井下富水区瞬变电磁响应特征分析  

Transient Electromagnetic Response Characteristics of Mine Water-rich Area

作　　者：陈健强 张永超[1,2] 邱浩 廉玉广[1,2,3] 樊林林 CHEN Jianqiang;ZHANG Yongchao;QIU Hao;LIAN Yuguang;FAN Linlin(Mine Safety Technology Research Branch of China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization(China Coal Research Institute),Beijing 100013,China;Jincheng Anthracite Mining Group Technology Research Institute Co.,Ltd.,Jincheng 048006,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]山西晋煤集团技术研究院有限责任公司,山西晋城048006

出　　处：《煤矿安全》2019年第10期185-189,共5页Safety in Coal Mines

基　　金：国家科技重大专项资助项目（2016ZX05045001-004）;国家自然科学基金面上资助项目（51704162,51674142）

摘　　要：为提高全空间瞬变电磁法应用于探测富水异常区的解译效果,采用有限元正演模拟研究围岩体及富水异常体不同电性及几何参数条件下的瞬变电磁二次场响应形式及特征规律,并对现场实测数据进行分析。结果表明:围岩体与富水异常体电性差异大、富水异常体导电性好、体积大、距离近、相对线圈法向夹角小、空间三轴尺寸相近时,均有利于异常响应信号的表达。To improve the interpretation effect of detecting water-rich area by whole-space transient electromagnetic method,we adopted finite element method to simulate the response forms and characteristics of the induced electromagnetic field under different electrical and geometric parameters of surrounding rock and water-rich area,and analyzed the measured data in field.The study results showed that:larger difference of electrical properties between surrounding rock and water-rich area,better conductivity and bigger volume of water-rich area,closer distance and smaller normal angle of coil and the abnormal body,as well as the similar spatial tri-axial size,are beneficial to the expression of anomalous response signals.

关 键 词：全空间瞬变电磁法 富水区 三维有限元模拟 二次场 衰减 时空变化 

分 类 号：TD166[矿业工程—矿山地质测量]