application of a tsl in declines at mponeng mine canada tsl prese… · presentation outline...
TRANSCRIPT
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Application of a TSL in declines at Mponeng Mine
AngloGoldAshanti
Riaan Carstens
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Presentation Outline
Introduction
Overview of Project
What is a TSL?
Application Equipment
Strength Tests
Cost Comparison
Conclusions
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U.S.A.
TanzaniaBrazil
ArgentinaSouthAfrica
NamibiaAustralia
Mali
Global Operations
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AngloGold Ashanti SA Operations
ErgoErgoWestern UltraDeep Levels
TauTonaTauTonaSavukaSavuka
MponengMponeng
Tau LekoaTau Lekoa
Great NoligwaGreat NoligwaKopanangKopanang
Moab KhotsongMoab Khotsong
WITWATERSRAND BASIN
Witwatersrand Basin
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Mponeng - History
Mponeng
“Look at me”
Shaft commissioned in 1986
Sub-shaft commissioned in 1993
All mining is done on the VCR
horizon down to 120 Level
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Mining Layout
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Project Area
4.5 KM3.5
KM
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Ounces Profile
0
100
200
300
400
500
600
700
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024Years
BP 07 - Base BP 07 - Above 109 LevelBP 07 - Below 109 to 120 Level BP 07 - Below 120 Level
Above 109 Level
Below 109 level to 120 level
VCR B120 Project
Oun
ces
‘000
• Reserves 2.7 Million Oz• Gold 85 Tons• Project Duration 66 Months
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Vertical section through Mponeng
Ventersdorp Contact reef
CL reef
SS1 SS2
SSV
Main Service/Vent
83 Level -2 253
120 Level -3 372
Shaft bottom -3 461
900m
123 Level
126 Level -3 572
VCR B120project area
Decline bottom -3 604 m below collar - 3 880 m below datum
109 Level -3 037
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Declines
Four declines120 to 126/127
126 level
120 level infrastructure
123 level
SS1 #SS2 #
Mponeng southern lease boundary
• Decline 1: 997 m down• Total m : 2200 m• 3777.473m BS
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What is a TSL?
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Application Equipment
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Application Equipment
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Strength Tests - Tensile
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Strength Tests - Tensile
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Strength Tests - Bond
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Strength Tests - Bond
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Strength Tests – Bond Shear
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Strength Comparison
6.650.91Tensile (MPa)
10.751.38Bond Shear (MPa)
5.20Bond Strength (MPa)
5mm TSL50mm Gunnite Criteria
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Total Cost Comparison – (ZAR Million)
29.16 53.50 Total
4.2111.23Maintenance Cost
4.417.96Labour Cost
18.5722.01Material Cost & Transport
1.9712.31Capital Cost
TSL 5mmGunnite 50 mmDescription
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Unit Cost Comparison – (ZAR/m2)
185.37 278.00 Total
30.3075.76Maintenance
29.7553.72Labour
1.269.08Transport
0.0020.77Additives
124.07118.68Material
TSL 5mmGunnite 50 mmDescription
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Cash Flow – (ZAR Million)Total cost outflows for support systems
0.00
5.00
10.00
15.00
20.00
25.00
2007 2008 2009 2010 2011 2012
Years
ZAR
Mill
ions
Total Wetcrete Cost Total TSL Cost
19.56 Difference
-41.09NPC10 Gunnite
-21.53NPC10 TSL
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Decline photo’s
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Sidewall Fracturing
2.5m
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TSL photo’s
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TSL photo’s
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TSL photo’s
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On-Reef Application
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On-Reef Application
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On-Reef Application
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Conclusions
No rock mass deterioration observed to date
TSL system is ZAR 19.56 Mill, $ 2.45 Mill less than gunnite
system based on a NPC10
Cannot compare support systems on direct cost only
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Questions