大定源瞬变电磁法在探测煤矿采空区中的应用  

Application of large fixed loop transient electromagnetic method in detecting goaf in mine

作　　者：顾光跃[1] 王东伟[1] 

机构地区：[1]河南省地矿局第二地质勘查院,河南省许昌市461000

出　　处：《中国煤炭》2014年第10期35-38,共4页China Coal

摘　　要：阐述了大定源瞬变电磁法的基本原理、中心回线的视电阻率计算公式和低阻层下的数据校正方法。设计工区测线布置,观测完二次场后,对数据进行预处理。剔除畸变数据,反演、绘制视电阻率断面图和平面图,结合地质资料对煤矿采空区作出解释。针对采空异常区进行打钻验证,异常区富水性与推测相符。探测结果表明,大定源瞬变电磁法对解决煤矿采空区地质问题是一种快捷、高效的勘查手段。This paper introduces the basic principle,formula for apparent resistivity of central loop and data-corrected method in low resistivity layer of large fixed loop TEM.It designs the arrangement of measuring-line in working area,and preprocesses the data after getting the information from the secondary field.It eliminates the distorted data,inverts and draws the apparent resistivity profile and planar graph,and finally explains the goaf in mine combining with the geological data.It is found that the water abundance in abnormal areas matches the speculated result after drilling the abnormal areas for verification.The detection results show that the large fixed loop TEM is a quick,effective exploration method to solve the geological problems of goaf in coal mine.

关 键 词：大定源瞬变电磁法 视电阻率 地质异常区 煤矿采空区 采空区探测 

分 类 号：P631[天文地球—地质矿产勘探]