water pollution and safety hazard for employees.
Overburden dumps needs the continuous parallel process of reclamation with
mining works till the closer of mine. After closure of mines it needs reclamation of
whole area to improve the over all aesthetics view in such a away that area
become the source of income for the local inhabitant.
Land Reclamation does not mean restoration of the degraded land to the pre-
mining land pattern.
There are several options available for land use pattern for reclaimed land.
Factors discussed below would be considered for selection of appropriate land
use pattern for reclaimed land.
(i) Pre-mining land use pattern
(ii) Properties of top soil/sub-soil
(iii) Socio-economic factors
(iv) Availability of technology for reclamation
(v) Climatic condition
(vi) Existing Flora & Fauna in the area.
Now-a-days mine plan is being prepared in such a way that there is zero effluent
discharge in dry days. In rainy days, effluent is allowed to discharge only after
proper treatments. There will be increase in the depth of water table due to deep
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Job No. 340721 Chapter-XVIII -11
excavation for mining but this effect would be occurred up-to maximum extent of
one Km. from the cutting edge of mine.
18.5.1.5 Infrastructure:
18.5.1.5.1 Housing:
The existing Residential Buildings of New Sawang OCP will suffice the needs of
this Project. Hence, no additional Residential Buildings will be required.
Accordingly, no additional capital has to be provided in this head.
18.5.1.5.2 Services:
Major service buildings like PO office, site office, store shed, electrical sub-
station, workshop shed etc. are already existing in the project.
18.5.1.5.3 Workshop & Store
This Project Report has been prepared for 1.2 MTY, a Unit Workshop consisting
of Excavation and E&M workshop has been proposed. This unit of workshop is
envisaged to cater the need of daily maintenance schedule maintenance,
lubrication, routine inspection, minor/medium repair and replacement of
parts/sub assemblies of HEMM such as Dumpers, Dozers Shovels etc.
18.5.1.5.4 Power Supply
Presently the Govindpur Ph-II O/C Project substation (1x3 MVA, 11/3.3 kV) is
receiving power at 11 kV through one no. independent single feeder with ACSR
Conductor from Kathara Regional Substation (1x10 MVA, 33/11 kV). This
Substation is situated near Kathara o/c Project at a distance of 12.0 Km
(approx). It is proposed to install another 2 MVA 11/3.3 kV Transformer for
additional electrical equipments and loads. Power shall be distributed from this
sub-station to various additional electrical equipment and load points. Power
shall be distributed from this sub-station to various additional electrical
equipment and load points. Estimated maximum power demand for this project
will be 918 kVA. Heavy Earth moving Machines consume significant power in
opencast project. Coal Handling Plant including crushing & material handling
facilities, mine dewatering, workshop, offices, colony etc. add to the total power
Project Report for Govindpur Ph-II OCP, CCL CMPDI
Job No. 340721 Chapter-XVIII -12
demand of the project. On achieving the targeted Coal production and
commissioning of Shovels, drills, coal Handling plant, Workshop and Main
Pumps, the power demand of the OCP is expected to touch the maximum
demand.
18.5.1.5.5 Road & Culverts
Approach road to mine and colony roads exist there. However provision of 3.5km
of haul road and 1km of approach road to project has made.
18.5.1.5.6 Water Supply and Sewerage
Additional provision has been made to fulfill the potable and industrial water
demand.
18.5.1.5.7 Railway Siding:
The coal from this OCP is proposed to be dispatched to Pipradih Siding.
18.5.1.5.8 Coal Handling Plant
The Coal Handling Plant for this project is envisaged to handle total production
(1.2 MTY) of coal from the mine.
The coal handling plant shall have facilities for receiving coal from rear discharge
dumpers, crushing of coal to (-) 100 mm size, conveying, storing, reclamation
and loading into evacuation network of conveyor. Sufficient storage has been
provided in the coal handling system to meet the eventualities of disrupted coal
production in the mine or dispatch irregularities.
The plant will be operated in synchronization with the production of the mine.
The coal handling plant shall also be provided with suitable repair,
communication and other auxiliary facilities to meet the day-to-day requirement
in the plant operation.
(a) Feed Size in MM :- (-) 1200
(b) Product Size In MM :- (-) 100
(c) Mode of Dispatch :- By Tipping truck to near by siding
or to customer
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Job No. 340721 Chapter-XVIII -13
(d) System Capacity :- 1.2 MTY
18.5.1.5.9 Pumping & Drainage
The planning of dewatering the mine shall be done in such a way that the
working faces and haul roads in these quarries shall remain dry as far as
possible. The layout of the quarry provides suitable gradient along the quarry
floors and the benches to facilitate self-drainage of water to the sump at the
lowest level of the quarry. During the heavy monsoon period, the work in lower
most benches may have to be stopped, as it will not be possible to pump out the
entire make of water on the wettest day. Therefore, it is proposed to drawn a part
of the lower-most bench, which would, then act as sump. Water accumulated in
the mine sump will be pumped out to the surface and finally discharged into the
near by main drain / Nala of the mine.