CSAMT方法联合三维地震成果判定煤矿断层导水特征

CSAMT Method Combined with 3D Seismic Results to Determine the Water Conductivity Characteristics of Coal Mine Faults

为探明煤矿采区断层的导水特征,结合地震勘探取得层位和断层发育成果,运用可控源音频大地电磁法对研究区域进行了探测。根据石炭、二叠煤系地层中上覆冲积层含水层、煤层顶板砂岩强含水层、煤层下覆奥陶系灰岩含水层等不同岩性含水层的电性分布规律及其表现出的电阻率异常,确定了各含水层的富水性强弱分布范围,对研究区内落差较大断层是否导通各含水层以及断层的富水性进行了判断,为煤矿开采中潜在水害问题提供了确定性的资料,进一步保证了煤矿安全高效生产。

In order to explore the characteristics of water conduction of faults in coal mining areas,this paper combined with the results of horizon and fault development obtained by seismic exploration,and used the controlled source audio magnetotelluric method to detect the study area.According to the electrical distribution rules and resistivity anomalies of different lithological aquifers,such as the overlying alluvial aquifer in carboniferous and Permian coal measure strata,the sandstone strong aquifer in coal seam roof and the Ordovician limestone aquifer overlying coal seam.The distribution range of water richness of each aquifer is determined,and the water richness of the fault with large drop in the study area is judged,which provides certain data for potential water damage in coal mining,and further ensures the safe and efficient production of coal mine.