摘要
为探究高密度电法对起伏地形条件下岩溶发育探测的可行性,通过基于有限元法与最小二乘法建立的起伏地形下正反演数值模拟,探究了该方法在起伏地区的进行岩溶发育探测的理论可行性,并对位于丘陵地区的工程场地进行了高密度电法探测。结果表明:该方法能有效探测出多处相对低阻封闭圈异常,解释为隧道灰岩层中存在多处溶洞且溶洞之间具有一定的连通性,在起伏地形下高密度电法可以应用于岩溶发育范围探测。
In order to explore the feasibility of high-density electrical method to detect karst development in rolling terrain,the forward and inverse numerical simulation in the rolling terrain has been established based on the finite element method and the least-square method.The theoretical feasibility of this method to detect karst development in rolling terrain has been explored.Besides,the high-density electrical method has been adopted to detect the engineering site in hilly region.The results show that this method can effectively detect many low resistivity closed-loop anomalies,which can be interpreted as the existence of multiple karst caves in the limestone layer of the tunnel and the connectivity.The high-density electrical method can be applied to the detection of karst development range over rugged terrain.
作者
林士宝
吴荣新
胡富彭
欧元超
Lin Shibao;Wu Rongxin;Hu Fupeng;Ou Yuanchao(School of Earth and Environment, Anhui University of Science and Technology, Huainan Anhui 232001, China)
出处
《工程地球物理学报》
2020年第4期478-483,共6页
Chinese Journal of Engineering Geophysics
关键词
岩溶
起伏地形
高密度电法
数值模拟
karst
rugged terrain
high-density electrical method
numerical simulation
作者简介
第一作者:林士宝(1995-),男,硕士研究生,主要研究方向为地球物理勘探,E-mail:1354170894@qq.com;通讯作者:吴荣新(1972-),男,博士,教授,主要研究方向地球物理勘探,E-mail:rxwu@aust.edu.cn。
