trans-siberian gold plc
DESCRIPTION
TRANS-SIBERIAN GOLD PLC. 26 June 2013 Annual General Meeting . TRANS-SIBERIAN GOLD. ASACHA – Underground Mine. TRANS-SIBERIAN GOLD. ASACHA Processing plant. ASACHA Refining and sales. TRANS-SIBERIAN GOLD. JORC Resource Estimate following 2012 Asacha exploration programme. - PowerPoint PPT PresentationTRANSCRIPT
TRANS-SIBERIAN GOLD PLC
26 June 2013Annual General Meeting
TRANS-SIBERIAN GOLD
ASACHA – Underground Mine
2011 2012Q1
2013April2013
May 2013
YTD 2013
Mine development (metres)
3,481 4,124 396 266 298 960
Ore extracted (tonnes)
34,537 127,646 45,352 16,289 16,121 77,762
TRANS-SIBERIAN GOLD
ASACHA Processing plant
2011 2012Q1
2013April2013
May 2013
YTD 2013
Ore processed (tonnes)
30,308 136,154 35,585 10,006 14,235 59,826
Gold grade (g/t) 9.35 6.54 6.36 6.79 6.27 6.41
Silver grade (g/t) 15.66 11.79 9.80 12.20 10.51 10.37
Gold recovery (%)
94.2 95.41 94.52 93.86 93.23 94.11
Silver recovery (%)
61.8 68.49 78.81 68.74 69.21 74.69
Gold in dore (oz) 7,833 27,920 6,826 2,025 2,621 11,472
Silver in dore (oz)
8,596 35,924 8,791 2,412 3,168 14,371
ASACHA Refining and sales
2011 2012Q1
2013April2013
May 2013
YTD 2013
Gold refined (oz)
6,539 27,588 6,833 1,578 2,748 11,159
Silver refined (oz)
7,189 35,110 8,865 2,106 3,245 14,216
Gold sales US$mill
11.7 43.9 12.6 2.5 4.1 19.2
Silver sales US$mill
0.2 1.0 0.3 0.1 0.1 0.5
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JORC Resource Estimate following 2012 Asacha exploration programme
• 11,000 metres drilled on Asacha’s flanks in 2012
• Asacha JORC resource update adds 321,000 oz. gold and 703,000 oz silver, net of 2011 and 2012 production (252,000 oz. of gold and 395,000 oz. of silver in Asacha’s Eastern zone identified in 2012)
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JORC Resource as at 31 December 2012
PROPERTY
MEASURED +
INDICATEDOz
MEASURED,INDICATED &
INFERREDOz
GRADEg/t
(Au equiv.)
CUT-OFFg/t
Asacha 748,100 1,070,300 20.9 4.0
Rodnikova 166,450 404,845 8.2 4.0
TOTALS 914,550 1,475,145 - -
Asacha mine
• Daily output of 500-600 tonnes of ore ensures continuous operation of the plant
• Processing plant throughput is close to the designed 12,500 tonnes of ore per month
• Major issue of concern – low grades and high dilution
2012 major issue of concern:low grades and high dilution
– fractured and fragile enclosing rocks in blocks close to surface
– design disadvantages:• long hole blasting inappropriate for some
parts of the mine• blasting scheme unsuitable for some blocks
– shortcomings in earlier mine development:• advanced block preparation• inadequate and timely supporting
– lack of underground machines– lack of experienced personnel
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Measures taken following 2012 technical audit
• New technical and managing staff – Technical director and Chief mine geologist, each with around 30 year practical experience
• Measures to keep mining blocks’ integrity– minimise time lag between preparation of mining blocks and subsequent stoping– use rock drifts when preparing blocks for stoping
• Measures to reduce dilution- short blocks stoping, recoverable protective pillars and supporting concrete pillars/ceilings, where appropriate - changes in blasting scheme, including drilling blasting holes parallel to the ore body, shallow blast-hole blasting where appropriate, less brisant explosives and drilling blasting holes with smaller diameters- smaller machines (scrapers and LHD)- stricter control on ore blasting and haulage to reduce volume of ore stored underground
• Optimisation of work shifts
• More attention to ore sampling, stockpiling and blending
• VNIPI design institute to revisit Asacha in near future
The aim – to achieve 8 g/t gold grade by the end of 2013 and 9 g/t by mid 2014
New underground machines
• BU-80 rig with smaller diameter (65-75 mm instead of 105 mm)
• Two underground LHD : Fambition FAML-3 and Atlas Copco ST2D
• Underground truck Fambition FAMT-12T
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Asacha mine in operation (1)
Asacha mine in operation (2)
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Construction continued at site
Post start-up major activities
Mine site: Main fan is constructed, testing with participation of the manufacturer is planned.
Plant: Ready for commissioning. Documentation in progress.
Tailings storage facility: In operation. Documentation for commissioning in progress.
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Key facilities already commissioned:
•Cyanide storage•Explosives storage•Power unit and power supply system•The camp
Rodnikova Deposit
• Federal authorities prescribed the implementation by April 2014 of two provisions of the Licensing Agreement:– Finalisation of the design
documentation– Commencement of work at
the deposit• The pre-feasibility study will
be finalised in 2013
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