通过增大测量极距和提高供电电流2种实验途径，探讨提高兴济地电台地电阻率观测精度，结果表明，提高供电电流能明显提高兴济地震台地电阻率观测精度，且与供电电流提高倍率相当，而增大测量极距效果甚微。其原因是，提高供电电流是在干扰幅值不变情况下增大人工供电电位差，而增大测量极距使人工供电电位差和干扰幅值同比例增大，二者相抵，对观测精度作用不明显。
Two kinds of methods, changing the distance of the distance of the measurement poles or the supply curent, are used in the experiment for improving the observation precision of resistivity.The results show that the increasing the supply current can obviously improve the observation accuracy of georesistivity at Xingji Seismic Station, and the improvement of the observation accuracy is approximately equal to the magnification of the supply current. But it's less effective to improve the observation accuracy of georesistivity at Xingji Seismic Station by increasing the measurement pole distance. The reason is to improve the power of supply current amplifys the potential difference as the interference keeps constant, so the accuracy of observation is improved, while increasing the measuring distance may amplify both the artificial power potential difference and the interference amplitude simulteneously in the same proportion, and can improve the observation accuracy obviously.
2018,39(2): 70-76 收稿日期：2017-02-27
DOI：10.3969/j.issn.1003-3246.2018.02.010
基金项目：河北省地震局地震科技星火计划（项目编号：DZ20150423063）
作者简介：郭学增(1971-),男,本科学历,河北沧州人,高级工程师,主要从事地电观测与研究工作。E-mail:xingjitai@126.com
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