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Hydrogeologic Effects Of Subsidence At A Longwall Mine In The Pittsburgh Coal Seam
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Citation (Style = APA)
Carver, Leslie (1994). Hydrogeologic Effects Of Subsidence At A Longwall Mine In The Pittsburgh Coal Seam. Proceedings of 13th International Conference on Ground Control in Mining
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Carver, Leslie (1994). Hydrogeologic Effects Of Subsidence At A Longwall Mine In The Pittsburgh Coal Seam. Proceedings of 13th International Conference on Ground Control in Mining
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Organization: International Conference on Ground Control in Mining
Pages: 10
Publication Date:
Jan 1, 1994
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Abstract
Abstract
| The effects of longwall mine subsidence on water resources were studied at a West Virginia coal mine (mine Z) by Carver (1994). Data were obtained for 137 domestic supply wells and springs and 12 baseflow streams. Subsidence caused short-term dewatering (of a few days to weeks) of wells located on lower hillslopes and valleys, and long-term dewatering of hillslope and hilltop springs (with no recovery yet). New or increased spring discharge was observed at lower elevations. Unsubsided water supplies experienced no dewatering beyond a nearby panel's 27°-38° angle of dewatering influence zone. Subsidence from longwall mining beneath streams commonly reduced discharge when panel ages were less than two to three years. However, "normal" discharge was typically observed over panels greater than three years in age; such streams exhibited lower baseflow recession constants, moderated winter baseflow, and increased summer baseflow compared to unsubsided streams. |
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