垂直线源井-地电位探测地下动态导体的三维有限元数值模拟
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Release time:2020-08-09 DOI number:10.3969/j.issn.1672-7940.2008.06.002 Affiliation of Author(s):中南大学地球科学与信息物理学院 Teaching and Research Group:中南大学应用地球物理系 Journal:工程地球物理学报 Place of Publication:中国 Funded by:40804027；2007FJ4055 Key Words:垂直线源; 井地电位; 动态导体; 三维; 有限元 Abstract:利用钻孔金属套管作为线源供 电,在地表观察电位探测地下动态导体是一种实用的方法.在本文中,以垂直钻孔套管为垂直线源,介绍了垂直线源的地电场电位公式,给出了异常电位的变分问 题.针对有限元方程求解时计算速度慢和对内存要求高的问题,利用对称超松弛预条件共轭梯度算法结合按行压缩存储技术,提高了计算速度并且减少了对内存空间 的要求.采用异常电位的有限元法实现了井-地电位探测地下动态导体的三维数值模拟.通过一个低阻动态导体在不同埋深处模拟超大型垃圾场区渗滤液的地下去 向,算例结果表明利用垂直线源井地电位三维有限元研究探测地下动态导体是有效,可行的. Co-author:陈德鹏, 熊健奎, 冯德山 First Author:戴前伟 Indexed by:Applied Research Document Code:1672-7940( 2008) 06-0643-05 Discipline:地质资源与地质工程 Document Type:J Volume:5 Issue:6 Page Number:643~647 ISSN No.:1672-7940 Translation or Not:no CN No.:42-1694/TV Date of Publication:2008-12-30 -
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