john zeni - developments in mine shafts
TRANSCRIPT
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ENGINEERING
ENERGY
WATER
MARINE
MINING
TUNNELLING
Developments in Construction and Lining of Mine Shafts
by
John Zeni
10 September, 2015
25th Mechanical
Engineering Safety
Seminar
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COPYRIGHT
Please note that this document and the
information contained herein is the property of
Abergeldie Complex Infrastructure. It shall not
be reproduced, copied in part or in entirety, or
given to any individual without the prior written
consent of the Managing Director of Abergeldie
Complex Infrastructure
‘Providing the complex infrastructure needed to build a better community’
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‘Providing the complex infrastructure needed to build a better community’
PART 1: Introduction to Shaft Drilling
and Lining Methods
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Process for installing composite shaft
linings into a blind bored shaft
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‘Providing the complex infrastructure needed to build a better community’
Extremely heavy, watertight and pressure-bearing lining options can be
installed using blind boring methods and equipment.
6.2 m steel liner installation
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‘Providing the complex infrastructure needed to build a better community’
450 tonne rig floating 3,200 tonne assembly of 5.3 m ID composite lining
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Comparison with Other Shaft Construction Processes: Raise boring - requires underground access for muck removal, limited lining options, unsuitable
through poor ground conditions and cutter changes can be hazardous
‘Providing the complex infrastructure needed to build a better community’
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Other Shaft Construction Processes: Conventional Drill and Blast shaft sinking – hazardous work environment, costly in poor ground conditions
‘Providing the complex infrastructure needed to build a better community’
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‘Providing the complex infrastructure needed to build a better community’
Other Shaft Construction Processes : Down hole drills
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1990 Ballarat Goldfields access shaft
4.7 m diameter bucket sinking through
soft clay temporarily supported by a
heavy bentonite slurry.
Steel surface liner installation
PART 2: Evolution of mechanised shaft boring
in Australia, 25 years and beyond
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1990 Ballarat Goldfields access shaft with steerable Vertical Shaft Drill
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1993 Northparkes Mine
ventilation shaft
5 m dia. x 215 m deep
lifting capacity: 317 tonnes
drilling torque: 350,000 Nm
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‘Providing the complex infrastructure needed to build a better community’ 1994 Dartbrook Coal ventilation shaft - 4.9 m dia. x 187 m deep, lined to
4.4 m dia. Steel casing with removable bulkhead doors at 3 seam levels
lifting capacity: 150 tonnes
drilling torque: 350,000 Nm
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‘Providing the complex infrastructure needed to build a better community’ 1995 - Henty Gold Mine, Tasmania 3.1 m dia. to 405 m deep
underground access shaft
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1995 – 96 Osborne Mine: 3.7 m dia. x 570 m deep access shaft and
3.1 m dia. x 640 m deep ventilation shaft drilled concurrently
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1996 -97
BHP Tower Colliery
Vent Shaft No 3
5.8 m dia. down ream of
2.4 m pilot raise
fibrecrete lining with bolts and
mesh
thrust capacity: 300 tonnes
drilling torque: 500,000 Nm
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PART 3: New generation blind boring equipment and lining methods First shaft drilled using safer, larger drilling rigs, tools and drill pipe 2002 BHP Dendrobium Mine Vent Shaft No 1 4.25 m dia. x 186 metres deep remotely applied fibrecrete lining
lifting capacity: 350 tonnes
drilling torque: 700,000 Nm
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2003 - Springvale no. 3 ventilation shaft - 4.25 m dia. x 365 m deep,
lined with 3.5 m internal dia. concrete and steel composite casing.
The first of it’s type in Australia
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2006 – North Goonyella
Mains Ventilation shaft no 2
6.15 m dia. x 270 m deep
lifting capacity: 400 tonnes
drilling torque: 700,000 Nm
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2010 - Austar ventilation shaft
5.5 m dia. x 465 m deep
4.5 m dia. composite liner
lifting capacity: 450 tonnes
drilling torque: 750,000 Nm
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2015 - Appin Mine - 6.2 m dia. x 516 m deep with 5.5 m dia. watertight
composite liner weighing approximately 9,000 tonnes
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Part 4: Evolution of Safety in blind boring methods
Eliminating risk: Blind bored shafts are excavated and lined entirely from the
surface with no personnel having to enter the shaft or the mine
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Removing personnel from
hazards:
Abergeldie rigs can be
operated by remote control with
all the recognised benefits of
optimum vision and safety for
the operator and surrounding
personnel.
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The site safety management
tool kit of 25 years ago was
not nearly as extensive as
today
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‘Providing the complex infrastructure needed to build a better community’
References and acknowledgements: 1 Google Earth image of Douglas Park shaft site