摘要
为了确定合理有效的瓦斯抽采钻孔间距,提高井下钻孔瓦斯抽采率,利用微震监测技术对钻孔进行无损监测,得到钻进扰动对钻孔的影响范围,从而确定钻孔成孔后其孔周裂隙发育情况,最终为钻孔间距的合理布置提供依据。以古城煤矿S1303胶带运输大巷为监测地点,现场监测了3个顺层钻孔钻进扰动对钻孔的影响范围,选取90%微震事件发生的范围作为边界进行数据处理分析。监测结果表明:古城煤矿S1303胶带运输大巷的钻孔受钻进扰动的影响范围在0.85~0.95 m。
In order to ensure the rationality of the drilling spacing arrangement and improve the gas extraction rate of the underground borehole,the authors adopted micro-seismic monitoring technology for non-destructive monitoring the drilling hole,the influence range of the drilling disturbance on the drilling hole was obtained,so as to determine the development of the cracks around the hole after completion of drilling,and finally provide the basis for the reasonable arrangement of the hole spacing.Taking the S1303 belt transportation roadway of Gucheng Coal Mine as the monitoring site,the influence range of drilling disturbance of three bedding drilling holes on the drilling holes was monitored,the range of 90%micro-seismic events was selected as the boundary to process and analyze the data.The monitoring results showed that the drilling hole of S1303 belt transportation roadway in Gucheng Coal Mine was affected by drilling disturbance in the range of 0.85~0.95 m.
作者
秦贵成
程仁辉
Qin Guicheng;Cheng Renhui(Shanxi Lu'an Mining Industry Group Co., Ltd., Changzhi, Shanxi 046000, China;College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China)
出处
《中国煤炭》
2020年第8期85-90,共6页
China Coal
关键词
微震监测
钻进扰动
影响范围
瓦斯抽采
micro-seismic monitoring
drilling disturbance
influence range
gas extraction
