地震地电阻率交流观测方法及观测实验
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摘要
介绍地震地电阻率交流观测的原理及方法、观测系统的要求及主要技术指标,并在受地铁干扰严重的江宁台进行实验观测。初步观测结果表明,该系统观测结果与直流观测结果相当,能满足台站实际观测需求,同时达到抗干扰目的。证明采用交流供电方法进行地电阻率观测,能够在较强干扰背景下获取较高的信噪比,很好地抑制城市地铁、轻轨以及其他因素引起的电磁干扰。
In the paper, we describe in detail the observation principle, then introduce the design of a new model AC geo-electrical resistivity measurement system. Finally, we show the preliminary experimental results, carried out in Jiangning observatory, Jiangsu province. These experimental results show that AC geo-electrical resistivity observation method can decrease the electromagnetic interference caused by the environment, meeting geo-electrical resistivity observation requirements.It is proved that the AC geo-electrical resistivity observation method could obtain high signal-noise ratio when working in strong interference observation environment, especially to decrease the interference caused by subway.
In the paper, we describe in detail the observation principle, then introduce the design of a new model AC geo-electrical resistivity measurement system. Finally, we show the preliminary experimental results, carried out in Jiangning observatory, Jiangsu province. These experimental results show that AC geo-electrical resistivity observation method can decrease the electromagnetic interference caused by the environment, meeting geo-electrical resistivity observation requirements.It is proved that the AC geo-electrical resistivity observation method could obtain high signal-noise ratio when working in strong interference observation environment, especially to decrease the interference caused by subway.
引文
[1] 张世中,石航,王兰炜,等.地电台站受城市轨道交通干扰的测试分析与抗干扰措施研究[J].地震学报,2013,35(1):117-124(Zhang Shizhong,Shi Hang,Wang Lanwei,et al.Test Analysis on Disturbances Caused by Urban Rail Transit at Geoelectric Stations and Measures to Reduce Its Influence[J].Acta Seismologica Sinica,2013,35(1):117-124)
[2] 张宇,王兰炜,张兴国,等.相关检测技术在低频交流地电阻率观测中的应用[J].地球物理学进展,2014,29(4):1 973-1 979 ( Zhang Yu,Wang Lanwei,Zhang Xingguo,et al.Application of Correlation Detection Technology in Low-Frequency AC Geo-Resistivity Observation[J].Progress in Geophysics,2014,29(4):1 973-1 979)
[3] 桂燮泰,戴经安,关华平.低频交流电法的试验和研究[J].西北地震学报,1988,10(2):22-28(Gui Xietai,Dai Jing’an,Guan Huaping.Experiment and Discussion on the Low-Frequency AC Method [J].Northwestern Seismological Journal,1988,10(2):22-28)
[4] 张国民,傅承祥,桂夑泰,等.地震预报引论[M].北京:科学出版社,2001(Zhang Guomin,Fu Chengxiang,Gui Xietai,et al.Introduction to Earthquake Prediction[M].Beijing:Science Press,2001)
[5] 傅良魁.电法勘探教程[M].北京:地质出版社,1983(Fu Liangkui.Electrical Exploration Course[M].Beijing:Geological Publishing House,1983)
[6] Zhao J L,Wang L W,Qian J D.Research on Geo-Electrical Resistivity Observation System Specially Used for Earthquake Monitoring in China[J].Earthquake Science,2011,24(6):497-511
[7] 马小溪,张宇,王兰炜,等.地电阻率交流观测中信号检测方法研究[J].地震学报,2015,37(5):853-864(Ma Xiaoxi,Zhang Yu,Wang Lanwei,et al.Signal Detection Method for AC Geo-Resistivity Observation[J].Acta Seismologica Sinica,2015,37(5):853-864)
[8] 杜学彬,薛顺章,郝臻,等.地电阻率中短期异常与地震的关系[J].地震学报,2000,22(4):368-376 (Du Xuebin,Xue Shunzhang,Hao Zhen,et al.On the Relation of Moderate-Short Term Anomaly of Earth Resistivity to Earthquake[J].Acta Seismologica Sinica,2000,22(4):368-376)
[2] 张宇,王兰炜,张兴国,等.相关检测技术在低频交流地电阻率观测中的应用[J].地球物理学进展,2014,29(4):1 973-1 979 ( Zhang Yu,Wang Lanwei,Zhang Xingguo,et al.Application of Correlation Detection Technology in Low-Frequency AC Geo-Resistivity Observation[J].Progress in Geophysics,2014,29(4):1 973-1 979)
[3] 桂燮泰,戴经安,关华平.低频交流电法的试验和研究[J].西北地震学报,1988,10(2):22-28(Gui Xietai,Dai Jing’an,Guan Huaping.Experiment and Discussion on the Low-Frequency AC Method [J].Northwestern Seismological Journal,1988,10(2):22-28)
[4] 张国民,傅承祥,桂夑泰,等.地震预报引论[M].北京:科学出版社,2001(Zhang Guomin,Fu Chengxiang,Gui Xietai,et al.Introduction to Earthquake Prediction[M].Beijing:Science Press,2001)
[5] 傅良魁.电法勘探教程[M].北京:地质出版社,1983(Fu Liangkui.Electrical Exploration Course[M].Beijing:Geological Publishing House,1983)
[6] Zhao J L,Wang L W,Qian J D.Research on Geo-Electrical Resistivity Observation System Specially Used for Earthquake Monitoring in China[J].Earthquake Science,2011,24(6):497-511
[7] 马小溪,张宇,王兰炜,等.地电阻率交流观测中信号检测方法研究[J].地震学报,2015,37(5):853-864(Ma Xiaoxi,Zhang Yu,Wang Lanwei,et al.Signal Detection Method for AC Geo-Resistivity Observation[J].Acta Seismologica Sinica,2015,37(5):853-864)
[8] 杜学彬,薛顺章,郝臻,等.地电阻率中短期异常与地震的关系[J].地震学报,2000,22(4):368-376 (Du Xuebin,Xue Shunzhang,Hao Zhen,et al.On the Relation of Moderate-Short Term Anomaly of Earth Resistivity to Earthquake[J].Acta Seismologica Sinica,2000,22(4):368-376)