单一低透气性厚煤层钻孔群合理封孔深度的研究  

Study of Single Low Permeability Thick Coal Seam Drilling Group Reasonable Hole Depth

作　　者：黄文军 邓春生 李森[2] 李翰林 

机构地区：[1]煤科集团沈阳研究院有限公司安全工程研究分院,沈阳113122 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭技术》2016年第6期163-165,共3页Coal Technology

摘　　要：采用现场工业试验与FLAC^(3D)数值模拟相结合的研究方法,研究了巷道开挖后巷道周围岩体应力"三区"的分布及钻孔群施工后对巷道应力"三区"范围的影响状况,得出封孔深度必须超过应力集中区的结论。以蒋家河煤矿ZF201工作面为例确定钻孔封孔深度为12 m,通过现场110 d的抽采观测,抽采浓度和抽采量均有了非常大的提高。Adopts the research method of numerical test and FLAC^3D industrial field combining simulation, studied the rock around tunnel stress ＂three areas＂ of the distribution and drilling group after construction should influence the condition of force ＂three zone＂ on roadways, draw the sealing depth must be more than the stress zone of the conclusion. With ZF201 working jiangjiahe coal mine as an example to determine the surface sealing borehole depth is 12 m, through the 110 days of the site drainage observation, extraction concentration and the drainage quantity had the very big improvement.

关 键 词：瓦斯抽采 透气性系数 封孔距离 钻孔参数 

分 类 号：TD712[矿业工程—矿井通风与安全]