合肥形变台地电阻率NS向数据异常的解释

doi:10.12196/j.issn.1000-3274.2022.03.013

地震 ›› 2022, Vol. 42 ›› Issue (3): 180-191.doi: 10.12196/j.issn.1000-3274.2022.03.013

合肥形变台地电阻率NS向数据异常的解释

于磊¹, 陈俊², 何康², 刘泽民², 黎哲君³

1.安徽省合肥地震监测中心站, 安徽合肥 231607;
2.安徽省地震台, 安徽合肥 230031;
3.安徽省郯庐大别研究中心, 安徽合肥 230031

收稿日期:2021-07-23 修回日期:2022-01-28 出版日期:2022-07-31 发布日期:2023-03-29
通讯作者: 陈俊, 高级工程师。 E-mail: shanyejunjie@163.com
作者简介:于磊(1983-), 男, 安徽阜阳人, 硕士研究生, 主要从事地震电磁、地震应急、热红外遥感研究。
基金资助:
地震科技星火计划攻关项目(XH20024); 中国地震局地震应急青年重点任务项目(CEA_EDEM-2022); 地震科技星火计划青年项目(XH23021YB)

Explanation for the Anomalies of the Ground Resistivity in NS Direction at Hefei Deformation Station

YU Lei¹, CHEN Jun², HE Kang², LIU Ze-min², LI Zhe-jun³

1. Hefei Earthquake Monitoring Center Station, Hefei 231607, China;
2. Anhui Seismic Station, Hefei 230031, China;
3. Tanlu Dabie Research Center of Anhui Province, Hefei 230031, China

Received:2021-07-23 Revised:2022-01-28 Online:2022-07-31 Published:2023-03-29

摘要/Abstract

摘要： 合肥形变台地电阻率NS向和EW向数据呈反向变化, 但2018年10月至2019年2月两方向数据出现正向变化。经检查NS向供电级和测量极之间有一水塘, 2018年10月水塘进行抽水拉渔致水位大幅降低。此时NS向数据不升高反而降低, 形成似是而非的“悖论”。本文利用有限元数值分析方法计算三维影响系数, 计算结果显示: 合肥形变台NS向电阻率观测, 在地表供电极和测量极之间, 以及沿测线剖面上供电极和测量极之间存在影响系数为负值的近似半椭球区域, 越靠近电极影响系数的绝对值越大。据此得到结论: 此次数据异常变化为水塘抽水引起, 计算结果与实际观测数据变化相同, 从而进行了“解悖”。分析结果可为以后类似问题的解决提供参考。

关键词: 三维影响系数, 有限元, 解悖, 层状介质

Abstract: The earth resistivity always shows reverse change in NS direction and EW direction at Hefei deformation station, however the data of the two directions showed positive change from October 2018 to February 2019. After checking, it is found that there is a reservoir between the NS power supply level and the measuring pole, and in October 2018 the water level of the reservoir was significantly reduced due to pumping. At this time, the resistivity at NS direction did not increase but decrease that formed a paradox. In this paper, the three-dimensional influence coefficient is calculated by using finite element numerical analysis method. The results show that there is a negative region between the supply electrode and the measuring electrode, and a semi-ellipsoid region along the measuring profile. The closer it is to the electrode, the longer the absolute value of influence coefficient becomes. It is concluded that the abnormal change in NS resistivity is caused by the pumping of water from the reservoir, and the calculated results are consistent to the observed data. This result provides reference for solving similar problems in the future.

Key words: Three-dimensional influence coefficient, Finite element, Solution paradox, Layered medium

中图分类号:

P315.7

于磊, 陈俊, 何康, 刘泽民, 黎哲君. 合肥形变台地电阻率NS向数据异常的解释[J]. 地震, 2022, 42(3): 180-191.

YU Lei, CHEN Jun, HE Kang, LIU Ze-min, LI Zhe-jun. Explanation for the Anomalies of the Ground Resistivity in NS Direction at Hefei Deformation Station[J]. EARTHQUAKE, 2022, 42(3): 180-191.

参考文献

[1] 杜学彬. 在地震预报中的两类视电阻率变化[J]. 中国科学: 地球科学, 2010, 40(10): 1321-1330.
DU Xue-bin. Two types of changes in apparent resistivity in earthquake prediction[J]. Science in China: Earth Sciences, 2010, 40(10): 1321-1330 (in Chinese).
[2] 徐锡泉, 高昌志, 王亮. 内蒙古宝昌台地电阻率长期观测数据研究[J]. 地震工程学报, 2014, 36(2): 405-412.
XU Xi-quan, GAO Chang-zhi, WANG Liang. Study on long-term observation data of earth resistivity at Baochang station, Inner Mongolia[J]. Journal of Earthquake Engineering, 2014, 36(2): 405-412 (in Chinese).
[3] 钱家栋, 陈有发, 金安忠. 地电阻率法在地震预报中的应用[M]. 北京: 地震出版社, 1985.
QIAN Jia-dong, CHEN You-fa, JIN An-zhong. Application of earth resistivity method in earthquake prediction[M]. Beijing: Seismological Press, 1985 (in Chinese).
[4] 钱家栋, 曹爱民. 1976年唐山7.8级地震地电阻率和地下水前兆综合物理机制研究[J]. 地震, 1998, 18(增刊): 1-9.
QIAN Jia-dong, CAO Ai-min. Research on comprehensive mechanism of precursors in apparent resistivity and water table associated with 1976 Tangshan earthquake (M=7.8)[J]. Earthquake, 1998, 18(S1): 1-9 (in Chinese).
[5] 钱家栋, 马钦忠, 李劭秾. 汶川M_S8.0地震前成都台NE测线地电阻率异常的进一步研究[J]. 地震学报, 2013, 35(1): 4-17.
QIAN Jia-dong, MA Qin-zhong, LI Shao-nong. Further study on the anomalies in apparent resistivity in the NE configuration at Chengdu station associated with Wenchuan M_S8.0 earthquake[J]. Acta Seismologica Sinica, 2013, 35(1): 4-17 (in Chinese).
[6] Park S K, Van G P. Inversion of pole-pole data for 3-D resistivity structure beneath arrays of electrodes[J]. Geophysics, 1991, 56(7): 951-960.
[7] Lu J, Xue S Z, Qian F Y, et al. Unexpected changes in resistivity monitoring for earthquakes of the Longmen Shan in Sichuan, China, with a fixed Schlumberger sounding array[J]. Physics of the Earth and Planetary Interiors, 2004, 145(1-4): 87-97.
[8] Lu J, Qian F Y, Zhao Y L. Sensitivity analysis of the Schlumberger monitoring array: Application to changes of resistivity prior to the 1976 earthquake in Tangshan, China[J]. Tectonophysics, 1999, 307(3-4): 397-405.
[9] Cook K L, Gray R L. Theoretical horizontal resistivity profiles over hemispherical sinks[J]. Geophysics, 1961, 9(3): 342-354.
[10] 解滔, 卢军. 地电阻率三维影响系数及其应用[J]. 地震地质, 2015, 37(4): 1125-1135.
XIE Tao, LU Jun. Three-dimensional sensitivity coefficient of apparent resistivity and preliminary application[J]. Seismology and Geology, 2015, 37(4): 1125-1135 (in Chinese).
[11] O’Neill D J, Merrick N P. A digital linear filter for resistivity sounding with a generalized electrode array[J]. Geophysical Prospecting, 1984, 32(1): 105-123.
[12] 姚文斌. 电测深数值计算和解释入门[M]. 北京: 地震出版社, 1989.
YAO Wen-bin. Introduction to numerical computation and interpretation of electrical sounding[M]. Beijing: Seismological Press, 1989 (in Chinese).
[13] 李金铭. 地电场与电法勘探[M]. 北京: 地质出版社, 2005.
LI Jin-ming. Geoelectric field and electrical prospecting[M]. Beijing: Geological Publishing House, 2005 (in Chinese).
[14] Lowry T, Allen M B, Shive P N. Singularity removal: A refinement of resistivity modeling techniques[J]. Geophysics, 1989, 54(6): 766-774.
[15] Zhao S K, Yedlin M J. Some refinements on the finite-difference method for 3-D dc resistivity modeling[J]. Geophysics, 1996, 61(5): 1301-1307.
[16] Coggon J H. Electromagnetic and electrical modeling by the finite element method[J]. Geophysics, 1971, 36(1): 132-155.
[17] Dey A, Morrison H F. Resistivity modeling for arbitrarily shaped three-dimensional structures[J]. Geophysics, 1979, 44(4): 753-780.
[18] Li Y G, Spitzer K. Finite element resistivity modeling for three-dimensional structures with arbitrary anisotropy[J]. Physics of the Earth and Planetary Interiors, 2005, 150(1-3): 15-27.
[19] 解滔, 王洪岐, 刘立波, 等. 四平台地电阻率相反年变有限元数值分析[J]. 地球物理学进展, 2014, 29(2): 588-594.
XIE Tao, WANG Hong-qi, LIU Li-bo, et al. Inverse annual variations of apparent resistivity at Siping earthquake station by using finite method[J]. Progress in Geophysics, 2014, 29(2): 588-594 (in Chinese).
[20] 杜学彬, 孙君嵩, 陈军营. 地震预测中的地电阻率数据处理方法[J]. 地震学报, 2017, 39(4): 531-548.
DU Xue-bin, SUN Jun-song, CHEN Jun-ying. Processing methods for the observation data of georesistivity in earthquake prediction[J]. Acta Seismologica Sinica, 2017, 39(4): 531-548 (in Chinese).
[21] 于磊, 陈俊, 刘泽民, 等. 合肥形变台地电阻率观测映震能力分析[J]. 华南地震, 2019, 39(2): 79-85.
YU Lei, CHEN Jun, LIU Ze-min, et al. Seismic reflectivity analysis of ground resistivity observation at Hefei deformation station[J]. South China of Seismology, 2019, 39(2): 79-85 (in Chinese).

合肥形变台地电阻率NS向数据异常的解释

Explanation for the Anomalies of the Ground Resistivity in NS Direction at Hefei Deformation Station

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 13

编辑推荐

Metrics

本文评价

[1]	张熔鑫, 邢会林, 舒涛, 刘骏标, 郭志伟, 王建超, 谭玉阳. 中国地震科学实验场断层系统的三维计算网格模型[J]. 地震, 2023, 43(3): 18-33.
[2]	王熠熙, 邵永新, 李悦, 王博, 刘双庆, 李赫, 王喜龙, 龚永俭. 基于多种方法的宝坻新井水位异常分析[J]. 地震, 2020, 40(1): 172-183.
[3]	郑亮, 张怀, 孙玉军, 程惠红张贝, 石耀霖. 水库触发地震研究中二维与三维有限元模拟结果比较[J]. 地震, 2013, 33(4): 162-171.
[4]	孙玉军, Kwang Ik Kim, 张怀, 石耀霖. 利用有限元方法模拟力学拉伸试验以钢纤维混凝土为例[J]. 地震, 2013, 33(4): 145-152.
[5]	朱伯靖, 刘旭耀, 程惠红, 柳畅, 刘善琪, 任天翔, 李永兵, 石耀霖. 致密砂岩水压瞬态致裂液化格子波尔兹曼及有限元数值研究[J]. 地震, 2013, 33(4): 71-83.
[6]	曹建玲, 王辉, 张晶. 青藏高原下地壳流动方式的数值模拟研究[J]. 地震, 2013, 33(4): 55-63.
[7]	曹建玲, 张晶, 王辉, 方颖. 首都圈现今断层活动方式的数值模拟[J]. 地震, 2013, 33(3): 116-123.
[8]	杨兴悦, 陈连旺, 杨立明, 李玉江. 巴颜喀拉块体周缘几次强震对甘肃地区地震形势的影响[J]. 地震, 2013, 33(3): 77-89.
[9]	胡顺田, 张丽娟, 李瑞东, 张艳芳, 张梅东, 杨建, 熊仲华, 赵永安. 热弹性波在层状介质中传播的一类反射问题的解[J]. 地震, 2010, 30(3): 90-96.
[10]	陈绍林, 张怀, 朱桂芝, 石耀霖. 自转速率快速变化引起的全球位移场和应力场[J]. 地震, 2008, 28(4): 1-12.
[11]	陈玉香, 杜建国, 刘红. 有限元方法在地震孕育过程与前兆机理研究中的应用进展[J]. 地震, 2007, 27(4): 99-109.
[12]	刘杰, 石耀霖, 张国民. 伪三维有限元地震活动模型及其在华北地区的应用^*[J]. 地震, 2001, 21(2): 13-21.
[13]	张东宁, 许忠淮. 中国大陆地壳应变能密度年变化率图像与强震活动关系的初步探讨^①[J]. 地震, 1999, 19(1): 26-32.