典型地质异常体电磁法响应特征研究  

Study of Electromagnetic Response Characteristics of Typical Geological Anomalous Body

作　　者：牟义[1,2,3] 

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]山西晋煤集团技术研究院有限责任公司物探工程分公司,山西晋城048006

出　　处：《煤矿开采》2017年第4期4-9,共6页Coal Mining Technology

基　　金：国家科技重大专项资助项目(2016ZX05045001-004);国家自然科学基金(51404139)

摘　　要：为了精确预测煤矿构造、采空区及含水体等地质异常体,采用矿井瞬变电磁法在晋城矿区井下进行了大量试验研究,通过收集构造、采空区等典型地质异常体验证案例,分析电磁场响应多参数曲线,识别不同地质异常体的电磁场响应特性,形成各类便于分辨的可视化图件,来解释矿井构造、采空区及含水体等地质异常体分布范围及特性,达到精细化探测目的。结果表明:整体电位值相对较低,视电阻率值相对较高,且电位和视电阻率曲线出现跳跃起伏,这是识别不含水构造或采空区的典型电性特征;整体电位值相对较高,视电阻率值相对较低,电位和视电阻率曲线较为圆滑衰减,反演深度较正常岩层深度要浅,则是含水构造或采空区积水的典型电性特征。In order to precisely prediction geological anomalous bodies, such as coal mine tectonics, goaf and water body, a large a-mount of experiments studying with transient electromagnetic method was done in Jincheng coal mine district, some typical geological anomalous body cases were collected, which include tectonics, goaf and so on, many electromagnetic filed parameters response curve was analyzed, the electromagnetic response characters of different geological anomalous body were identified, then some easily distin-guished visual pictures were for^ ned, the distribution scope and characters of some geological anomalous bodies of mine structures, goaf and water body could be explained, the precisely prediction could be reached. The results showed that the integral potential was low relatively, apparent resistivity was high relatively, fluctuation change appeared in potential and apparent resistivity curves,i t’ s a typical character of structures without water and goaf, integral potential was high relatively, apparent resistivity was low relatively, smoothing attenuation appeared in potential and apparent resistivity curves,the inversion depth was more deeper than normal rock stra-ta was typical character of structure with body and goaf water.

关 键 词：瞬变电磁法 电位曲线 视电阻率曲线 采空区 断层 陷落柱 

分 类 号：TD175[矿业工程—矿山地质测量]