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Publikováno v:
Journal American Society of Mining and Reclamation. 2006:1483-1494
Grootvlei Mine is located in the Far East Rand Basin, part of the Witwatersrand Basin, which has been actively mined for over 100 years. In order to maintain access to its reserves, Grootvlei dewaters approximately 75 Ml/day from its workings. The wa
Publikováno v:
Journal American Society of Mining and Reclamation. 2006:2281-2288
Arbor Colliery is an abandoned colliery in the Loskop Dam catchment. The mine comprises a series of opencast pits, as well as poorly defined underground workings. The water within the opencast pits shows high levels of acidity, elevated sulfate level