基于天然电场选频法在山区抗旱找水中的应用研究  

Application research of frequency selection method of telluric electricity field for drought resistant water prospecting in mountain area

作　　者：张叶鹏 黄朝宇 陈钰轩 杨天春[2] ZHANG Yepeng;HUANG Chaoyu;CHEN Yuxuan;YANG Tianchun(Land Space Survey and Monitoring Institute of Hunan Province,Changsha 410129,Hunan,China;School of Earth Sciences and Spatial Information Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)

机构地区：[1]湖南省国土空间调查监测所,湖南长沙410129 [2]湖南科技大学地球科学与空间信息工程学院,湖南湘潭411201

出　　处：《矿产与地质》2023年第4期788-793,共6页Mineral Resources and Geology

基　　金：湖南省教育厅基金项目“基于浅层复杂介质的天然电场选频法正演模拟与应用研究”(编号:16K031)资助。

摘　　要：文章主要探讨在山区抗旱找水中快速定井问题,结合工程实践,利用天然电场选频法剖面测量、选频法单点测深、音频大地电磁法开展综合探测研究。首先利用天然电场选频法剖面测量获得了低电位异常,结合地质分析确定了岩溶裂隙带的平面位置;然后对剖面70 m处开展选频法单点测深工作,推测了4个含水深度,确定了岩溶裂隙带发育埋深;最后利用音频大地电磁法对剖面70 m处异常进行佐证,探测结果与天然电场选频法一致性较好。经过钻孔验证,各出水段深度与物探推测具有较高的吻合性。综合分析表明天然电场选频法是快精准定井的一种好方法,值得进一步推广研究。This paper mainly discusses the problem of rapid well location in drought resistant water exploration in mountain areas.Combined with engineering practice,comprehensive exploration research is carried out by using natural electric field frequency selection method(FSMTEF)profile survey,frequency selection method single point sounding,and audio frequency magnetotelluric method(AMT).Firstly,the low potential anomaly is obtained by using FSMTEF profile survey,and the plane position of karst fracture zone is determined by combining geological analysis.Then,frequency selective single point sounding is carried out at 70 m in the section,4 water bearing depths are inferred,and the burial depth of karst fracture zone is determined.Finally,AMT is used to prove the 70 m anomaly,and the detection results are in good agreement with the natural electric field frequency selection method.The drilling verification shows that the depth of each outlet section is highly consistent with the geophysical prediction.The comprehensive analysis shows that FSMTEF is a good method for rapid and accurate well location,which is worthy of further promotion and research.

关 键 词：天然电场选频法 音频大地电磁法 山区抗旱找水 

分 类 号：P631.3[天文地球—地质矿产勘探] P641[天文地球—地质学]