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On Jan 1, 2008 S.M. Spottiswoode (and others) published: Exploring the possibility of mining the stabilising pillars in South African gold mines
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gold mining headgear ... A South African gold mining company owned by members of the Mandela ... coal preparation by size in under ground longwall mining. ...
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gold and platinum. South Africa is also a world South Africa's mining industry was the largest Chamber of Mines Statistics South Africa South African
The key elements of longwall mining in hard rock are illustrated in ... the effects of rockbursts in a haulage in a South African gold mine was described in
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