煤矿水害防治中的综合物探技术应用

煤矿采空区或回采阶段工作面常面临水力渗透威胁, 如何快速有效且低成本地预判水力渗透成为难题。提出并系统论述了一种面向水力渗透型采空区的音频大地电磁三维反演及快速解译方案。通过设计采空区理论地电模型, 探讨采空区电阻率三维反演可行性。实测数据反演解释结果揭示: 采空区巷道顶板区域存在明显低阻分布, 部分工作面存在顶板裂隙导水造成的富水低阻区域, 局部垮落带与上覆含水层明显连通。为可疑透水位置定位、水位和涌水量监测，以及后续开采规划制订提供了参考。从理论和实证角度, 为音频大地电磁法的采空区富水状态分析和动态监控应用提供了新思路, 相关方法能够有效提高水力渗透型采空区的解译效果。

Overview of goaf water hazards control in China coalmines

Coal mine goaf or stoping stage often face the hydraulic ponetration threat, how to predict it quickly, effectively and at low-cost becomes a difficult problem.An audio-frequency magnetotelluric (AMT) three-dimensional inversion and rapid interpretation scheme for hydraulic permeable goaf was presented and systematically discussed.The theoretical geo-electrical models were designed and the feasibility of the three-dimensional inversion of the goaf resistivity was fully discussed.The inversion interpretation results using the actually measured data have demonstrated that there is an obvious low resistive distribution in the goaf area.In some working faces, there are water-rich and low-resistance areas caused by roof fissure water conduction, and local caving zone is obviously connected with overlying aquifer.It provides a reference for the location of suspicious seepage, the monitoring of water level and inflow, and the formulation of subsequent mining planning.From the theoretical and empirical perspective, this study provides a new idea for the application of AMT method in the analysis and dynamic monitoring of the water rich state of the goaf, and the related methods can effectively improve the interpretation effect of hydraulic permeable goaf.