瞬变电磁法在探测煤矿采空区中的应用  

Application of Transient Electromagnetic Method in Coal Mine Gob

作　　者：张开元[1] 韩自豪[1] 周韬[1] 

机构地区：[1]河南省煤田地质局物探测量队,郑州450009

出　　处：《工程地球物理学报》2007年第4期341-344,共4页Chinese Journal of Engineering Geophysics

摘　　要：瞬变电磁法是目前工程勘察中应用较广的物探工作方法之一。该方法观测纯二次场,故分辨率高,可分辨出地下规模较小的不均匀体,尤其对低阻地质体反应灵敏。采空区地层有其独特的地电特征,可以利用瞬变电磁法进行探测。笔者将瞬变电磁法用于新汶某煤矿边界老窑采空区探测及河北某城镇采空区圈定,均取得良好的效果。　Transient electromagnetic method is a widely applied approach in geotechnical investigation and surveying.Because secondary field signal is acquired,it has high resolution in small inhomogeneous geological object,especially in conductive one.Coal mine gob has its unique geo-electrical identity,so it can be detected using TEM.The author applied TEM on the investigation of coal mine gob in a coal mine in Shandong province and a city in Hebei province,and all the two projects have been well justified.

关 键 词：瞬变电磁法 煤矿 采空区 电阻率 

分 类 号：P631.325[天文地球—地质矿产勘探]