Mopani Copper Mines – Ventilation Shaft Grouting – Kitwe, Zambia, 2018-2019 Sovereign performed grouting of the Synclinorium Primary Ventilation Shaft at Kitwe, Zambia. This shaft was designed and constructed with the ventilation fans installed at the surface. There was water ingress into the shaft at various horizons in the upper 120m from surface, and the […]
June 26, 2019
British Coal – Whitemoor Mine. No 2 shaft. (Cementation Mining Ltd. UK JV) – UK, 1997 Over a period of several weeks, the No. 2 Shaft experienced an increased water make from 90 liters per minute to over 410 liters per minute. SCEM66 was used to successfully reduce the total inflow to less than 15 […]
June 26, 1997
Normandy Golden Grove – Scuddles Mine – Up-Cast Ventilation Shaft – WA,1992-1993 The 350-meter deep Northern Up-Cast Shaft of this mine was raise bored to 4.1 meters diameter and, at time of completion, registered 1536 liters per minute of water ingress. Apart from excessive pumping costs, this large volume in the shaft decreased fan efficiency […]
June 26, 1993
Gwithian Outfall Shaft, Penzance – Cornwall, England The new Penzance/St. Ives Sewerage Scheme in Cornwall required the sinking of a 6.1-meter diameter shaft to a depth of 60 meters on the shore at Gwithian, to provide access to a 2.1 km long outfall tunnel to be driven out beneath St. Ives Bay. Initial ground support […]
June 26, 1990
Pasminco Mining – Broken Hill South Mine (No. 5 shaft and Raise Bore Holes) – New South Wales (NSW), Australia, 1990 Broken Hill No. 5 Ventilation Shaft. During sinking of a new shaft, water entered the pilot hole at 300 liters per minute, despite a major cement grouting program from surface. Reaming of the pilot hole […]
June 26, 1990
Samancor – Waterkloof Mine raise bore holes – RSA, 1990 Late in 1990, the South-East and South-West 1.83-meter diameter ventilation raise bore holes intersected water at 40 liters per minute and 60 liters per minute, respectively. The water table cone of depression was of concern, because local residences were entirely dependent on groundwater for potable […]
June 26, 1990
West Driefontein Gold Mine, Vaal Reefs No 11 Shaft – Transvaal, RSA, 1990 Groundwater in dolomite was intersected from 100 meters to 600 meters depth. At 600 meters, the inflow into the shaft was 624 liters per minute. After 60 days of sealing, the inflow was reduced to 138 liters per minute, allowing normal shaft […]
June 26, 1990
Northam Platinum Mine – No 1 shaft – Transvaal RSA, 1989 During November 1988 the sinking crew at No. 1 Shaft reported intersecting water in a pilot hole at 4 level plat development. Attempts to pump cementitious grout via a telescopic packer proved unsuccessful. Drilling of additional pilot holes, together with the grouting program, fractured […]
June 26, 1989
Monktonhall Colliery – Scotland Shafts 1 and 2 – Scotland, 1988 A large network of flooded and abandoned workings were causing a rise in ground water levels and leaking into the operating section of Monktonhall Colliery. An extensive cement grouting program was tried but failed to stop the increasing inflows. Some 220 tons of cement […]
June 26, 1988
