江宁台井下地电阻率变化初步分析
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P315

基金项目:

中国地震局地震科技星火计划(XH19015YSX)、国家自然科学基金(A413740808)共同资助


Preliminary Analysis of Resistivity Variation in Deep-well Observation at the Jiangning Seismic Station
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    江宁台附近地铁可能对地电阻率观测的干扰较大,通过提取江宁台井下地电阻率夜间数据来分析其变化并探讨机理。结果表明:①江宁台井下地电阻率具备一定地表浅层抑制干扰能力,主要干扰源为地铁;②夜间1~3时数据突跳与地铁不定期维护有关;③井下地电阻率观测NS(AB=1000m)和NS(AB=200m)2018年10月开始出现快速下降变化后,江宁台周围地震强度明显增强,认为该变化与S340公路金属护栏无关;④井下地电阻率长趋势下降变化与周围深井水位变化一致,反映了周围区域应力调整的变化;⑤井下地电阻率观测EW(AB=200m)在安徽无为ML 4.1地震前出现的"U"型变化与新建S340公路无关;⑥江宁台井下地电阻率共观测到5次"U"型变化,认为与地震有关的可能性较大。

    Abstract:

    The URRT can cause great impacts on the deep-well resistivity observation. In this paper we analyzed the resistivity variation and discuss the mechanism by extracting the night data of geo-electrical resistivity in Jiangning Seismic Station. The results show that:①the deep-well observation of Jiangning station has good inhibition to surface and shallow interference,and the main source of interference for deep-well observation is the URRT. ②The sudden change of data from 01 to 03 at night is related to the irregular maintenance of the URRT. ③The rapid decline of the deep-well geo-electrical resistivity observation NS(AB=1000m)and(AB=200m)in October 2018may not be related to the metal guardrail of S340 highway,and the earthquake intensity around Jiangning station is obviously enhanced. ④The decrease of the long trend of the deep-well geo-electrical resistivity is consistent with the change of water level in the surrounding deep well,which reflects the change of regional stress adjustment. ⑤The "U" change of the deep-well geo-electrical resistivity EW(AB=200m)before the Anhui Wuwei ML4.1 earthquake is not related to the newly built S340 highway.⑥There are 5 "U" changes in the deep-well geo-electrical resistivity of Jiangning station,which we believe that it is very likely to be related to earthquakes.

    参考文献
    相似文献
    引证文献
引用本文

樊晓春,李伟,鲍海英,董淼,吴帆,袁慎杰.江宁台井下地电阻率变化初步分析[J].中国地震,2020,36(3):594-606

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-10-15
  • 最后修改日期:2020-05-29
  • 录用日期:
  • 在线发布日期: 2020-10-31
  • 出版日期:
您是第位访问者
中国地震 ® 2024 版权所有
技术支持:北京勤云科技发展有限公司