地震地质 ›› 1998, Vol. 20 ›› Issue (4): 349-360.

• 科研简报 • 上一篇    下一篇

长江三峡工程周边地区的采矿诱发地震

胡毓良, 杨清源, 陈献程   

  1. 中国地震局地质研究所, 北京 100029
  • 收稿日期:1997-10-31 修回日期:1998-01-31 出版日期:1998-12-09 发布日期:2009-11-25
  • 基金资助:
    地震科学联合基金资助(93159);中国地震局地质研究所论著97B0070。

MINING-INDUCED EARTHQUAKES IN THE AREA AROUND THE YANGTZE GORGE PROJECT

Hu Yuliang, Yang Qingyuan, Chen Xiancheng   

  1. Institute of Geology, China Seismological Bureau, Beijing 100029
  • Received:1997-10-31 Revised:1998-01-31 Online:1998-12-09 Published:2009-11-25

摘要: 地震观测和实地调查表明,长江三峡工程周缘广泛存在采矿诱发地震。采矿诱发地震主要是由于矿山采空区的出现使浅部地壳差应力增大岩体失稳而产生的,它们不同于天然地震。水库蓄水前应对这些地震的背景进行详细研究。在进行区域地震震情分析和预报、区域应力场及活动断裂研究时应严格加以区别。

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