Analysis of typical interference and influence factors of Beijing geoelectric field observation network
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摘要: 本文基于数据跟踪分析工作，通过对北京地电台网2015年1月—2020年12月的非正常变化事件记录进行系统整理和汇总分析，研究得出北京地电台网的典型干扰有观测系统故障、自然环境影响、场地环境影响、人为干扰、地球物理事件和不明原因干扰6类。其中，场地环境干扰对地电台网的影响最为严重，占地电台网干扰的75%。场地环境干扰主要影响因素为城市轨道交通、抽水灌溉、设备漏电、工程影响和高压直流输电。开展井下地电观测是减小场地环境干扰的有效办法。研究成果为提高北京地电台网数据观测质量，更好地应用于地震预测研究提供了科学依据和技术参考。Abstract: In this paper, the abnormal event records of Beijing Geoelectric Field Observation Network (BGFON) from January 2015 to December 2020 are processed and analyzed. Based on the data tracking and analysis, it is concluded that the typical disturbances of BGFON include observation system failure, natural environment impact, site environment impact, man-made interference, geophysical event and unknown disturbance. The site environment disturbance has the most serious impact of BGFON, covering 75% of BGFON. The main influencing factors of site environmental disturbance include urban rail transit, pumping irrigation, equipment leakage, engineering influence, and high voltage direct current transmissionpower transmission. Underground deep well geoelectric observation is an effective way to reduce site environmental interference. The research results will help to improve the data observation quality of BGFON, and provide better supportfor earthquake prediction research.
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图 1 北京地电台站分布图
Figure 1. Distribution map of geoelectric field observation stations in Beijing
图 2 北京地电台站布极图
（a） 地电阻率；（b） 地电场
Figure 2. Electrodes arrangement of geoelectric field observation stations in Beijing
（a） Earth resistivity；（b） Geoelectric field
图 3 2017年11月16—18日通州西集台ZD9A-Ⅱ地电场仪主机故障观测曲线
Figure 3. Observation curve of main engine fault of ZD9A-Ⅱ geoelectric field meter at Tongzhou Xiji seismic station in November 2017 from 16 to 18
图 4 平谷马坊台ZD8MI地电阻率仪降雨干扰曲线
Figure 4. Rainfall interference curve of ZD8MI resistivity meter at Pinggu Mafang seismic station
图 5 通州西集台ZD9A-Ⅱ地电场仪雷电干扰曲线
Figure 5. Thunder and lightning interference curve of ZD9A-Ⅱ geoelectric field meter at Tongzhou Xiji seismic station
图 6 通州西集台ZD9A-Ⅱ地电场仪城市轨道交通干扰曲线
Figure 6. Urban rail transit disturbance curve of ZD9A-Ⅱ geoelectric field meter at Tongzhou Xiji seismic station
图 7 延庆张庄台ZD9A-2B地电场仪人为干扰曲线
Figure 7. Man-made disturbance curve of ZD9A-2B geoelectric field meter at Yanqing Zhangzhuang seismic station
图 8 延庆张庄台ZD9A-2B地电场仪地电暴干扰曲线
Figure 8. Geoelectric storm curve of ZD9A- 2B geoelectric field meter at Yanqing Zhangzhuang seismic station
图 9 延庆张庄台ZD9A-2B地电场仪不明原因干扰曲线
Figure 9. Unknown disturbance curve of ZD9A-2B geoelectric field meter at Yanqing Zhangzhuang seismic station
表 1 2015—2020年北京地电台网事件统计
Table 1. Statistics of Beijing geoelectric network incidents from 2015 to 2020
台站名称 仪器名称 测点
编码非正常变化事件记录/条 观测
系统自然
环境场地
环境人为
干扰地球物
理事件不明
原因合计 延庆张庄 ZD8M地电仪 B 2 9 60 1 2 3 77 ZD9A-2B地电场仪 E 18 15 103 9 28 6 179 平谷马坊 ZD8MI地电仪 D 10 8 69 4 91 通州西集 ZD8MI地电仪 G 3 2 83 1 89 ZD9A-Ⅱ地电场仪 F 17 4 140 4 1 2 168 合计 50 38 455 19 31 11 604 
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