长短极距比值干扰源定位方法及其在地电场观测中的实际应用  

A method for locating interference source by long-and-short polar distance ratio and its practical application in geoelectric field observation

作　　者：谭洁玉 李蓝萍 孙君嵩 Tan Jieyu;Li Lanping;Sun Junsong(Jiangsu Earthquake Agency,Nanjing 210014,China;Guangdong Hydrogeology Battalion,Guangzhou,China)

机构地区：[1]江苏省地震局,中国南京210014 [2]广东省水文地质大队,中国广州510510

出　　处：《地震学报》2023年第4期685-694,共10页Acta Seismologica Sinica

基　　金：地震科技星火计划项目(XH22001YC);江苏省地震局局长基金项目(202201)联合资助

摘　　要：提出长短极距比值干扰源定位方法用来定位地电观测中出现的地表干扰源。该方法基于均匀半空间模型且地表干扰为点电源,利用地表不同位置的干扰源所引起的同测向长短极距的电场变化差异,联合多测向比值来定位干扰源位置,并应用到徐庄子台漏电干扰一例和高邮台偶极源试验中。结果表明:利用长短极距比值法,能有效定位干扰点源,且能定位偶极干扰源的其中一个电极。The long and short pole distance ratio method in geoelectric observation is employed here to locate the near-surface disturbance sources,on the assumption of a uniform half-space model and that the near-surface disturbance is a point source.The disturbance sources of different locations can cause different increments in the long-pole-distance and short-pole-distance geoelectric field at the same direction,which is the key mind of this method.By combining multi-directional long-and-short pole distance ratios in geoelectric field,we successfully applied this method into locating the disturbance sources of the leakage at Xuzhuangzi station and the dipole source test at Gaoyou station.The results show that the point source producing the interference in geoelectric field at Xuzhuangzi station can be effectively located,and one electrode of the dipole source can be discovered in the Gaoyou station test as well.

关 键 词：地电场 点干扰源 长短极距比值法 定位 

分 类 号：P319.3[天文地球—固体地球物理学]