关键词: 采矿地震, 诱发地震, 局部地应力, 长江三峡工程

Abstract: The results of observation by intensified seismic network and field investigation indicate that mining induced earthquakes are widely distributed around the Yangtze Gorge Project. To monitor and predict the reservoir induced earthquakes after filling in the future the seismic background should be made clear in the reservoir area before impoundment. Results of investigation show that mining induced earthqaukes are caused by the presence of underground mined out area which makes the stress difference increased and the rock mass failed. These events are quite different from the natural earthquakes. Seismologists and geologists should be careful to distinguish these two types of seismicity in analysing the regional seismic regime and predicting earthquakes as well as in studying the tectonic stress field and active faults.

Key words: Mining earthquake, Induced earthquake, Local crust stress field, Yangtze Gorge Project