摘要
通过系统研究白芨沟矿高瓦斯厚煤层2521区段各分层瓦斯涌出现状,发现瓦斯涌出来源主要包括本煤层瓦斯涌出、邻近层瓦斯涌出和采空区瓦斯涌出;基于各分层瓦斯涌出特点,研究了区域立体抽采措施设计及效果预测技术、区域立体综合抽采技术、区域立体抽采效果综合评价技术等;最终,采用"底板穿层钻孔+定向长钻孔"的井下立体抽采模式,结合工作面顺层钻孔进行强化抽采,取得了良好的现场应用效果。通过对2621区段2621首分层回采工作面回采期间瓦斯综合治理技术等的研究,形成了适合高瓦斯厚煤层分层开采的瓦斯综合治理关键技术体系,保证了白芨沟矿的安全、高效开采。
According to the systematic research on gas emission situation of each sub-layer in 2521 section of high gas thick coal seam in Baijigou Coal Mine, the gas sources are the mining coal seam gas emission, adjacent coal seam gas emission and goaf gas emission; based on the gas emission characteristics of each sub-layer, the paper studied the regional 3D drainage measures design and effect prediction technology, regional 3D comprehensive drainage technology, and the comprehensive evaluation technology; finally, applied the 3D underground drainage mode of three-dimensional floor crossing-seam borehole and long directional drilling, which enhanced the drainage with bedding drilling in mining face, and achieved favorable effect. Through the study of gas comprehensive control technology for 2621 first sub-layer mining face of 2621 section, a key technology system was designed for gas comprehensive management in slicing mining of high gas thick coal seam, which ensured the safe and efficient mining in Baijigou Coal Mine.
出处
《煤炭工程》
北大核心
2017年第F08期53-57,61,共6页
Coal Engineering
关键词
分层开采
瓦斯防治
厚煤层
定向长钻孔
底板穿层钻孔
slicing mining
gas control
thick coal seam
directional long borehole
floor crossing-seam drilling
