«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年02期

页码:

229-236

栏目:

出版日期:

2025-02-10

文章信息/Info

Title:

Application of the Load/Unload Response Ratio Method to the Calculation of Ground Strain in Tianjin

作者:

张磊¹; 岳 冲²; 宋程¹; 余怀忠²

(1.天津市地震局,天津 300201; 2.中国地震台网中心,北京 100045)

Author(s):

ZHANG Lei¹; YUE Chong²; SONG Cheng¹; YU Huaizhong²

(1.Tianjin Earthquake Agency,Tianjin 300201,China)(2.China Earthquake Networks Center,Beijing 100045,China)

关键词:

洞体应变;  加卸载响应比;  b值;  天津

Keywords:

cave strain;  Load/Unload Response Ratio;  b-value;  Tianjin city

分类号:

P315.72

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0024

摘要:

从岩石的应力和应变的本构关系出发,利用基于库仑应力触发模型的加卸载响应比计算方法,计算了天津蓟县洞体应变和小辛庄洞体应变的加卸载响应比值,并依据孕震尺度与震级关系选取震例,结合伸缩应变原始观测数据的趋势性变化特征和天津及周边地区b值扫描结果开展了综合分析。结果表明:① 2020年河北古冶M_S5.1地震前小辛庄洞体应变两分量出现了明显的拉张应变加速、震后减弱现象,加卸载响应比值在该时段内同样出现了先增大后减小的异常变化; ② 2018—2019年天津小辛庄周边区域出现了明显的低b值异常区,且上述结果在时、空上呈现出较好的一致性。

Abstract:

According to the stress-strain constitutive relationship of rock,the Load/Unload Response Ratio(LURR)method based on the Coulomb stress triggering model is used to calculate LURR values of the cave strain observed at Jixian seismic station and on Xiaoxinzhuang monitoring spot in Tianjin city.Earthquake cases are selected according to the relationship between the seismogenic range and the magnitude.Variation trend of the observational strain data is analyzed and b-values in Tianjin city and its vicinity are calculated.Results indicate that before the Guye M_S5.1 earthquake in Hebei province,the tension strain in NS and EW component on Xiaoxinzhuang spot sped up,then slowed down after the Guye earthquake.In the meantime,LURR values of the strain on Xiaoxinzhuang spot and its surrounding areas increased,and then decreased.In addition,there was obviously a low b-value region around Xiaoxinzhuang spot from 2018 to 2019.All these precursory anomalies were consistent in time and space.

参考文献/References:

姜佳佳,冯建刚.2021.2017年九寨沟7.0级地震前应力状态及b值异常特征研究[J].地震工程学报,43(3):574-582.
Jiang J J,Feng J G.2021.Stress state and b-value anomalies before the Jiuzhaigou M_S7.0 earthquake in 2017[J].China Earthquake Engineering Journal,43(3):574-582.(in Chinese)
雷生学,刘建波,闫伟,等.2021.岩体完整性对载荷干扰定量分析的影响——以天津小辛庄应变为例[J].地震地质,43(6):1600-1613.
Lei S X,Liu J B,Yan W,et al.2021.Influence of rock integrity on quantitative analysis of external load disturbance:A case study of Xiaoxinzhuang strain,Tianjin[J].Seismology and Geology,43(6):1600-1613.(in Chinese)
刘子璇,冯建刚,张苏平.2019.地震b值研究进展综述[J].高原地震,31(4):9-13.
Liu Z X,Feng J G,Zhang S P.2019.The progress on b-value of earthquake[J].Plateau Earthquake Research,31(4):9-13.(in Chinese)
彭克银,尹祥础,和锐.2003.用临界点理论讨论应变能加速释放现象与孕震区尺度[J].中国地震,19(4):425-430.
Peng K Y,Yin X C,He R.2003.Acceleration strain release and earthquake genesis scaling exponents from critical point hypothesis[J].Earthquake Research in China,19(4):425-430.(in Chinese)
宋治平,尹祥础,陈学忠.1996.加卸载响应比的时空演变特征及其对地震三要素的预测意义[J].地震学报,18(2):179-186.
Song Z P,Yin X C,Chen X Z.1996.Spatial-temporal evolution characteristics of Load-Unload Response Ratio and its prediction significance for the three elements of earthquake[J].Acta Seismologica Sinica,18(2):179-186.(in Chinese)
王海涛,彭克云,张永仙,等.1998.新疆伽师强震群过程中加卸载响应比变化特征[J].科学通报,43(10):1109-1112.
Wang H T,Peng K Y,Zhang Y X,et al.1998.The variation characteristics of Load-Unload Response Ratio during Jiashi strong earthquake swarm in Xinjiang[J].Chinese Science Bulletin,43(10):1109-1112.(in Chinese)
解孟雨,孟令媛.2021.川东南长宁地区地震活动及b值演化特征[J].中国地震,37(2):494-507.
Xie M Y,Meng L Y.2021.Seismicity and evolution characteristics of b-values of Changning area in southeastern region of Sichuan Basin[J].Earthquake Research in China,37(2):494-507.(in Chinese)
徐志国,梁姗姗,郭铁龙,等.2021.2020年7月12日唐山古冶M_S5.1地震震源参数[J].地震地磁观测与研究,42(3):25-33.
Xu Z G,Liang S S,Guo T L,et al.2021.Source parameters of Guye M_S5.1 earthquake in Tangshan on July 12,2020[J].Seismological and Geomagnetic Observation and Research,42(3):25-33.(in Chinese)
许延军,张学辉,曹勇,等.2022.门源6.9级地震前地应变加卸载组响应比异常分析[J].地震工程学报,44(3):707-712.
Xu Y J,Zhang X H,Cao Y,et al.2022.Load/Unload Response Ratio anomalies of strain before the Menyuan M_S6.9 earthquake[J].China Earthquake Engineering Journal,44(3):707-712.(in Chinese)
尹祥础.2004.地震预报的新途径——加卸载响应比理论[J].力学与实践,26(6):1-7.
Yin X C.2004.A new approach to earthquake prediction-Load/Unload Response Ratio(LURR)theory[J].Mechanics in Engineering,26(6):1-7.(in Chinese)
尹祥础.2015.加卸载响应比理论及其应用[M].北京:科学出版社.
Yin X C.2015.Theory and application of Load-Unload Response Ratio[M].Beijing:Science Press.
余怀忠.2006.地震前兆物理模型与地震预测初步研究[D].北京:中国地震局地质研究所.
Yu H Z.2006.Preliminary studies on mechanical models of earthquake precursors and earthquake prediction[D].Beijing:Institute of Geology,China Earthquake Administration.
岳冲,牛安福,余怀忠,等.2020.九寨沟M_S7.0地震前地应变LURR异常演化特征[J].中国地震,36(2):267-275.
Yue C,Niu A F,Yu H Z,et al.2020.Evolutionary characteristics of ground strain LURR anomaly before Jiuzhaigou M_S7.0 earthquake[J].Earthquake Research in China,36(2):267-275.(in Chinese)
Gutenberg B,Richter C F.1950.Seismicity of the Earth and associated phenomena[J].Tellus,2(1):68-68
Yu C,Wang S Y,Yu H Z.2022.Study of the electromechanical coupling process before the 2020 M_S6.4 Yutian,China earthquake[J].Scientific Reports,12(1):17622.
Yu H Z,Yu C,Ma Z,et al.2020.Temporal and spatial evolution of Load/Unload Response Ratio before the M7.0 Jiuzhaigou earthquake of Aug.8,2017 in Sichuan Province[J].Pure and Applied Geophysics,177(16):321-331.
Yu H Z,Zhou F R,Zhu Q Y,et al.2016.Development of a combination approach for seismic hazard evaluation[J].Pure and Applied Geophysics,173(1):221-233.
Yue C,Ji P,Wang Y L,et al.2022.Evolution characteristics and mechanism of the Load/Unload Response Ratio based on strain observation before the Jiuzhaigou M_S7.0 earthquake[J].Frontier in Earth Science,10:1-10.

备注/Memo

备注/Memo:

收稿日期:2024-05-24.
基金项目:国家自然科学基金联合基金(U2039205); 天津市地震局重点科研项目(zd202402).
第一作者简介:张 磊(1982-),高级工程师,主要从事地壳形变监测与预测相关研究.[DW]E-mail:zhanglei-qd@126.com.
通信作者简介:岳 冲(1989-),副研究员,主要从事地壳形变监测与数值模拟研究.[DW]E-mail:dacongyue@126.com.

常用功能

更新日期/Last Update: 2025-03-10