近水平煤层井上下微震联合监测技术及应用  

Application of combined ground-underground microseismic monitoring technology in near-horizontal coal seam

作　　者：魏焕伟 陈洋 韩飞 张坤 WEI Huanwei;CHEN Yang;HAN Fei;ZHANG Kun(Research Center for Rock Burst Control,Shandong Energy Group Co.,Ltd.,Jinan 250014,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Research Office for Rock Burst Control,Bayangol Coal Mine,Ordos 017312,China)

机构地区：[1]山东能源集团有限公司冲击地压防治研究中心,山东济南250014 [2]北京科技大学土木与资源工程学院,北京100083 [3]巴彦高勒煤矿冲击地压防治办公室,内蒙古鄂尔多斯017312

出　　处：《煤炭工程》2023年第7期84-88,共5页Coal Engineering

基　　金：山东省重大科技创新工程项目(2019SDZY02);国家重点研发计划项目(2020YFB1314200)。

摘　　要：准确探测顶板岩层微震活动位置,尤其是震源垂直定位位置是了解覆岩空间结构特征的重要依据,对实现冲击地压精准防控具有重要意义。受限于软件算法和近水平煤层工作面测站布置方式,井下传统微震监测系统测得微震事件垂直方向定位精度低,无法满足覆岩结构运移精准监控的需求。鉴于此,在井下微震监测系统的基础上,增加地面监测台站,构成井上下微震联合监测系统,并在石拉乌素煤矿3111盘区开展工程示范。数据分析可知,井上下微震联合监测系统对能量大于1.0×10^(3)J的微震事件监测效果更佳,监测到的微震事件高程平均比井下传统微震监测系统高35.2 m,震源定位结果普遍跟矿井实际条件更加贴合,表明增加地表监测台站可有效提高震源垂直定位精度。研究成果对实现近水平煤层覆岩空间结构精准探测提供经验借鉴和指导。Accurate detection of the location of microseismic activity in the roof rock,especially the vertical location of the seismic source,is an important basis for understanding the spatial structural characteristics of the overburden rock,and is of great significance for achieving accurate prevention and control of impact ground pressure.Due to the limitation of software algorithm and the way of station arrangement at near horizontal coal seam,the vertical positioning accuracy of microseismic events measured by traditional underground microseismic monitoring system is low,which cannot meet the demand of accurate monitoring of overburden structural transport.In view of this,on the basis of the underground microseismic monitoring system,ground monitoring stations were added to form a combined ground-underground microseismic monitoring system,and an engineering demonstration was carried out in the 3111 area of Shilawusu Coal Mine.The data analysis shows that the combined microseismic monitoring system is more effective in monitoring microseismic events with energy greater than 1.0×103 J,and the monitored microseismic event elevation is on average 35.2 m higher than that of the conventional underground microseismic monitoring system,and the seismic source positioning results generally fit better,indicating that adding ground monitoring stations can effectively improve the vertical positioning accuracy of seismic sources.The research results provide experience and guidance for the accurate detection of spatial structure of near-horizontal coal seam overburden.

关 键 词：冲击地压 近水平煤层 联合微震监测 震源 定位精度 

分 类 号：TD324[矿业工程—矿井建设]