和平地电台深孔地电阻率异常的数值模拟研究  

Research on Numerical Simulation of Deep-hole Geoelectric Resistivity Anomaly in Heping Geoelectric Station

作　　者：严兴[1,2] 邓志辉[2] 刘吉平[2] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]广东省地震局,广东广州510070

出　　处：《地震研究》2015年第4期623-628,698,共6页Journal of Seismological Research

基　　金：广东省省级科技计划项目(2013B020200010)资助

摘　　要：对近两年河源发生的几次地震的地电阻率测值资料进行分析,发现和平地电台的深孔地电阻率测值不同于大多数观测台地电阻率的异常变化,表现为正常时期长趋势下降,地震前转平或上升。对此情况进行了探讨,认为是电极极化及震前导电离子上涌所致;在此基础上建立了有限元模型,并采用数值模拟的方法对此进行印证。Analyzing the measuring value of deep-hole geoelectric resistivity during the earthquakes occurred in Heyuan in the recent two years, we found that be different from the anomaly variation at most geoelectric resistivity sta- tions, the daily mean value curve of deep-hole geoelectric resistivity at Heping station showed the long trend of decline in quiet periods while turning flat or rising before the earthquake. On the basis of analyzing and discussing the data, we believe that the observed changes due to the electrode polarization and the concentration rising changing of conductive particle, which was verified by constructing a three-dimensional finite element model and using the numerical simulation method.

关 键 词：深孔地电阻率 有限元数值模拟 和平地电台 

分 类 号：P319[天文地球—固体地球物理学]