| 紫坪铺水库对附近断层稳定性影响的探讨 |
| |
| 引用本文： | 张贝,石耀霖.紫坪铺水库对附近断层稳定性影响的探讨[J].中国科学院研究生院学报,2010,27(6):754-760. |
| |
| 作者姓名： | 张贝 石耀霖 |
| |
| 作者单位： | 中国科学院研究生院计算地球动力学重点实验室,北京,100049 |
| |
| 基金项目： | 地壳深部探测专项SinoProbe- 07资助 |
| |
| 摘 要： | 汶川地震的发生与其附近的紫坪铺水库是否有关是一个引起国际关注的问题.考虑水库的实际形状和蓄水深度,使用半无限空间的解析解,分析讨论了水库蓄水和放水过程对周围区域断层稳定性的影响.结果表明,对于倾角较小的断层面,水库放水使库区下方近地表的库仑应力有明显增加,增量达到0.2MPa,远离水库区域的库仑应力呈现象限性特征,而且随着距离的增加迅速减小.汶川地震震源落在蓄水时库仑应力减小、放水时库仑应力增加的区域内,但由于距离水库较远的原因,汶川地震前放水时库仑应力的增量只有0.005MPa左右.
|
| 关 键 词： | 紫坪铺 汶川 Boussinesq 解析解 库仑应力 地震触发 水库 |
| 收稿时间： | 2010-04-22 |
A discussion on the influences of Zipingpu reservoir on the stability of faults in the neighborhood |
| |
| ZHANG Bei,SHI Yao-Lin.A discussion on the influences of Zipingpu reservoir on the stability of faults in the neighborhood[J].Journal of the Graduate School of the Chinese Academy of Sciences,2010,27(6):754-760. |
| |
| Authors: | ZHANG Bei SHI Yao-Lin |
| |
| Institution: | Laboratory of Computional Geodynamics, Graduate University, Chinese Academy of Sciences, Beijing 100049,China |
| |
| Abstract: | Whether the Zipingpu reservoir triggered the 5.12 earthquake has attracted international attention. We discuss influences of the artificial load on stability of faults in the vicinity based on the solution of Boussinesq’s problem with the consideration of geometry of the reservoir and real water depth. The results indicate that the static Coulomb stress changes obviously near the surface and its magnitude can be 0.2MPa, but decreases rapidly with distance. The seismic source of the 5.12 earthquake was in the field where the static Coulomb stress changes are positive. However, the magnitude of about 0.005MPa is too small because of the remoteness from the reservoir. We also discuss the distribution of the static Coulomb stress caused by point load on some typical faults. |
| |
| Keywords: | Zipingpu Wenchuan Boussinesq analytic solution the Coulomb stress triggered earthquake reservoir |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国科学院研究生院学报》浏览原始摘要信息 |
| 点击此处可从《中国科学院研究生院学报》下载免费的PDF全文 |
