我国井下地电阻率观测技术现状分析

The status of deep-well geo-electrical resistivity observation in China

地震地电阻率前兆观测在中国开展了近50年,各种电磁干扰以及一些与地震无关的地表覆盖层电性结构变化一直影响着地电阻率观测,特别是近年来,电磁干扰越来越严重,为了抑制和减小电磁干扰和环境因素的影响,多个台站开展了试验性的井下地电阻率观测。通过对我国目前开展井下地电阻率观测台站的调研,总结了观测中成功的经验和存在的问题,并在此基础上,对井下观测装置技术的各个环节,提出相应较合理的技术措施。

The geo-electric resistivity observation had been seriously affected by many kinds of electromagnetic interference during the last 50 years in China. Nowadays faced with the increasingly serious electromagnetic interference situation, deep-well geo-electrical resistivity observation experiments have been adopted in several observation stations in order to decrease or eliminate all kinds of inference of the earth.Based on the investigation to these stations, this paper summarized technical aspects of the confi guration in deep-well geo-electrical resistivity and gave some reasonable suggestions for the deep-well geo-electrical resistivity observation.