copia de block cave costing general

8/10/2019 Copia de Block Cave Costing General

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BLOCK C

Primarily Getechnical-Caveability AssessmentRMR 70Minimum block width (m) 120MRMR 63

Stable Hydraulic RadiusHR (m) 23.7Major axis of HR (m) 78Maximum HOD 240

Caving Hydraulic RadiusHR (m) 31.8Major axis of HR (m) 136Maximum HOD 272

Maximum Height of Draw Based on Stress CriteriaSpecific gravity of the block (t/m3) 2.65

Horizontal/ vertical stress ratio (k) 2.5Uncofined strength(UCS) (Mpa) 120

Open Pit Depth (m) 600Safety factor (S1-S3)/UCS 0.6Production level depth (m) 811Vertical stress (Mpa) 22Horizontal stress (Mpa) 54Abutment vertical stress (Mpa) 54Mining method Pre Undercutting Caving

RMR (biewniaski) 55Hoek and Brown parameter (s) 0.200UCS rock mass 54

xK

dpKd

UCSfs

xKxdpdUCSfsfsUCS

SS

)1(

*100**

*)(*100/*31


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VE- CAVEABILITY

Courtesy of Denis Lau

y = -0.0171x2+ 2.4571x + 2

R = 0.9939

y = -0.0171x2+ 2.4429x + 14.714R = 0.9925

0

10

20

30

40

50

60

70

80

90

100

0 10 20 30 40 50 60

MRM

R

HR (Area/Perim

Stable

Transition

Cave


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HR MRMR1 MRMR2

0 0 12

10 26 40

20 48 6030 60 72

40 70 82

50 80 92

60 90 102

scher, 1994

70eter)


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BLOCK CAVE-

Geotechnical InformationRMR 0-20 20-40 40-60 60-80ff/m 50-7 20-1.5 5-0.4 1.5-0.2Rock size range (m) 0.01-0.3 0.1-2 0.4-5 1.5-9

Loading width/Isolated draw diameter (m)5m 11.5 134m 9 11 12.53m 6.5 8.5 10.5 122m 6 8 10

Primarily InputsIsolated draw diameter (m) 8

Layout DesignMaximum draw point spacing (m) 12Maximum drawbell spacing (B) (m) 12

Maximum production drift spacing (A) (m) 24Draw point area 144

Grizzly Method LHD Mechanized Method

A

B


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DRAW POINT SPACING


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BLOCK CAVE-

Input Parameters to Compute Height of Interaction Zone (HIZ)ff/m rating 28Variance of ff/m rating 0

Draw Point Spacing Major Apex (m) 18.8Fragmentation Index 33Height of Interaction (m) 43

Input Parameters to Compute Percentage of Dilution EntryTonnage Variance Within a Month 6Swell Factor 1.4Height of Draw (m) 500Draw Control Factor 0.751

Percentage of Dilution Entry 92%

D(ff/m)/ Frag. Indexslope

Intercept

Ln(x)/HIZslope

Intercept


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DrawC

ontrolFactor


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ILUTION ASSESSMENT

Courtesy of Denis Lau

Tables to Model HIZ from D. Laubscher Theory

0 7 15 251.025 1.075 1.125 1.15

4 11 18 28

10 12 14 16 18 20 22 2467.416 77.652 74.152 72.681 63.562 56.111 54.94 56.098-165.74 -216.28 -220.49 -228.04 -206.03 -186.77 -189.34 -202.95

Variance DCF


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0 11 0.973 0.95

4 0.95 0.826 0.751

8 0.6159 0.511 0.3

y = -0.0051x2- 0.0083x + 0.9989

0

.1

.2

.3

.4

.5

.6

.7

.8

.9

0 2 4 6 8 10 12

Coeficient of Variation of Tonnages


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scher, 1994

2654.54

-204.88


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BLOCK CAVE-

Input Parameters for Mixing

Percentage Dilution Entry 75%Height of Mineralized Column Hc (m) 160 x ySlope 80 0 120Intercept 120 1 200

Height of Draw % Dilution10 0%20 0%30 0%40 0%50 0%60 0%70 0%80 0%

90 0%100 0%110 0%

120 0%130 13%140 25%150 38%160 50%170 63%180 75%190 88%

200 100%210 100%220 100%230 100%240 100%250 100%260 100%270 100%280 100%

290 100%300 100%310 100%320 100%

0

20

40

60

80

100

120

140160

180

200

220

0 0.1 0.2 0.3

HeightofDraw


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330 100%340 100%350 100%

360 100%370 100%380 100%

390 100%400 100%410 100%420 100%430 100%440 100%450 100%460 100%

470 100%480 100%490 100%500 100%

510 100%520 100%530 100%540 100%550 100%560 100%

570 100%580 100%590 100%600 100%610 100%620 100%630 100%


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OINT DILUTION

0.4 0.5 0.6 0.7 0.8 0.9 1

Percentage Dilution


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BLOCK CAVE- MI

Mixing ParametersBlocks 50Height 20HOD 160PDE 15%Grade profile

Slice Height %Ox After Dilut1 20 1 1.02 40 1 1.0

3 60 1 1.04 80 1 0.95 100 1 0.96 120 1 0.87 140 1 0.78 160 1 0.6

9 180 1 0.610 200 1 0.611 220 0 0.512 240 0 0.413 260 0 0.414 280 0 0.3

15 300 0 0.216 320 0 0.117 340 0 0.118 360 0 -

19 380 0 -20 400 0 -21 420 0 -22 440 0 -23 460 0 -24 480 0 -25 500 0 -26 520 0 -27 540 0 -

28 560 0 -29 580 0 -30 600 0 -31 620 0 -32 640 0 -33 660 0 -34 680 0 -35 700 0 -

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340

360

380

400

420

440

460

Heighto

fDraw


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36 720 0 -37 740 0 -38 760 0 -

39 780 0 -40 800 0 -41 820 0 -

42 840 0 -43 860 0 -44 880 0 -45 900 0 -46 920 0 -47 940 0 -48 960 0 -49 980 0 -50 1000 0 -

Scaled Mixing Fractions

1 2 3 4 5Slice Height Pto1 pto2 20 40 60 80 100

1 20 3 37 0.5 0 0 0 02 40 6 74 0.294117647 0.5 0.21 0 03 60 9 111 0.098039216 0.2 0.29 0.3 0.114 80 12 148 0.049019608 0.1 0.15 0.2 0.255 100 15 185 0.029411765 0.06 0.09 0.12 0.156 120 18 222 0.019607843 0.04 0.06 0.08 0.17 140 21 259 0.009803922 0.03 0.04 0.06 0.078 160 24 296 0 0.02 0.03 0.04 0.05

9 180 44 316 0 0.06 0.07 0.07 0.0710 200 64 336 0 0 0.06 0.07 0.07

11 220 84 356 0 0 0 0.06 0.0712 240 104 376 0 0 0 0 0.0613 260 124 396 0 0 0 0 014 280 144 416 0 0 0 0 015 300 164 436 0 0 0 0 016 320 184 456 0 0 0 0 017 340 204 476 0 0 0 0 018 360 224 496 0 0 0 0 019 380 244 516 0 0 0 0 020 400 264 536 0 0 0 0 0

21 420 284 556 0 0 0 0 022 440 304 576 0 0 0 0 023 460 324 596 0 0 0 0 0

24 480 344 616 0 0 0 0 025 500 364 636 0 0 0 0 026 520 384 656 0 0 0 0 027 540 404 676 0 0 0 0 028 560 424 696 0 0 0 0 029 580 444 716 0 0 0 0 0

30 600 464 736 0 0 0 0 031 620 484 756 0 0 0 0 032 640 504 776 0 0 0 0 0


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33 660 524 796 0 0 0 0 034 680 544 816 0 0 0 0 035 700 564 836 0 0 0 0 0

36 720 584 856 0 0 0 0 037 740 604 876 0 0 0 0 038 760 624 896 0 0 0 0 0

39 780 644 916 0 0 0 0 040 800 664 936 0 0 0 0 041 820 684 956 0 0 0 0 042 840 704 976 0 0 0 0 043 860 724 996 0 0 0 0 044 880 744 1016 0 0 0 0 045 900 764 1036 0 0 0 0 046 920 784 1056 0 0 0 0 0

47 940 804 1076 0 0 0 0 048 960 824 1096 0 0 0 0 049 980 844 1116 0 0 0 0 050 1000 864 1136 0 0 0 0 0

1 1 1 1 1


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XING

1 2

0

0.2

0.4

0.6

0.8

1

1.2

20 40 60 80 100 120 14


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6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0.21 0.06 0 0 0 0 0 0 0 0 0 0 0 0 0 00.18 0.21 0.15 0.03 0 0 0 0 0 0 0 0 0 0 0 00.12 0.14 0.16 0.18 0.11 0.01 0 0 0 0 0 0 0 0 0 00.08 0.1 0.11 0.13 0.14 0.15 0.08 0 0 0 0 0 0 0 0 00.06 0.07 0.08 0.09 0.11 0.12 0.13 0.13 0.06 0 0 0 0 0 0 0

0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 00.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0

0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 00.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 00.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0

0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 00 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.060 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07

0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07

0 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0 0.06 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.060 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0


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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1


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160 180 200 220 240

%Ox

After Dilut


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22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37440 460 480 500 520 540 560 580 600 620 640 660 680 700 720 740

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0.06 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00.07 0.06 0 0 0 0 0 0 0 0 0 0 0 0 0 00.07 0.07 0.06 0 0 0 0 0 0 0 0 0 0 0 0 00.07 0.07 0.07 0.059 0 0 0 0 0 0 0 0 0 0 0 00.07 0.07 0.07 0.074 0.06 0 0 0 0 0 0 0 0 0 0 0

0.07 0.07 0.07 0.074 0.07 0.06 0 0 0 0 0 0 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.06 0 0 0 0 0 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.07 0.06 0 0 0 0 0 0 0 0

0.07 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 00.07 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 00.06 0.07 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0

0 0.06 0.07 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.06 00 0 0.06 0.074 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.060 0 0 0.059 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07


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0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07

0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.07 0.07

0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0.06 0.07 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0 0.06 0.070 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.060 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1


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24/45

38 39 40 41 42 43 44 45 46 47 48 49 50760 780 800 820 840 860 880 900 920 940 960 980 1000

0 0 0 0 0 0 0 0 0 0 0 0 0 Sum0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 1

0.06 0 0 0 0 0 0 0 0 0 0 0 0 1


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0.07 0.06 0 0 0 0 0 0 0 0 0 0 0 10.07 0.07 0.06 0 0 0 0 0 0 0 0 0 0 10.07 0.07 0.07 0.06 0 0 0 0 0 0 0 0 0 1

0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 0 0 0 10.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 0 0 10.07 0.07 0.07 0.07 0.07 0.07 0.06 0 0 0 0 0 0 1.003676

0.07 0.07 0.07 0.07 0.07 0.07 0.08 0.07 0 0 0 0 0 1.0135690.07 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.07 0 0 0 0 1.0310620.07 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.08 0 0 0 1.0576840.07 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.09 0 0 1.0954720.07 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.1 0 1.1472340.07 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.12 1.2169930.06 0.07 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.15 1.172875

0 0.06 0.07 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.15 1.099346

0 0 0.06 0.07 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.15 1.0258160 0 0 0.06 0.07 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.15 0.9522870 0 0 0 0.06 0.07 0.08 0.08 0.09 0.1 0.11 0.13 0.15 0.8787570 0 0 0 0 0.06 0.08 0.08 0.09 0.1 0.11 0.13 0.15 0.805228

1 1 1 1 1 1 1 1 1 1 1 1 1 50


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BLOCK CAVE-BL

Input Parameters to Compute Block Cave ProductivityHeight of draw (m) 200 Note: The main difference betweBlock Specific Gravity (t/m3) 2.65 closes draw points from the begiDays per year 365 draw point start to close after a feDesired Production Rate (t) The models below also assumeDraw rate (m/yr) 65 model will a variable HOD as wellDevelopment rate (m2/yr) 45900 45900Layout footprint (m2) 1134000 1134000K 3.1

Continuos Modelt Newt At Xt Tons

0 0 - - -1 45900 45,900 14,918 7,906,2752 45900 76,883 24,987 13,243,0113 45900 97,796 31,784 16,845,3074 45900 111,912 36,371 19,276,8575 45900 121,441 39,468 20,918,1546 45900 127,872 41,559 22,026,0297 45900 132,214 42,970 22,773,8448 45900 135,144 43,922 23,278,6209 45900 137,122 44,565 23,619,343

10 45900 138,458 44,999 23,849,33211 45900 139,359 45,292 24,004,57412 45900 139,967 45,489 24,109,36213 45900 140,378 45,623 24,180,09514 45900 140,655 45,713 24,227,83915 45900 140,842 45,774 24,260,06616 45900 140,968 45,815 24,281,82017 45900 141,054 45,842 24,296,50318 45900 141,111 45,861 24,306,41519 45900 141,150 45,874 24,313,10520 45900 141,176 45,882 24,317,621

21 45900 141,194 45,888 24,320,66922 45900 141,206 45,892 24,322,72723 45900 141,214 45,895 24,324,11524 45900 141,219 45,896 24,325,05325 32400 127,723 41,510 22,000,31126 0 86,213 28,019 14,850,210


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CK PRODUCTIVITY

n the discrete model and the continuos model is that the formerning of the mining as a proportion of the active area. This is not true in real life becausew years of production startedonstant height of draw and constant development rate in a more accurateas development rate will be desired.

Discrete ModelAt Xt Tons Avg. Tons TPD

- - -45,900 0 7,906,275 3,953,138 10,83191,800 0 15,812,550 11,859,413 32,492

137,700 0 23,718,825 19,765,688 54,153183,600 45900 31,625,100 27,671,963 75,814183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644

183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644

183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644183,600 45900 31,625,100 31,625,100 86,644170,100 45900 29,299,725 30,462,413 83,459124,200 45900 21,393,450 25,346,588 69,443

-

5,000,000

10,000,000

15,000,000

20,000,000

25,000,000

30,000,000

35,000,000

Tons


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Time

Mod_Dif

Mod_disc


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BLOCK CAV

Input Parameters to Compute Operating CostsProduction Rate (Kt/d) 25Operating Cost ($/t) 3.34

Operating Costs Max Min

Extraction costs ($/t)Pre undercutting caving 1.2 1

Advanced undercutting 2.4 2Traditional undercutting 1.9 1.4

Haulage Costs ($/t)

Trains and trucks 1 0.3

Operating Costs Distribution ($/t)Labour 0.935Maintanance 0.635Maintanance Services 0.334Operating supplies 0.468Parts and supplies 0.568

Mine services 0.334Administration 0.033Others 0.033

1.8

2.3

2.8

3.3

3.8

4.3

4.8

5.3

0

OperatingCost($/t)

0

0.2

0.4

0.6

0.8

1

1.2

0

OperatingCosts($/t)


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-BLOCK PRODUCTIVITY

2.61 130

3.74 24

2.8 372.8 253.2 21

3.42 242.7 41

4.8 14.6

2.58 45

3.3 25

2.77 30.372

Operating Costs DistributionLabour 0.28

Maintanance 0.19

Maintanance Services 0.1

Operating supplies 0.14Parts and supplies 0.17Mine services 0.1Administration 0.01Others 0.01

y = -0.803ln(x) + 5.9259

20 40 60 80 100 120 140Production Rate (Ktpd)

0.2 0.4 0.6 0.8 1 1.2

Mine Production Rate (tpd)

#REF!

#REF!


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BLOCK CAVE- MINE PR

Parameter Unit Quantity

Strike dimension of the block(S) m 500

Width dimension of the block(W) m 313

Drawbell separation (B) m 17.25

Production drifts separation (A) m 34.4

Crown pillar UCL/Prodlevel (t) m 18

Undecut height (l) m 15

Production drift width (w) m 4

Production drift height (u) m 4.5

Ore passes spacing (s) m 150

Intermediate level under prod level (L) m 15Haulage level distance (h) m 45

Main Mining Levels Include

Undercut Level 1

Production Level 1

Ventilation Level 1

Intermidiate Haulage/Reduction Level 0

Haulage Level 1

Construction Unit Factor

Production area (A*B) m2 593.4

Undercut Level Unit Factor Dimentions Unit Cost Total CostAcceses m/m2 0.0104 4,0x3,6 $/m 1541 16.0UCL drift m/m2 0.0291 4,0x3,6 $/m 1541 44.8

Undercut (Drill-Blast-Muck) m3/m2 15.0000 $/m3 7 101.0

Production level road bed material m/m2 0.0291 $/m 621 18.1

Sub Total UCL cost $/m2 179.8

Production Level Unit Factor Dimentions Unit Cost Total CostAcceses m/m2 0.0104 4,5x4,5 $/m 2500 26.0

Production drift m/m2 0.0291 4,0x3,6 $/m 1541 44.8

Drawbell drift m/m2 0.0512 4,0x3,6 $/m 1541 78.9

Ore passes m/m2 0.0044 D=1.5-2.4 $/m 1400 6.2

Drawbell (Drill-Blast-Muck) m3/m2 7.3483 $/m3 7 49.5

Production level road bed material m/m2 0.0291 $/m 621 18.1

Production drift support m/m2 0.0291 $/m 300 8.7Draw point support m/m2 0.0256 $/m 50 1.3

Rock breaker U 0.0003 $/U 225000 75.8

Sub Total UCL cost $/m2 309.3

Ventilation Level Unit Factor Dimentions Unit Cost Total CostAcceses m/m2 0.0104 3,0x3,0 $/m 934 9.7

Ventilation drifts m/m2 0.0291 3,0x3,0 $/m 934 27.2

Ventilation raises m/m2 0.00290698 D=1 $/m 1500 4.4

Sub Total Ventilation Level $/m2 41.2

Primary size reduction Level Unit Factor Dimentions Unit CostAcceses m/m2 0.0000 4,1x4,0 $/m 1900 0.0

Reduction drifts m/m2 0.0000 4,1x3,6 $/m 1600 0.0

Grizzly area m/m2 0 0000 4 5x4 5 $/m 2500 0 0


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Dimension Unit Cost $/m

2,0x2,0 6712,5x2,5 7212,6x2,6 7173,0x3,0 9343,3x3,3 1,1853,6x3,6 1,5924,0x3,6 1,5414,1x3,6 1,600

4,1x3,9 1,8004,1x4,0 1,900

4,2x3,8 1,850

4,2x4,0 2,0004,2x4,2 2,1004,5x4,5 2,5005x4.9 2,600


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BLOCK CAVE- VEN

Ventilation Requirements Based on Production RateProduction Rate (tpd) 40,000Required air flow (cfm) 1,251,889

0

1,000,000

2,000,000

3,000,000

4,000,000

5,000,000

6,000,000

0 20,0

AirFlow

(cfm)


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TILATION

tpd cfmTeniente 126,000 4,800,000DOZ 43,000 1,300,000Salvador 25,000 850,000Bingham 72,000 1,500,000

y = 562510e2E-05xR = 0.9614

00 40,000 60,000 80,000 100,000 120,000 140,000

Production Rate (tpd)


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BLOCK CAVE- MIN

Quick Estimation Capital Costs M$ Units Quantity

Mining Reserves Mt 150Mining Capital Cost M$ 171

Shafts Units Face Area (m2) Length (m) Cost ($/m2)Main Access 1 54 1000 13,220Ventilation 2 43 1000 11,700Production 1 43 1000 11,700

Sub Total Shafts

Horizontal Development Units Face Area (m2) Length (m) Cost ($/m2)Main Access 2 5x4.9 2000 2600

Ventilation 1 3,3x3,3 1500 1185

Production 0 4,5x4,5 2000 2500

Sub Total Hz Development

Block Preparation Costs Units Hydraulic Radius (m2) HOD(m) Cost ($/m2)Preparation costs 1 60000 350 893

Total Mine Development (M$)

Capital Cost DistributionOperation and Maintanance 19% 19.59Suplies 12% 11.96

Labour 36% 36.84Administration 24% 24.50Others 9% 9.29

On Going Capital EstimationDevelopment rate m2/yr 12000Block Preparation Cost $/m2 900


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On going Capital $/yr 10.8


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E DEVELOPMENT

Total Cost (M$) Face Area Costs ($/m2)13 43 11,70012 48 12,30012 54 13,220

37

Dimension Unit Cost $/m

Total Cost (M$) 2,0x2,0 6715.2 2,5x2,5 721

1.7775 2,6x2,6 7175 3,0x3,0 934

3,3x3,3 1,18511.9775 3,6x3,6 1,592

4,0x3,6 1,5414,1x3,6 1,600

Total Cost (M$) 4,1x3,9 1,80053.58 4,1x4,0 1,900

4,2x3,8 1,8504,2x4,0 2,0004,2x4,2 2,100

102 4,5x4,5 2,5005x4.9 2,600

y = 1.2791x - 21.026R = 0.8796

0

100

200

300

400

500

600

0 50 100 150 200

CapitalCost(M$)


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250 300 350 400Reserves (Mt)


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BLOCK C

Input Parameters for NPV EstimationInitial capital cost (M$) 250Yearly discount rate (%) 0.1Revenue factor ($/t) 4Preparation costs ($/m2) 800Mine Horizon (Yrs) 15Height of draw (m) 250Development rate (m2/yr) 30000Draw rate (t/m2_day) 0.5

Specific gravity (t/m3) 2.6Revenue reduction factor 0.076Revenue 78Preparations 240

NPV estimation (M$) 781.8


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VE- NPV ESTIMATION


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BLOCK CAVE-

Parameter Unit QuantityBlast holes length minimum m l/2Ring spacing m dNumber of blastholes per ring nDistance to drill along the UCL drift m BArea to blast m2 A*BUndercut height m l

Number of rings B/dFactor m/m3 3/A

Dist. Bet. Prod. Drifts (A) m 35Density of Explosive t/m3 1.7Drillhole diameter m 2.5Rock Density t/m3 2.7

LHD productivity t/hr 180Haulage productivity t/hr 60

Activity Unit Factor Cost Unit Total CostUCL drilling m/m3 0.085714 12 $/m 1.03

Blasting Kg/m3 0.000461 4 $/Kg 0.00Loading and dumping hr/m3 0.015 200 $/hr 3.00Haulage hr/m3 0.045 60 $/hr 2.70Others 0.50

Total $/m3 6.7


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UNDERCUT DETAIL


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Shafts Face Area Costs ($/m3 43 11700

4 48 12300Shafts Number Length Face Area 5 54 13220Main Access Dimension Unit Cost $

Ventilation 2,0x2,0 671Production 2,5x2,5 721Addits 2,6x2,6 717Main Access 3,0x3,0 934Ventilation 3,3x3,3 1,185Production 3,6x3,6 1,592

4,0x3,6 1,5414,1x3,6 1,600

Operating Costs Components 4,1x3,9 1,80020000 30000 45000 4,1x4,0 1,900

Equipment operation 0.92 1.05 1.17 4,2x3,8 1,850Suplies 0.67 0.65 0.61 4,2x4,0 2,000Hourly labor 2.2 1.98 1.78 4,2x4,2 2,100Administration 1.53 1.29 1.15 4,5x4,5 2,500Others 0.53 0.5 0.47 5x4.9 2,600Total 5.85 5.47 5.18

Costs Components

Operation and Maintanance 16% 19% 23% 19%Suplies 11% 12% 12% 12%Hourly labor 38% 36% 34% 36%Administration 26% 24% 22% 24%Others 9% 9% 9% 9%


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