摘要
选取三峡水库2003年6月135 m和2012年175 m蓄水后的典型水库地震活动为例进行水库地震类型分析。135 m蓄水后首发微震群活动为非构造型水库"诱发"地震的例证,成因类型包括岩溶型、矿塌型和浅表应力调整型;2012年175 m蓄水后秭归屈原镇ML3.8地震序列与仙女山断裂和九畹溪断裂关系密切,为构造型水库"触发"地震震例。从库水荷载和渗透作用两方面探讨水库地震发震机理,库水荷载与快速响应型地震关系密切,滞后响应型则主要由库水渗透引起。
This paper takes seismic activities during 135m and 175m water impounding in 2003 and 2012 separately as examples to summarize reservoir earthquake type in the Three Gorges area. Microearthquake swarm after 135m water impounding in June 2003 was a typical case in point of non-tectonic reservoir induced earthquake, which were mainly due to karst collapse, mine-collapse and superficial stress adjustment. And ML3. 8 earthquake sequence in 2012 was a good example of tectonic reservoir triggered earthquake, which was closely related with Xiannvshan fault and Jiuwanxi fault. Water loading is closely related with rapid response, and delay response is mainly caused by water penetration.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第4期77-82,共6页
Journal of Geodesy and Geodynamics
基金
中国长江三峡工程开发总公司专项基金项目(SXSN/3354)
中国地震局地震研究所所长基金项目(IS201102643)
关键词
水库诱发地震
水库触发地震
库水荷载
库水渗透
断裂构造
reservoir induced earthquake
reservoir triggered earthquake
water loading
water infiltrtration
fault structure
