河道型水库蓄水诱发地震的数值模拟

doi:10.7523/j.issn.2095-6134.2011.1.004

中国科学院大学学报 ›› 2011, Vol. 28 ›› Issue (1): 19-26.DOI: 10.7523/j.issn.2095-6134.2011.1.004

河道型水库蓄水诱发地震的数值模拟

曹建玲^1,2, 石耀霖²

1. 中国地震局地震预测研究所,北京 100036;
2. 中国科学院研究生院计算地球动力学实验室,北京 100049

收稿日期:2010-01-18 修回日期:2010-05-14 发布日期:2011-01-20
基金资助:
国家自然科学基金(40574021)和中国地震局地震预测研究所基本科研业务专项(02092431)资助 

Numerical study on channel reservoir induced earthquake

CAO Jian-Ling^1,2, SHI Yao-Lin²

1. Institute of Earthquake Science, Chinese Earthquake Adiministration,Beijing 100036,China;
2. Laboratory of Computational Geodynamics, Graduate University, Chinese Academy of Sciences, Beijing 100049,China

Received:2010-01-18 Revised:2010-05-14 Published:2011-01-20

摘要/Abstract

摘要：

利用二维弹性有限元模型,计算了河道型水库蓄水造成的地应力变化,进而计算了走向平行于水库长轴的不同倾角断层面上库仑应力变化,以此来评价水库蓄水对库区断层稳定性的影响.结果表明,蓄水增加的压应力非常有限;如果背景应力场有利于正断层活动,蓄水可能会导致一定深度和倾角的断层更加危险;如果背景应力场有利于浅表的逆断层活动,蓄水会抑制不同倾角的逆断层活动.

关键词: 水库蓄水, 水库地震, 库仑应力变化, 地震危险性

Abstract:

We modeled the impoundment induced stress change in channel reservoir by two-dimensional finite element method.We calculated Coulomb failure stress change on the fault striking parallel to the major axis of reservoir.Compared to the regional stress field,the compressive stress caused by impoundment is small and is most confined within several kilometers depth.If the background stress is in favor of normal faulting some faults with certain dips and depths would come closer to failure,while if the background stress is in favor of shallow thrust those thrusts would be safer after reservoir impoundment.

Key words: reservoir impoundment, reservoir induced seismicity, Coulomb failure stress change, seismic risk

中图分类号:

P315

曹建玲, 石耀霖. 河道型水库蓄水诱发地震的数值模拟[J]. 中国科学院大学学报, 2011, 28(1): 19-26.

CAO Jian-Ling, SHI Yao-Lin. Numerical study on channel reservoir induced earthquake[J]. , 2011, 28(1): 19-26.

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河道型水库蓄水诱发地震的数值模拟

Numerical study on channel reservoir induced earthquake

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