V8可控源音频大地电磁法在铁路隧道不良地质勘察中的应用  

Application of V8 CSAMT on railway tunnel anomaly rock exploration

作　　者：徐新学[1] 吴正刚[2] 王身龙 费海岩[1] 代涛[1] 

机构地区：[1]河北九华勘查测绘有限责任公司,河北保定071051 [2]中国中铁二院工程集团有限责任公司地勘岩土公司,成都610031

出　　处：《工程勘察》2010年第6期74-77,共4页Geotechnical Investigation & Surveying

摘　　要：铁路隧道不良地质调查是规避施工风险的重要方面,高效快捷的可控源音频大地电磁法利用不同岩性和相同岩性不同辅存结构间所反映的电性特征差异,可以较好地进行围岩级别划分和断裂破碎带判别,为隧道设计和施工提供资料依据。文章结合云桂线铁路定测阶段的施工,选择了灰岩、砂页岩、板岩及含矿围岩等典型地段具体实例,对围岩分级和不良地质体圈定进行了分析,并认为在隧道施工中兼顾矿产资源勘查也是必要的。To survey anomaly geological rock is important on railway tunnel construction and one of the important method is CSAMT.The principle of CSAMT is based on electrical characteristics of different lithology and auxiliary storage structure of different lithology.To make full use of electrical characteristics,the levels of wall rock and fracture for rail tunnel construction design can be determined.The profile across limestone,sandstone,shale,slate on Yungui railway tunnel is a real example for rock grading standards and anomaly geological discriminant principle.The mineral resource exploration following the railway tunnel investigation shall also be considered.

关 键 词：可控源音频大地电磁 铁路隧道 不良地质现象 电阻率 

分 类 号：P631.325[天文地球—地质矿产勘探]