基于微震监测的底板陷落柱注浆围岩体采动破坏研究  

Research on mining-induced failure of grouted rock mass around collapse column based on micro-seismic monitoring

作　　者：余国锋[1,2] 韩云春 任波 魏廷双 郑群 汪洋 牟文强 YU Guofeng;HAN Yunchun;REN Bo;WEI Tingshuang;ZHENG Qun;WANG Yang;MU Wenqiang(State Key Laboratory for Safe Mining of Deep Coal and Environment Protection,Huainan Mining Group Co.,Ltd.,Huainan 232000,China;Ping’an Coal Mining Engineering Technology Research Institute Co.,Ltd.,Huainan 232000,China;Huainan Mining Group Coal Branch Co.,Ltd.,Huainan 232000,China;Unis Software System Co.,Ltd.,Beijing 100083,China)

机构地区：[1]淮南矿业(集团)有限责任公司深部煤炭安全开采与环境保护全国重点实验室,安徽淮南232000 [2]平安煤炭开采工程技术研究院有限责任公司,安徽淮南232000 [3]淮南矿业(集团)有限责任公司煤业分公司,安徽淮南232000 [4]紫光软件系统有限公司,北京100083

出　　处：《煤矿安全》2024年第12期206-213,共8页Safety in Coal Mines

基　　金：安徽省自然科学基金资助项目(2008085ME145)。

摘　　要：随着浅部煤炭资源逐渐枯竭,制约淮南矿区最下组可采煤层A组煤安全开采的最大威胁由瓦斯转变为底板承压水。根据潘二煤矿12123工作面生产地质概况,建立了煤层底板完整的微震监测系统;通过挖掘与解译微震监测数据,提出了采动诱发岩体破坏及其导通性的微震判识方法,定义了以微破裂导通率来分析采动裂隙演化的方法,揭示了底板陷落柱注浆围岩体采动破坏导通演化特征。研究结果表明:受煤层底板超前注浆加固的影响,微震事件在底板陷落柱注浆区域表现出绕行分布的现象,底板导通率在陷落柱的交界面、浅层位呈现纵向贯通带,其他区域受浆脉阻隔作用而呈现零星的孤立分布。With the gradual depletion of shallow coal resources,the most serious threat restricting the safe mining of Group A coal seams in Huainan Mining Area has changed from gas to floor confined water.According to the production and geological conditions of 12123 working face in Pan’er Mine,a micro-seismic monitoring system was established for the coal floor.Through mining and interpreting micro-seismic data,a micro-seismic identification method for floor failure and conduction induced by mining was proposed.An inversion method of mining fractures evolution was defined based on micro-fractures conductivity.The failure conduction evolution characteristics of grouted rock around collapse column were revealed.The results show that,affected by the advance grouting reinforcement,micro-seismic events show a phenomenon of detour distribution around the grouted collapse column.There was a longitudinal through zone for floor conductivity in the interface and shallow layer,and other areas were sporadically isolated due to the barrier of grouting veins.

关 键 词：底板突水 下三带 微震监测 导通率 陷落柱 

分 类 号：TD745[矿业工程—矿井通风与安全]