Safety top-coal-caving of heavy and steep coal seams under complex environment

LAI Xing-ping; WANG Ning-bo; XU Hai-dong; QI Tao; CAO Jian-tao; JIANG Dong-hui

doi:10.13374/j.issn1001-053x.2009.03.030

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Article Navigation > Chinese Journal of Engineering > 2009 > 31(3): 277-280

LAI Xing-ping, WANG Ning-bo, XU Hai-dong, QI Tao, CAO Jian-tao, JIANG Dong-hui. Safety top-coal-caving of heavy and steep coal seams under complex environment[J]. Chinese Journal of Engineering, 2009, 31(3): 277-280. doi: 10.13374/j.issn1001-053x.2009.03.030

Citation:

LAI Xing-ping, WANG Ning-bo, XU Hai-dong, QI Tao, CAO Jian-tao, JIANG Dong-hui. Safety top-coal-caving of heavy and steep coal seams under complex environment[J]. Chinese Journal of Engineering, 2009, 31(3): 277-280. doi: 10.13374/j.issn1001-053x.2009.03.030

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Safety top-coal-caving of heavy and steep coal seams under complex environment

doi: 10.13374/j.issn1001-053x.2009.03.030

1. Energy and Resource School, Xi'an University of Science and Technology, Xi'an 710054, China;
2. Key Laboratory of Western Mine & Hazard Prevention, Ministry of Education of China, Xi'an 710054, China;
3. Shenhua Xinjiang Energy Co. Ltd., Wulumuqi 830027, China

Received Date: 2008-01-21
Available Online: 2021-08-09

Abstract

Abstract

The seam angle is 64°+ and the mining level height is 54 m at the + 579E2EB₁₊₂ top-coal-caving working face in Weihuliang Mine in northwestern China. Theoretical analysis, numerical calculation and field test were used to study roof collapse and gas overlimit in mined-out area during mining on the working face. The results show that fast mining, control symmetrical top-coal caving in dipping and strike directions, optimizing the ventilation system, and the initiative in preventing gas are valid for safety mining.
- complex environment,
- heavy and steep coal seam,
- excavation disturbance zone,
- spalling structure,
- dynamic destabilization