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<p>The commonly used slope stability analysis methods, such as the limit equilibrium method and the strength reduction method based on finite elements, cannot analyze the sliding deformation of the landslide mass after slope instability. This research investigates the instability of the slag yard under extreme conditions (e.g., heavy rainfall and earthquakes) and its potential impact on adjacent structures. In this study, PFC discrete element calculation software is used to implement a case study of the slope of an open-pit coal mine waste site using the discrete element method, and the sliding range and sliding mode of the landslide mass under extreme working conditions are analyzed. The research results show that large deformation and slight landslides have occurred in two dangerous sections of the abandoned slag yard close to the railway; the No. 1 slope section of the abandoned slag yard is 48.2 m away from the railway line, and the maximum horizontal sliding distance of this section under extreme loads is 8.67 m; the No. 2 slope section of the abandoned slag yard is 54 m away from the railway line, and the maximum horizontal sliding distance of this section under extreme loads is 18.58 m. The distance from the railway line after the soil particles of the two simulated slopes fall is still more than 30 meters. It can be considered that if a landslide, collapse or rock rolling occurs on the slope of the slag dump site under extreme load conditions, it will have no impact on the railway line.</p>

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Research on slope sliding range under different working conditions in open-pit coal mine slag dump based on discrete element method

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Gan Liu,
  • Liu Han

摘要

The commonly used slope stability analysis methods, such as the limit equilibrium method and the strength reduction method based on finite elements, cannot analyze the sliding deformation of the landslide mass after slope instability. This research investigates the instability of the slag yard under extreme conditions (e.g., heavy rainfall and earthquakes) and its potential impact on adjacent structures. In this study, PFC discrete element calculation software is used to implement a case study of the slope of an open-pit coal mine waste site using the discrete element method, and the sliding range and sliding mode of the landslide mass under extreme working conditions are analyzed. The research results show that large deformation and slight landslides have occurred in two dangerous sections of the abandoned slag yard close to the railway; the No. 1 slope section of the abandoned slag yard is 48.2 m away from the railway line, and the maximum horizontal sliding distance of this section under extreme loads is 8.67 m; the No. 2 slope section of the abandoned slag yard is 54 m away from the railway line, and the maximum horizontal sliding distance of this section under extreme loads is 18.58 m. The distance from the railway line after the soil particles of the two simulated slopes fall is still more than 30 meters. It can be considered that if a landslide, collapse or rock rolling occurs on the slope of the slag dump site under extreme load conditions, it will have no impact on the railway line.