| OWNER, CONSULTANTS AND REFERENCE |
LOCATION AND DESCRIPTION |
SCOPE |
NOTES |
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Rand Mines Properties Ltd.
Ref: B. Richards
Rand Mines. |
Marikana, (near Rustenburg).
Reopening of the 10 degree incline.
Duration: 4 months
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Length: 150m
Gradient: 10º
Dimensions: 4m w. x 2,5m h.
Cross section: 9m2
Lining: Timber sets. |
The shaft was filled with water. It had to be dewatered and new concrete floor cast and equipped with fails and services. |
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Montrose Mine Decline
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Phalaborwa In Pit Crusher Project
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Gencor.
Eng: Gencor
Ref: H, Smith
Chief Operations, Gencor. |
Montrose Mine, Steelpoort.
1000m Decline shaft; 4 stations; 400m f/wall drives; 150m raises and equipping of shaft and stations.
Duration: 30 months
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Length of decline: 800m
Dimensions:
5m x 2,75m h
Cross section area: 11,8 m2
Inclination: 12º
Concreting of floor and rails installed.
Total length drives: 400m
Dimensions:
2,5m x 2,5m
4 stations and 150m raises. |
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East Rand Proprietary Mines Ltd.
Eng: ERPM
Ref:
H.E. von Antwerpen, GM. |
Boksburg, Gauteng.
41 level haulage 1 000m deep on the East Shaft which had been partially excavated by the mine.
Duration: 24 months
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Dimensions:
4,5m x 4,95m
Cross section: 15 m2
Length: 3 500m
Gradient: 1 in 200
Excavation method:
Drill and blast |
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Middlebult Colliery.
Eng: Keeve Steyn.
Ref: P. O’Dell
KSI |
Secunda, Transvaal.
Design and construction of six grout plugs to seal panels against the ingress of water.
Duration: 6 months |
6 x grouted, steel reinforced panels 6m x 3,5m in cross section x 3,5m thick. |
Grout mixture of 2 sand; 1 cement pumped from surface through 25mm column 1 200m long. |
Middlebult Colliery.
Eng: Keeve Steyn.
Ref: P. O’Dell |
Secunda, Transvaal.
Design and construction of thirty grout plugs to seal panels against the ingress of water.
Duration: 4 months |
30 x grouted, steel reinforced panels 6m x 3,5m in cross section x 0,6m thick. |
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Phalaborwa Mining Company.
Eng:
Fluor Engineers (SA) Pty Ltd.
Ref:
Fluor Eng.
S. W. Robinson. |
Phalaborwa, Northern Transvaal.
In Pit Crusher and Conveyor Project.
Excavation of decline including concrete floor; Crusher chamber and access drifts to intersect decline.
Duration: 12 months
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Decline length: 1 043m
Gradient: 15,5º
Dimensions: 5m w. x 3,5m h.
Cross section area: 15,28m2
Crusher chamber: 13 900m3
Depth: 35m
Supports: Rockbolts; mesh and shotcrete.
Excavation method:
Drill and blast. |
Constructed in joint venture with Clifford Harris (Pty) Ltd.
A record was achieved for decline shaft excavation. |
Anglo American De Beers/ Falconbridge Joint Venture.
Eng: Anglo American.
Ref: De Beer Prospecting, Bots. Dr Loney. |
Gope- Central Kalahari District, Botswana.
GOPE PROSPECT SHAFT.
Erection of headgear and winder and sinking and equipping of (include. Sets) prospect shaft and drives.
Duration: 7 months
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Vertical shaft: 150m deep
Shaft dimensions:
1,8m x 2,8m finished.
Drives dimensions:
2,5m x 3m x 200m long
Excavation method:
Drill and blast.
Equipping shaft steel sets, ladderways and services |
Constructed in joint venture with LTA Construction. (50%) |
Sasol Operation (Pty) Ltd.
Secunda Colliery.
Eng: K.S.I.
Ref: Mr J Botha
Proj. Eng. |
Middlebult Mine, Secunda, Transvaal.
RAISEBORING OF ONE VENTILATION SHAFT.
Duration: 12 months
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Raisebore shaft to 1,8m diameter, slipe to 4,8m diameter and concurrently line with concrete.
Depth: 140m |
Constructed in joint venture with LTA Construction. (50%) |
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Gope Prospect Shaft - Botswana
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Middlebult Mine - Concrete lining for 6m dia. shaft
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Sasol Operation (Pty) Ltd.
Secunda Colliery.
Eng: K.S.I.
Ref: Mr J Botha
Proj. Eng. |
Middlebult Mine, Secunda, Transvaal.
RAISEBORING AND SLIPING OF ONE VENTILATION SHAFT.
Duration: 7 months
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Raisebore shaft to 1,8m diameter, from 130m below surface. Sliped to 6m diameter with material gravitated to shaft bottom and mucked out of tunnel below with LHD. Concrete lined.
Depth: 127m |
Constructed in joint venture with LTA Construction. (50%) |
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Pipe being lowered into shaft to consolidate section in poor ground - Bosjesspruit Vent Shafts.
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Gloria Shaft – Decline approach cut
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Sasol Operation (Pty) Ltd.
Secunda Colliery.
Eng: K.S.I.
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Bosjespruit Mine, Secunda, Transvaal.
RAISEBORING OF TWO VENTILATION SHAFTS.
Duration: 6 months
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2 shafts at 175m deep. Raisebore shafts, slipe to 3,85m diameter.
Concrete lining – both shafts were carried out using a continuous slip-form method (first time used in a long shaft underground) |
Construction in Joint Venture with LTA Construction (50%)
Very poor ground conditions were encountered in one of the shafts causing fall of material from the vertical walls 110m from surface. Section was consolidated by means of a custom fabricated steel pipe, equipped with grouting outlets |
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Gencor
Eng: Gencor
Ref: J. McFarlane
Project Manager |
Blinkpan Colliery, South Eastern Transvaal.
GLORIA SHAFT.
Vertical vent shaft and decline shaft construction.
Duration: 14.5 months |
Decline dimensions:
7m x 4m high x 1 000m
Vert. shaft:
8m diameter x 150m deep.
Supports:
Rockbolts; shotcrete. |
Extensive emergency design and consolidation work, carried out from surface. Drilling and installation of cable tendons and pumping of concrete to a custom designed shutter in decline pre-fixed with reinforcing, to support incompetent ground. |
lconbridge
Inv. Zimbabwe.
Eng: V.E.L.
Ref: W.Taylor, VEL. Chinoy,
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Zimbabwe.
Golden Kopje Mine
SINK AND EQUIP AR SHAFT.
Duration: 6 months |
Sink, concrete line and equip buntons; ladderway and services 80m deep; 4,32m dia lined circular vertical shaft.
Method: Sinking |
Shaft hole through into existing sub vertical shaft |
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Amplats Management Services
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Bafokeng Rasimone Platinum Mine, R.S.A
Duration: 6 months (incl TBM shipping etc)
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2 m diameter reef raise x 350m long at 14º inclination.
Inclination peaked at 17º at places. |
First time a TBM used for reef raising. The trial proved viability of technology in platinum mines. |
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BRPM – View of TBM boring platinum reef raises
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Kinross Holdings
Blanket Mine
Manager:
Mr C. Mangezi
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Blanket Mine – Gwanda, Zimbabwe
No. 4 Shaft Lining and Equipping
Duration: 11 months
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-Existing 800m deep shaft to be equipped with buntons, guides, travelling way and pipes.
-Top 100m to be concrete lined.
-Scope includes for stripping of existing guides, buntons, Hway and pipes and the installation of shaft bottom loading station complete with spillage arrangements and detailed design drawing. |
Main Contractor |
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Blanket Mine - No 4 Shaft Headgear
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Harmony Gold Mining Company Limited.
Project Manager: Peter O’Toole
Project Leader: Kobus Le Roux
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Evander Gold Mine, Evander, Mpumalanga
No. 8-shaft, 17 to 24 level Ventilation shaft Support Project
Duration: 10 months Completed: July 2010
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Design and establish shaft stage, stage winding gear, kibble winder, u/g headgear, bank steelwork to two collars, rockbolting equipment, shotcrete mixing, transporting
and spraying equipment and services.
Rock support with 1.5m x 20mm rock-bolts and 100mm thick fibrecrete lining of 415m x 4.5m diameter raise-bored ventilation shaft.
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Support Quantities:
• 2300No rockbolts
• 5900m2 100mm thick 40Mpa fibrecrete
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Harmony Gold Mining Company Limited
Project Leader: Kobus Le Roux
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Evander Gold Mine, Evander, Mpumalanga
No. 8-shaft, Development of 17 level airways.
Duration: 8 months Completed: September 2011
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Approximately 500m of 12m2 horizontal raise development including excavations / sliping of raisebore, fan, transformer and bulk air cooler chambers.
Equipping with tracks, ventilation services piping.
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Conventional tracked development. Rock support: 2.2m long bolts in a 1 x 1m pattern. |
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Harmony Gold Mining Company Limited
Project Leader: Kobus Le Roux
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Evander Gold Mine, Evander, Mpumalanga
No. 8-shaft, No. 17, 18 & Ventilation Shaft Equipping.
Duration: 6 months Completion: Current
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The Installation of 450m deep shaft support buntons, compressed air pipes, chilled waterpipes with lagging, dirty water pipes and cables.
Stage and kibble modifications.
Installation of penthouse.
Installation of appros. 4.5km on levle chilled water, condenser water and compressed air pipes on 17 & 18 level.
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Harmony Gold Mining Company Limited
Project Leader: Kobus Le Roux
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Evander Gold Mine, Evander, Mpumalanga.
No. 8-shaft, Ore pass rehabilitation between 13 and 14 level.
Duration: 5 months Completed: current
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Main Shaft Ore Pass rehabilition between 13 and 14 levels, including the creation of dead boxes.
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Caledonia Mining Corporation.
Blanket Mine
Manager: Mr. C Mangezi
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Blanket Mine - Gwanda, Zimbabwe
No. 4 Shaft Maintenance Works.
Duration: 3-4 months Completion: current
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Maintenance and repair works to No. 4 Vertical Shaft Steelwork - 900m |
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Goldfields Shared Services
GFI Mining SA (Pty) Ltd
South Deep Joint Venture
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South Deep - 95L Decline Development at South Shaft
Duration: 12 months Completion: current
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95 Level, 800m, 8 degrees Trackless Decline development.
4.5m x 5m including support.
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Freeport-McMoRan Copper and Gold.
Tenke Fungerume Mining S.A.R.L.
General Manager: Richmond Fenn
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Tenke Fungerume Mine - Katanga Province, Democratic Republic of the Congo.
Excavation & Support of Prospect Shaft and Tunnel.
Duration: 10 months Completion: current
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Design and construction of surface RC collar and foundation.
Temporary Works design and installations including headgear, kibblewinding gear, stage winding gear etc.
Excavation, support of a 3m dim. vertical shaft from surface to a depth of 68m.
Excavation of 220m gallery for sampling.
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