oa Civil Engineering = Siviele Ingenieurswese - Economic solution to environmental and mining problems

Volume 5, Issue 7
  • ISSN : 1021-2000



An integrated water management strategy was applied to achieve both practical engineering and environmental objectives with regard to water control at the new Pullens Hope opencast coal mine Opencast collieries on the Eastern Transvaal Highveld are often situated in valleys where the depth of overburden to coal is small. Low stripping ratios result in economic mining, but mining in or through a valley necessitates dealing with the stream in that valley and two problems present themselves: Firstly, there is a distinct risk of flooding to the mine. Secondly, water entering either the opencast workings or the backfilled voids of the mine becomes saline and needs to be contained and dealt with in an environmentally acceptable manner. If this water is allowed to return directly to the natural streams, environmental damage could occur.

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