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.