采动卸压下伏煤层瓦斯L型井抽采技术研究

doi:10.11799/ce201802028

Abstract

Abstract: 摘要：为实现高瓦斯和煤与瓦斯突出矿井受采动卸压影响的下伏煤层瓦斯抽采，以山西晋城矿区寺河煤矿3#煤层5303工作面为研究对象，系统研究了3#煤层采动卸压后下伏9#煤层岩体的裂隙发育规律、应力分布特征和渗透性变化特性；数值模拟表明，工作面受采动影响垂向卸压范围可达71.43m，9#煤层在底鼓变形带内，最大卸压值可达3.61MPa，使得该区域裂隙发育，渗透率提高。本文研究提出了一种煤矿瓦斯地面抽采新模式，即采用斜直井钻机地面施工L型井方式抽采经采动卸压的下伏煤层瓦斯，其研究成果对同类煤矿开采条件下高瓦斯和突出煤层瓦斯抽采工作具有重要指导借鉴意义。关键词：采动卸压下伏煤层瓦斯 “L”型井抽采

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TD712+.6

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Study on Drainage Technology of Underlying Coal Seam Gas for L Type Well under Mining Pressure Relief

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