中文摘要：

针对坑道直流电法异常受坑道空腔及坑道内各种良导设施的影响发生严重畸变,给实测资料解释和异常体的准确定位带来困难,用有限元法对坑道直流电法环境影响进行了三维数值模拟,首先研究了坑道特殊条件下电阻率有限元计算方法并编制了计算程序,并设计3个不同模型计算坑道环境对周围异常体探测的影响,再使用比较法、差值法和综合改正法对坑道环境影响进行消除。计算结果表明,坑道直流电阻率法实测数据解释前必须进行坑道环境影响消除,比较法、差值法和综合改正法等都可以消除坑道环境影响。

英文摘要：

Due to the tunnel cavities and a variety of engineering facilities in the tunnel,the resistivity anomaly is subject to serious distortion,which will increase the difficulty of data interpretation and accurate locating of the abnormal body.In this paper,the finite element method was used to calculate the tunnel environment response,the resistivity calculation method under the special tunnel condition was analyzed,and computer modeling experiments were conducted.And then,according to the environmental anomalies in different survey lines,three different models were designed to calculate the effect of tunnel environment on the detection of surrounding abnormal bodies.The ratio method,difference method and integrated correction method which are used for reducing the false anomaly resulting from tunnel environment were employed.The results show that it is necessary to remove the tunnel environment anomaly before the interpretation of measured data,and the above methods can be used to eliminate the environmental influence of the tunnel.