| Effective stress analysis method of seismic response for high tailings dam |
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| 作者姓名： | 柳厚祥 李宁 廖雪 吴从师 潘旭东 |
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| 作者单位： | Institute of Geotechnical Engineering Changsha University of Science and Technology，Institute of Geotechnical Engineering，Xi'an University of Technology，Communications Bureau of Hunan Province，Institute of Geotechnical Engineering，Changsha University of Science and Technology，Institute of Geotechnical Engineering，Changsha University of Science and Technology，Changsha 410076，China Institute of Geotechnical Engineering，Xi'an University of Technology，Xi'an 710048，China，Xi'an 710048，China，Changsha 410011，China，Changsha 410076，China，Changsha 410076，China |
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| 基金项目： | 湖南省自然科学基金;湖南省教育部科学研究基金 |
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| 摘 要： | Based on the analysis method for tailings dam in upstream raising method presently used in metallurgy and nonferrous metals tailings depository in the world, an effective stress analysis method of seismic response for high tailings dam was developed according to the results of engineering geological exploration, static and dynamic test and stability analysis on Baizhishan tailing dam 113.5 m high. The law of generation, diffusion and dissipation of seismic pore water pressure during and after earthquake was investigated, and the results of tailings dam’s acceleration, seismic dynamic stress and pore water pressure were obtained. The results show that the seismic stability and liquefaction resistance of high tailings dam are strengthened remarkably, and the scope and depth of liquefaction area at the top of dam are reduced greatly. The interior stress is compressive stress, the stress level of every element is less than 1.0 and the safety coefficient of every element is greater than 1.0. The safety coefficient against liquefaction of every element of tailing dam is greater than 1.5 according to the effective stress analysis of seismic response by finite element method. The calculated results prove that liquefaction is the main reason of seismic failure of high tailing dams, and the effect of seismic inertia forces on high tailing dams’ stability during earthquake is secondary reason.
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| 关 键 词： | 尾渣坝 地震响应 有效压力 非线性分析 |
| 收稿时间： | 25 May 2006 |
| 修稿时间： | 2006-05-25 |
Effective stress analysis method of seismic response for high tailings dam |
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| Liu Hou-xiang , Li Ning , Liao Xue , Wu Cong-shi and Pan Xu-dong.Effective stress analysis method of seismic response for high tailings dam[J].Journal of Central South University of Technology,2007,14(1):129-134. |
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| Authors: | Liu Hou-xiang Li Ning Liao Xue Wu Cong-shi and Pan Xu-dong |
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| Affiliation: | (1) Institute of Geotechnical Engineering, Changsha University of Science and Technology, Changsha, 410076, China;(2) Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an, 710048, China;(3) Communications Bureau of Hunan Province, Changsha, 410011, China |
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| Abstract: | Based on the analysis method for tailings dam in upstream raising method presently used in metallurgy and nonferrous metals
tailings depository in the world, an effective stress analysis method of seismic response for high tailings dam was developed
according to the results of engineering geological exploration, static and dynamic test and stability analysis on Baizhishan
tailing dam 113.5 m high. The law of generation, diffusion and dissipation of seismic pore water pressure during and after
earthquake was investigated, and the results of tailings dam’s acceleration, seismic dynamic stress and pore water pressure
were obtained. The results show that the seismic stability and liquefaction resistance of high tailings dam are strengthened
remarkably, and the scope and depth of liquefaction area at the top of dam are reduced greatly. The interior stress is compressive
stress, the stress level of every element is less than 1.0 and the safety coefficient of every element is greater than 1.0.
The safety coefficient against liquefaction of every element of tailing dam is greater than 1.5 according to the effective
stress analysis of seismic response by finite element method. The calculated results prove that liquefaction is the main reason
of seismic failure of high tailing dams, and the effect of seismic inertia forces on high tailing dams’ stability during earthquake
is secondary reason.
Foundation item: Projects(03JJY3078, 04JJ40032) supported by the Natural Science Foundation of Hunan Province, China; project(03A006) supported
by Scientific Research Fund of Hunan Provincial Education Department, China |
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| Keywords: | tailings dam seismic response effective stress nonlinear analysis against liquefaction upstream raising method |
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