CSAMT在深埋隐伏断层导水性探测中的应用  

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

作　　者：杜明泽 张永超 黎灵[1,2] 牟义 王国库[1,2] DU Ming-ze;ZHANG Yong-chao;LI Ling;MU Yi;WANG Guo-ku(Mine Safety Branch,China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization(China Coal Research Institute),Beijing 100013,China;Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]辽宁工程技术大学,辽宁阜新123000

出　　处：《煤炭工程》2020年第5期92-96,共5页Coal Engineering

基　　金：煤科院科技发展基金项目(2019CX-Ⅱ-13);中国博士后科学基金资助项目(2019M660598);国家科技重大专项资助项目(2016ZX05045001-004)。

摘　　要：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。Aiming at the low fault detection accuracy of conventional geophysical methods under large burial depth,controlledsource audiomagnetotellurics( CSAMT) is 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 in deep buried layer detection. The reasonable test parameters of CSAMT are determined,which are 5120~ 4 Hz 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.

关 键 词：深埋地层 隐伏断层 导水性 可控源音频大地电磁法 

分 类 号：TD745.2[矿业工程—矿井通风与安全]