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<p>The slope stability of hydropower station after impoundment is a major hidden danger affecting the safety and long-term stable operation of high dam structure. In this paper, the stability of the Xiluodu Hydropower Station slope is analyzed by the combination of micro-seismic monitoring technology and finite element method. The temporal and spatial distribution of the micro-seismic activity and the variation of the micro-seismic energy density are studied. The distribution characteristics of micro-cracks in rock mass of right bank slope and the variation law of slope stress under different water levels are analyzed. The intrinsic relationship between slope stress and micro-seismic events is revealed. The results show that: (1) The micro-seismic activity is positively correlated with the water level. (2) The 580&#xa0;m water level is the sensitive characteristic water level of Xiluodu Hydropower Station. (3) The micro-seismic events of the slope are caused by the change of rock stress. The method of combining the micro-seismic monitoring with the numerical simulation can evaluate the damage of rock mass effectively and predict the potential instability area of the slope. The results of the research are of great significance to the similar underground engineering construction.</p>

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Analysis of the slope damage characteristics of the Xiluodu Hydropower Station during the impoundment period

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • K. Ma,
  • D. Y. Guo,
  • J. Wu,
  • R. L. Wang,
  • H. L. Huang,
  • S. C. Zhang,
  • G. He

摘要

The slope stability of hydropower station after impoundment is a major hidden danger affecting the safety and long-term stable operation of high dam structure. In this paper, the stability of the Xiluodu Hydropower Station slope is analyzed by the combination of micro-seismic monitoring technology and finite element method. The temporal and spatial distribution of the micro-seismic activity and the variation of the micro-seismic energy density are studied. The distribution characteristics of micro-cracks in rock mass of right bank slope and the variation law of slope stress under different water levels are analyzed. The intrinsic relationship between slope stress and micro-seismic events is revealed. The results show that: (1) The micro-seismic activity is positively correlated with the water level. (2) The 580 m water level is the sensitive characteristic water level of Xiluodu Hydropower Station. (3) The micro-seismic events of the slope are caused by the change of rock stress. The method of combining the micro-seismic monitoring with the numerical simulation can evaluate the damage of rock mass effectively and predict the potential instability area of the slope. The results of the research are of great significance to the similar underground engineering construction.