H E R R E N K N E C H T A G | U T I L I T Y T U N N E L L I N G | T R A F F I C T U N N E L L I N G
The Shaft Boring System for deep shafts.
Christian Frenzel
Santiago de Chile, April 16th, 2010
H E R R E N K N E C H T A G | U T I L I T Y T U N N E L L I N G | T R A F F I C T U N N E L L I N G
Rio Tinto – Mine of the FutureTM
Program unveiled in Jan. 2008
Create next generation technologies
Block Cave Mining Method -Resolution Copper and Oyu Tolgoi
Significant underground infrastructure prior to ore production.
Aim - improve safety and speed of constructing underground
infrastructure (shafts and tunnels).
Civil tunnelling industry partners, contractors, and Rio Tinto
Herrenknecht is our partner in shaft construction
We are pleased to have this opportunity to present this
breakthrough to the mining community
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HERRENKNECHT AG.
3,700 Employees Worldwide
Schwanau, Germany
Guangzhou, China
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Product Range.
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Accessing Deep Ore Bodies: Requirements.
Vertical shafts (ventilation and production)
Inner diameter: 10-12 m
Depth: up to 2000 m
Geology: hard rock
Conventional ground support
Increased safety
Increased shaft construction rate
H E R R E N K N E C H T A G | U T I L I T Y T U N N E L L I N G | T R A F F I C T U N N E L L I N G
New Shaft Boring System for Deep Shafts in Rock.
Approach for new concept
Team approach Rio Tinto – shaft contractor
Use of existing technologies wherever possible
Best possible access to bench area
Full set of rock support options
Possibility for pre-excavation grouting
H E R R E N K N E C H T A G | U T I L I T Y T U N N E L L I N G | T R A F F I C T U N N E L L I N G
Existing Shaft Boring System for Shallow Shafts in Soils And Soft
Rock.
Dredging type submerged
operation, partial face excavation
Hydraulic muck transport
Precast segmental lining
70 – 100m depth
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Key Element for Mechanized Shaft Sinking
→ Rock Excavation And Muck Removal
Disc cutters for partial
face rock excavation
Muck removal by buckets
and muck chutes
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Rock Excavation And Mucking Process.
H E R R E N K N E C H T A G | U T I L I T Y T U N N E L L I N G | T R A F F I C T U N N E L L I N G
Shaft Boring System (SBS).
Cutterhead (1)
Dust shield (2)
Rock bolters (3)
Gripper system (4)
Vertical conveyor (5)
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Mining Cycle.
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SBS: Cross Section.
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SBS Mucking System.
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Health Safety: Workplaces.
S1: Below dust shield
Permanent: none
Only occasional activities
S2: Main beam area
Permanent: rock bolting
Occasional: cutter changing
S3: Infrastructure platforms
Permanent: SBS operator
SBS infrastructure
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Summary
Rio Tinto and Herrenknecht partnership for Shaft Boring System
development
Concept development finished, detail engineering started
Test site to be fixed in the near future
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