1.引言地震预报中的地电法观测研究已经普遍开展,並取得了一定的效果。但是,由于震源区孕震环境的复杂性以及干扰因素的多样性,人们需要了解地电台址下勘探体积内电阻率的分层情况,从而设法从自然正常的背景值上分离出地震前的地电信息。由于野外地质情况复杂,仅仅依靠天然电性观测已不能满足地震预报的需要,而且借助于计算模型也只能解决一些简单 1. INTRODUCTION The geoelectric observational research in earthquake prediction has been carried out universally and has achieved some results. However, due to the complexity of the seismogenic environment in the focal zone and the diversity of interference factors, it is necessary to understand the stratification of the resistivity within the exploration volume at the station and to try to separate the pre-earthquake ground from the naturally occurring background value Electrical information. Due to the complex geological conditions in the field, it is not enough to rely on natural electrical observations to meet the needs of earthquake prediction. With the help of computational models, only some simple