CSAMT法在某铁路隧道勘察中的应用研究  

Application of CSAMT method in railway tunnel investigation

作　　者：欧阳涛[1,2] 底青云[2] 安志国[2] 李萌[1,2] 栾晓东[1,2] 张文伟[1,2] 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院页岩气与地质工程重点实验室,中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2016年第3期1351-1357,共7页Progress in Geophysics

基　　金：(ZDYZ2012-1-05)多通道大功率电法勘探仪、国家行业公益专项“地面电磁探测(SEP)系统研制”(201011079)课题联合资助

摘　　要：可控源音频大地电磁法(controlled source audiofrequency magnetotelluric,CSAMT)由于其相较于其他物探方法具有探测深度大、不受高阻层屏蔽、横向分辨率高等优点而被逐渐应用到铁路隧道勘察当中.本文介绍了CSAMT法的方法原理及工作方式,以红豆山隧道为例进行研究,在充分了解测区的地质地球物理的条件下设计合理的观测系统,并对原始数据进行分析处理之后进行带地形的二维反演.根据获得的电阻率剖面对隧道分段进行地质解释分析,为钻孔布设及隧道设计、施工提供基础依据.Controlled source audio-frequency magnetotelluric（ CSAMT）has been gradually applied to the railway tunnel exploration because of its high detection depth,not high resistivity layer shielding and high lateral resolution. This paper introduces the principle and working mode of CSAMT method andstudy on the case of the Hongdou Mountain Tunnel. The reasonable observation system is designed in the condition of fully understanding the geological and geophysical conditions. After that,we analyze the original data and carry on the 2-D inversion with terrain based on preprocessed data.The geological interpretation and analysis of the tunnel section is carried out according to the obtained resistivity section, which provides the basis for the design and construction of the borehole.

关 键 词：CSAMT 隧道 数据处理 反演 

分 类 号：P631[天文地球—地质矿产勘探]