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Outburst Control in Underground Coal Mines,
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Citation (Style = APA)
Varley, Floyd D. (1986). Outburst Control in Underground Coal Mines,. Proceeding of the Fifth Conference on Ground Control in Mining (ICGCM)
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Varley, Floyd D. (1986). Outburst Control in Underground Coal Mines,. Proceeding of the Fifth Conference on Ground Control in Mining (ICGCM)
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Organization: International Conference on Ground Control in Mining
Pages: 8
Publication Date:
Jan 1, 1986
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Abstract
Abstract
| Outbursts, the sudden and violent out- pouring of material into mine openings, is a ground control problem increasingly encountered in the United States as deeper seams are developed. Outbursts, caused by several mechanisms, are the result of the loading of ground support systems be- yond their designed capacity to failure, manifested in a violent release of stored energy. There are several types of outbursts typical to deep underground coal mines. - Outbursts of the coal face due to the presence of pressure abutments in close proximity to the face. These outbursts are usually accompanied by liberation of large amounts of methane. - Instantaneous convergence of the ribs and floor due to overloading and failure of ribs which lengthens the beam of floor strata sometimes resulting in a chain reaction failure of the mine floor. - violent failure of the confined core of a pillar due to rapid loading beyond the yield point of the pillar. |
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