摘要
巴东野三关地区的微震活动具有间歇性、低频特征,分布于长江、清江分水岭——香龙山背斜南侧。通过对该区近年来微小地震震源参数研究表明:其成因不同于天然地震和水库诱发地震,似乎是由于长期开采煤矿,使地表浅层应力集中、应变累积,导致岩体失稳而产生的采矿诱发地震。
The micro-earthquakes in Yesanguan region have the features of intermittency and low frequency. They distribute on the south side of Xianglong hill anticline——the watershed between Yangtze river and Qingjiang river. Having studied the parameters of the micro-earthquakes in recent years, we find that the genesis is different from the natural earthquake and reservoir earthquake. It seems to be caused by the occurrence of coal mining goaf where the shallow layer＇s stress of the earthsurface converges and strain accumulates, leads the rock body become unstable and induce these earthquakes.
出处
《大地测量与地球动力学》
CSCD
北大核心
2007年第F06期62-66,92,共6页
Journal of Geodesy and Geodynamics
基金
中国科技部社会公益研究专项(2004DIB3J131)
长江三峡工程开发项目
关键词
微震
地震成因
地质构造
震源参数
诱发地震
micro-earthquake, seismogenesis, geologic structure, focal parameter, induced earthquake
