地电场环境干扰跟踪分析关键问题研究  

STUDY ON KEY PROBLEMS OF TRACKING ANALYSIS OF THE GEOELECTRIC FIELD ENVIRONMENTAL INTERFERENCE

作　　者：龚永俭[1] 张长轩 程立康[1] 王建国[1] 刘学领[1] 徐学恭[1] 康健[1] GONG Yongjian;ZHANG Changxuan;CHENG Likang;WANG Jianguo;LIU Xueling;XU Xuegong;KANG Jian(Tianjin Earthquake Agency, Tianjin 300201, China)

机构地区：[1]天津市地震局,天津300201

出　　处：《高原地震》2020年第1期26-38,共13页Plateau Earthquake Research

基　　金：中国地震局地震科技星火计划攻关项目“天津地球物理台网智能化产出与应用研究”(编号:XH20002)和中国地震局地震监测、预报、科研三结合课题“利用地磁相对记录对比研究天津地区地电场变化特征”(CEA-JC/3JH-170308)联合资助。

摘　　要：从机理出发,对雷电、降雨、灌溉、设备漏电、高压直流输电以及城市轨道交通等6种主要环境因素对地电场影响的特征进行分析,在此基础上对相关数据跟踪分析记录形成的关键问题进行了讨论,结果表明:①自然环境因素与场环境因素对地电场的影响途径主要均是通过叠加或削减的方式对场地地电场场强的真实改变;②降雨、灌溉对地电场影响均系改变场地表层电性,从而影响地电场场强变化,而设备漏电、高压直流输电和城市轨道交通影响归根结底都是漏电方式,影响特征有具有较强的相似度,数据跟踪分析记录当然也有许多共性之处;③对环境因素影响的地电场数据跟踪分析中,数据类型的选择要依据地电场受影响的变化特征及影响机理,数据变化描述要交待数据变化时间段、形态及变幅,还要与影响事件作关联性分析,从而准确把握干扰的现象与本质。Starting from the mechanism,this paper analyzes the characteristics of the influence of six main environmental factors of the geoelectric field,such as lightning,rainfall,irrigation,equipment leakage,HVDC,urban rail transit,etc.on this basis,it discusses the key problems of the formation of relevant data tracking analysis records.The results show that:①The main ways of the influence of natural environmental factors and field environmental factors of the geoelectric field are The real change of the field strength of the geoelectric field around the electrode by means of superposition or reduction;②Rainfall and irrigation all change the soil around the electrode,so as to affect the change of the field strength of the geoelectric field,while the equipment leakage,high-voltage direct current transmission and urban rail transit are all the leakage ways in the final analysis,and the impact characteristics have strong similarity,of course,the data tracking analysis record also There are many commonalities;③Tracking analysis of geoelectric field data affected by environmental factors,the selection of data type should be based on the change characteristics and influence mechanism of geoelectric field affected,and the description of data change should explain the time period,shape and amplitude of data change,as well as the correlation analysis with influence events,so as to accurately grasp the phenomenon and nature of interference.

关 键 词：地电场 自然环境 场地环境 干扰 跟踪分析 

分 类 号：P319.32[天文地球—固体地球物理学]