不等长工作面微震响应特征分析  

Analysis of microseismic response characteristics of unequal length working face

作　　者：周金艳 桂二国 扈勇亮 Zhou Jinyan;Gui Erguo;Hu Yongliang(Hebei Coal Research Institute Co.,Ltd.,Xingtai 054000,China;Hebei Mine Microseism Key Laboratory,Xingtai 054000,China;Jiulong Mine,Jizhong Energy Fengfeng Group Handan Baofeng Mining Co.,Ltd.Handan 056200,China)

机构地区：[1]河北煤炭科学研究院有限公司,河北邢台054000 [2]河北省矿井微震重点实验室,河北邢台054000 [3]冀中能源峰峰集团邯郸宝峰矿业有限公司九龙矿,河北邯郸056200

出　　处：《煤炭与化工》2022年第4期43-48,共6页Coal and Chemical Industry

基　　金：邢台市重大科技成果转化项目(2020ZZ010);邢台市重点研发计划自筹项目(2020ZC007)。

摘　　要：为实现不等长工作面的安全回采,在峰峰集团九龙矿15240工作面开展了连续、实时、动态的微震监测研究。结果表明,不等长工作面微震响应具有阶段性特征,分为窄面、由窄变宽、宽面3个发展阶段。在由窄变宽阶段微震事件频次明显增大,能量增幅大,应力集中显现。工作面变宽之后,底板事件增幅大于顶板事件增幅,平均底板扰动深度增大。In order to achieve the safe mining of unequal length working face,continuous,real time and dynamic microseismic monitoring research was carried out at No.15240 face of Fengfeng Group Jiulong Mine.The results showed that the microseismic response of unequal length working face had periodic characteristics,which could be divided into three development stages:narrow face,narrow to wide and wide face.In the stage from narrow to wide,the frequency of microseismic events increased significantly,the energy increased greatly,and the stress concentration appeared.After the working face became wide,the increase of floor events was greater than that of roof events,and the average floor disturbance depth increased.

关 键 词：不等长 响应特征 微震监测 应力集中 

分 类 号：TD74[矿业工程—矿井通风与安全]