自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 1    February 2007

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Effective stress analysis method of seismic response for high tailings dam
LIU Hou-xiang(柳厚祥)1, 2, LI Ning(李 宁) 2, LIAO Xue(廖 雪)3, WU Cong-shi(吴从师) 1, PAN Xu-dong(潘旭东) 1

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

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.

 

Key words: tailings dam; seismic response; effective stress; nonlinear analysis; against liquefaction; upstream raising method

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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