Pike River Coal Mine ACARP Presentations August 2008 Peter Whittall – General Manager, Mines PIKE RIVER COAL
Pike River Coal Mine
ACARP Presentations August 2008
Peter Whittall – General Manager, MinesPIKE RIVER COAL
PIKE RIVER COAL Project Overview
• High value hard coking coal (HCC) – used for steelmaking
• NZ $240m project – fully funded
• 70% of coal sold for first 3 years – 55% for life of mine
• 1 million tonnes for 18 + years
• HCC prices strong at US $300 per tonne
• Roadway development by roadheader and CM; Extraction by Hydraulic
Monitoring
PIKE RIVER COAL
Pike River Mine
Location Map
PIKE RIVER COAL
Greymouth
Greymouth
Wellington
Lyttelton
PIKE RIVER COAL
Cross Section of the Coal Seams
Paparoa Seam
Brunner Seam
PIKE RIVER COAL Tunnel Under Construction
Tunnel currently at Hawera Fault at 2,164m
Total Tunnel length 2,300m to coal seam
Portal September 2006 Tunnel Face Construction
PIKE RIVER COAL
Mine Plan• Seam thickness: 3 to 13m but typically 4
– 9m;
• Roadway development by Continuous Miner and Roadheader
• Coal extraction by Hydro Monitor system (9000 litres/minute)
• All coal haulage by water: In mine by open flume; pit bottom to CPP by 10.5km 11” pipeline (4000 litres/minute per machine)
• In-seam drilling to define geological structure and limits
• Seam-, strata- and fault-originating mine water
• Gas average 4m3/t across lease; up to 10m3/t at depth; no outburst
Mining Parameters
PIKE RIVER COAL Pit Bottom in Stone
•LHS: Fluming water; electrical
•RHS: Coal slurry bins; crushers; slurry pumps
•481m of stone excavation
•Max width: 8m
•Max Height: 11m
•Concrete: 600m3 of 50MPa; 170m3 of 10MPa
PIKE RIVER COAL Pit Bottom in Stone
•LHS: Fluming water; electrical
•RHS: Coal slurry bins; crushers; slurry pumps
•481m of stone excavation
•Max width: 8m
•Max Height: 11m
•Concrete: 600m3 of 50MPa; 170m3 of 10MPa
PIKE RIVER COAL
Seam Cross Section
Immediate Roof: Shales and coal rider seam
Upper Roof: Massive sandstone +100MPa
Floor: Interbedded shales and mudstones
Seam coring for Sulphur analysis
Seam dips 5o – 30o
PIKE RIVER COAL Pit Bottom in Coal
4m dia. X 108m shaft
Main Fans
Pike River Tunnel
Water storage roads
Raw Coal Ponds
PIKE RIVER COAL
Hydro Productivity(Excluding continuous miner and roadheader production)
•9,000 litres water/min
•3.6 t/min coal cutting rate
•40% Fluming density
•61.5% efficiency
•Shift productivity = 1,062t
•Daily productivity = 3,186t
•Annual productivity = 1.1Mt
Roadway and Extraction Productivity
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1
2
3
4
5
6
7
8
9
10
0 5 10 15 20
Roadway Grade (degrees)
Dev
elo
pm
ent
Rat
e (m
/sh
ift)
CM
RH
Continuous Miner v Roadheader Productivity
PIKE RIVER COAL
Roadheader (Waratah)
PIKE RIVER COAL
Roadheader (Waratah)
PIKE RIVER COAL
Roadheader (Waratah)
PIKE RIVER COAL
Roadheader (Waratah)
•Base Machine: Wirth T1.14
•Cutting Dimension: 6.6m wide x 4.4m high
•Shovel: 4m – 4.9m wide
•Gradients: Up to +/- 18o
•Custom deployment frame
•Floor pressure: 0.15MPa
•Total Power: 272 KW
PIKE RIVER COAL
Continuous Miner
PIKE RIVER COAL
Continuous Miner
•Base Machine: Wirth H4.40 Miner Bolter
•Cutting Height: 2.5m – 4.0m
•Machine/Cutting Width: 3.5m
•Tracks: 560mm width
•Floor Pressure: 0.2MPa
•Drill Rigs: ARO S2500 (2.4m)
•Rib Rigs: ARO S2500 (1.8m)
•Coal Sizer fitted
•Cross Levelling via tracks
PIKE RIVER COAL
Continuous Miner
PIKE RIVER COAL
Development Considerations
•No recent history in Brunner Seam
•Multinational experience, expectations, norms
•Coal roof, coal floor, 5 – 30o seam grades
•Setting challenging but realistic KPI values
•Data gathering and analysis
•New mining equipment to site (and market)
•Strata control system
•Coal clearance by water – no conveyors
•Hot seat change out? – 6.5km to amenities; 1.2km to portal; 2.3km to pit bottom
PIKE RIVER COAL
Mining Extraction by Hydraulic Monitor
Parameters for success:– Strong roof and floor– Strong but fractured coal– Moderate to thick seam
(3 - 13 metres)– Moderately dipping
seam (5° - 30°)– Good supply of water
(Pike has rainfall of over 6m/year in mine vicinity)
PIKE RIVER COAL
Sub-Rise Extraction
PIKE RIVER COAL
Sub-Level Extraction
PIKE RIVER COAL
Pike River Fly Over
PIKE RIVER COAL Production Timetable
Forecast to meet coal seam in late August 2008
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200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
2009 2010 2011 2012 2013
Year ended 30 June
Ton
nes
PIKE RIVER COAL
Project Summary
• NZ’s second largest coal export mine when at 1 Mtpa
• Premium quality hard coking coal at 1% ash
• Tunnel at 2,164m, through the Hawera Fault with coal in late September 2008
• Most surface infrastructure complete with train loadout commenced
• Major local employer with 65 full time staff now, 18 more due to commence, building to 150 at full production in mid 2009
• Transport system solution in place from coal face to port with all contracts let and underway
• $30 - $40M in local spend annually