应力变化与流体(水位、水温、水化学、土壤气等)变化的耦合机理及其在川滇地区地震前兆研究中的应用  

Coupling mechanism of stress variation and groundwater (water level, water temperature, hydrochemistry, soil gas, etc.) and its application in earthquake precursors research in Sichuan and Yunnan regions

作　　者：杨秋野 张艳[1,2,3] 符力耘 张旺[1,2,3] 胡俊华[1,2,3] 黄辅琼 曹呈浩[6] YANG Qiu-ye;ZHANG Yan;FU Li-yun;ZHANG Wang;HU Jun-hua;HUANG Fu-qiong;CAO Cheng-hao(Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Earth Science,Beijing 100029,China;China University of Petroleum(East China),School of Geosciences,Qingdao 266580,China;China Earthquake Networks Center,Beijing 100045,China;College of Transportation Science and Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院地球与行星物理院重点实验室,北京100029 [2]中国科学院大学,北京100049 [3]中国科学院地球科学研究院,北京100029 [4]中国石油大学(华东)地球科学与技术学院,青岛266580 [5]中国地震台网中心,北京100045 [6]南京工业大学交通运输工程学院,南京210009

出　　处：《地球物理学进展》2020年第6期2124-2133,共10页Progress in Geophysics

基　　金：国家自然科学基金(41874161);中国科学院战略性先导科技专项(A类)(XDA14010303);中国科学院青年创新促进会基金(2019069)联合资助。

摘　　要：诸多研究表明,地下流体物理化学性质的变化是地震短临前兆的有效指标.川滇地区是地震前兆反应的敏感区域,前人的诸多研究表明地震前很多地震观测台站有明显的水位、水温、水氡、应变、电磁场等前兆异常.应力变化是影响孕震和地震触发的一个重要因素,流体观测包含有区域应力-应变场和断层活动的信息.本文通过总结梳理认为,解释地震导致的地壳变形时不仅需要考虑静态弹性应变,还需要考虑浅层地表孔隙压(流体)变化导致的同震体应变变化的影响.此外,通过总结发现除了需要研究地下流体和应力变化的耦合机理外,还需要结合含水层介质特征物性参数,并结合与应力变化密切相关的水温、水化、土壤气等数据的收集分析,才可能为探究地震孕育的前兆异常做机理分析铺垫.并且,多个参量的综合观测可以增强地震前兆的可信度以及大家进一步深入探究地震前兆的信心.Many researches showed that stress changes had important effects on the conception and triggering of earthquakes, while observations of groundwater(including water level, temperature, chemistry, soil gas, etc.) could obtain information of regional stress changes and faults activity. In this paper, the information of underground fluid and stress change were collected, the coupling mechanism of stress change and fluid change was summarized, the abnormal change characteristics of earthquakes precursor fluid in Sichuan and Yunnan regions were collected. Finally, we concluded the relationship between stress change and fluid change, and the coupling mechanism of stress change and fluid change. Combined with the analysis of the material parameters of aquifer media, it would be better to study the abnormal mechanism of precursors bred by earthquakes and had a good foundation for earthquake predictions in Sichuan and Yunnan regions.

关 键 词：地下流体(水位、水温、水化学、土壤气等) 应力变化 地震 前兆 川滇地区 

分 类 号：P315[天文地球—地震学]