湖南省地下流体井水位对远场大震的同震响应特征分析  

Analysis on Co-seismic Response Characteristics to Teleseism Recorded by Underground Fluid Well Water Level in Hunan

作　　者：沈平 敬少群 姚海东 SHEN Ping;JING Shao-qun;YAO Hai-dong(Hunan Earthquake Agency,Hunan Changsha 410004,China)

机构地区：[1]湖南省地震局,湖南长沙410004

出　　处：《防灾减灾学报》2021年第2期32-38,共7页Journal of Disaster Prevention And Reduction

基　　金：湖南省地震局防震减灾科研项目资助(202003)。

摘　　要：通过分析湖南省地下流体观测井水位对远场大震的同震响应特征,可以得出以下结论,振荡型为湖南省井水位的主要同震响应形态,其次为阶变型和脉冲型。此外,多个观测井在同一次地震中记录到的同震响应以及多个地震在同一观测井中引起的同震响应特征均不相同。分析认为,前者可能与井况、所用仪器、构造环境、水文地质条件等因素有关,后者一方面是因为本区域的局部应力状态已经发生了改变,另一方面也可能是由于地震之后井孔含水层系统的含水层有关参数和水动力条件发生了改变所致。The co-seismic response characteristics to the teleseism at home and abroad recorded by underground fluid well water level in Hunan are analyzed in this paper,the results display that the main co-seismic response form is water earthquake wave in Hunan,sometimes it is water level step or impulsion.The co-seismic response forms caused by the same earthquake differ from one another in different wells,the co-seismic response forms caused by different earthquakes are different in the same well.The analysis showed that the different co-seismic response forms caused by the same earthquake is possibly related to instrument,the inherent frequency of well-aquifer system,structural environment,hydrogeological condition,and et al.The complicated co-seismic responses caused by different earthquakes in the same well maybe influenced by local stress state in the region,or are possibly related to the change of well-aquifer system's hydrodynamic condition and the water-bearing stratum's parameter after some large earthquakes.

关 键 词：井水位 井-含水层系统 同震响应 机理 

分 类 号：P315.72[天文地球—地震学]