摘要
首先介绍一种新的基于补偿电极的对称四极直流电阻率探测方法。利用有限元分析软件,对地下存在异常体的二维介质模型进行了数值模拟分析,数值计算出地下不同深度低阻和高阻水平柱体、低阻和高阻垂直板状体的视电阻率剖面曲线。不同深度视电阻率剖面曲线存在如下特征：异常体投影点上方曲线存在明显的异常变化；存在补偿电流的曲线异常幅度大于无补偿电流的异常幅度；浅埋深的异常幅度大于深埋深的异常幅度。
Firstly, a new DC resistivity detecting method based on compensating electrode is introduced. Then the two dimension models with an abnormity underground is analyzed with finite element software. The apparent resistivity section curves are computed when there is a low or high resistance horizontal column and vertical sheet in different depth. The curves character as follows： There is obvious abnormity above the projection point of the abnormity objectt The curve abnormity extent with compensating current is larger than the extent without compensating current; The abnormity extent with shallow burial depth is larger than the extent with large depth.
出处
《工程地球物理学报》
2006年第5期343-349,共7页
Chinese Journal of Engineering Geophysics
关键词
补偿电极
直流电阻率
数值模拟
异常
hicompensating electrode
resistor DC
numerical simulation abnormity
