摘要
九江台2008~2013年洞体温度年变化、气压骤升、集中降雨、抽水和承压含水层卸载引起洞体应变异常幅度为10-9~10-6量级,洞体应变异常机制主要为观测介质的温度效应和山体附加应力的加卸载过程,台站应变观测对局部应力场的敏感性为捕捉地震前兆异常提供了可能性。
The strain abnormity magnitude range is 10^-9-10^-6 from cave temperature＇s annual varying, air pressure rising, heavy rainfall, pumping water and unloading of the pressure-bearing aquifer during 2008 to 2013 at Jiujiang seismic station. The mechanisms of cave strain abnormity primarily are the cave material＇s temperature effect and extra-stress load-uploading process of the observation hill body. Cave strain observation is sensitive to local stress-stain field, and it may provide the opportuni- ty to capture the strong earthquakes＇ precursory abnormity.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第3期537-542,共6页
Journal of Geodesy and Geodynamics
基金
中国地震局地震科技星火计划(XH13014Y)
关键词
洞体应变
异常响应
静力学模型
温度效应
附加应力
cave strain observation
abnormity response
static mechanical model
temperature effect
extra-stress
