水库诱发地震孕育与发生过程中超临界流体作用的思考  

Thoughts on Supercritical Effects of Fluids During Genesis and Occurrence of Reservoir-induced Earthquake

作　　者：胡先明[1] 陈巨鹏 

机构地区：[1]四川省地震局,四川成都610041 [2]四川远光实业公司,四川成都610213

出　　处：《华南地震》2012年第B11期15-22,共8页South China Journal of Seismology

基　　金：中国地震局地震科技星火计划项目-瀑布沟水库库区震源物理与诱发地震研究(XH-1022)

摘　　要：阐述易发地震"多震层"中的地下流体有产生二级相变的地质条件,在地下流体二级相变过程中释放出来的能量所产生地质动力使快速地质过程(地震)成为可能。结合在水利建设过程中的实际情况,讨论了在深大断裂附近可能发生地下流体二级相变引发的水库诱发地震。重点关注特定水库蓄水使得其下方可能出现的地下流体变化情况,对于水库诱发地震的监测预测都是十分重要的。在新建水库特别是大型水库时,应当避免在深大断裂附近选择建设水库大坝,以减小诱发水库地震的可能。This paper explains that underground fluid of the seismogenic layer has a geological condition of making second-order phase transition. It is possible to hasten geological process such as earthquake due to the energy released from the process of second-order phase transition of underground fluid. According to practical situation of water conservancy construction, reservoir earthquake induced by second-order phase transition of underground fluid nearby deep fracture was discussed. The change of underground fluid caused by water-impoundment has to be focused on. It is very important to monitor and predict reservoir-induced earthquake. When building a new reservoir, especially large reservoir, reservoir dam should not be located in near deep fracture in order to reduce the possibility of induced-reservoir earthquake.

关 键 词：水库地震 超临界水 二级相变 孕震模型 防灾减灾 

分 类 号：P315.728[天文地球—地震学]