CSAMT在深埋隐伏断层导水性探测中的应用

针对大埋深条件下常规物探手段对断层探查精度较低的问题，采用CSAMT物探手段进行了探测。通过CSAMT适用性分析、现场参数优化试验、数据处理和反演计算，获得了探测区域地层视电阻率综合剖面，并与TEM探测结果进行对比。结果表明：CSAMT分辨率更高，电磁场信号更强，对深埋地层探测有明显的适用性|确定了CSAMT合理的测试参数，频段选择为5120～4Hz，频点数为32个，叠加时长为30min|对比分析了CSAMT与TEM现场应用的视电阻率，CSAMT可较好的反映出煤系地层倾角变化和局部富水程度，提高了探测的精细化程度。研究结果可为深埋隐伏构造或煤层顶底板富水性精细化探测提供技术手段与应用参考。

Application of CSAMT in the detection of water conductivity in deep buried concealed faults

Aiming at the problem of low accuracy of fault detection by conventional geophysical methods under the condition of large burial depth, taking a mine in Inner Mongolia as an example，a methods of controlled-source audiomagnetotellurics (CSAMT) was used for exploration.. Through the CSAMT suitability analysis, field optimization test, data processing and inversion calculation, the integrated resistivity of the stratum in the exploration area is obtained and compared with the TEM detection results. The results show that the CSAMT has higher resolution and stronger electromagnetic field signal, which has obvious applicability to deep buried layer detection. The reasonable test parameters of CSAMT are determined, which are 5120~4Hz in frequency band, 32 in frequency points and 30 minutes in superposition time. The apparent resistivity of CSAMT and TEM field applications is compared and analyzed, and CSAMT can better reflect the change of coal seam dip angle and local water enrichment, and improve the degree of refinement of detection. The research results can provide technical means and application reference for the deep buried concealed structure or the enrichment fine detection of the coal seam roof.