地电阻率受高压输电线路架线施工干扰的判定

Judgment of Geo-resistivity Interference Caused by Stringing Construction of High Voltage Transmission Line

针对南京台两套地电阻率观测系统2023年1月9日出现的同步下降阶变,通过观测系统状况检查,自然环境、场地环境因素调查以及时间、空间多尺度多测项联合分析,判定此异常为受高压输电线路架线施工影响而非震兆异常,并对异常机理进行了简单解释。该判定和分析过程对地电阻率数据异常变化核实具有很好的参考价值,也为地电阻率异常数据的分析解释提供一种思路。

Regarding the synchronous decline in the two sets of geo-resistivity observation systems at Nanjing station on January 9,2023,we checked the condition of the observation system,investigated the natural and site environmental factors,as well as conducted multi-scale and multi-item joint analysis in time and space.The results show that this anomaly is affected by the construction of high-voltage transmission lines rather than earthquake precursor anomaly,and the explanation was provided for the abnormal mechanism.The process of analysis and determination of interference has a great reference value for verifying the causes of abnormal changes in geo-resistivity data,and also provides a train of thought for the analysis and interpretation of geo-resistivity abnormal data.