高密度电法结合EH4电磁法在查明隐伏构造中的应用  

Application of high-density electrical and EH4 electromagnetic methods in identifying hidden structures

作　　者：李吉艳 LI Jiyan(Xinjiang Water Conservancy and Hydropower Survey and Design Institute Co.,Ltd.,Changji 831100,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆昌吉831100

出　　处：《水利建设与管理》2024年第2期33-38,44,共7页Water Conservancy Construction and Management

摘　　要：布尔津县冲乎尔东岸灌区供水改造工程隧洞段洞线较长、埋深较深,地质条件不明,为探明隧洞段隐伏构造、基岩破碎带的规模和大小,采用高密度电法结合EH4电磁法进行综合探测,通过两种方法在探测区间下的互补,精确探测洞线位置隐伏构造、基岩破碎带的分布情况。该成果表明,对于异常特征明显的隐伏构造,基于电阻率差异的综合物探方法能快速有效查明其分布规模,为后期施工开挖中围岩分类、支护形式确定等提供有力的数据支撑。In the tunnel section of the Chonghu’er Dong’an Irrigation Area Water Supply Improvement Project in Burqin Prefecture,the tunnel is long and deep,with uncertain geological conditions.In order to determine the scale and extent of hidden structures and fractured rock zones in this tunnel section,a comprehensive survey was conducted using high-density electrical and EH4 electromagnetic methods.These two methods complemented each other and accurately detected the distribution of hidden structures and fractured rock zones along the tunnel alignment.The results show that for hidden structures with distinct anomalies,the comprehensive geophysical approach based on resistivity differences can quickly and effectively identify their distribution scale.This provides valuable data support for later stages of construction,including rock classification and support design.

关 键 词：高密度电法 EH4电磁法 隐伏构造 低阻异常 

分 类 号：TV68[水利工程—水利水电工程]