China Safety Science Journal ›› 2021, Vol. 31 ›› Issue (2): 69-75.doi: 10.16265/j.cnki.issn 1003-3033.2021.02.010

• Safety engineering technology • Previous Articles     Next Articles

Significant research on influencing factors of dump stability

ZHANG Meng1,2, LIU Honglei2, QIAO Wenguang3, GAO Xun3   

  1. 1 Environmental Engineering Research and Design Institute, BGRIMM Technology Group Co. Ltd., Beijing 100160, China;
    2 National Engineering Research Center on Mine Water Prevention and Resource, China University of Mining & Technology (Beijing) Beijing 100083, China;
    3 Department of Mine, Institute of Geological Environmental Monitoring of Inner Mongolia, Hohhot Inner Mongolia 010010, China
  • Received:2020-11-20 Revised:2021-01-08 Online:2021-02-28 Published:2021-08-18

Abstract: In order to improve stability of waste dump, takes an open-pit coal mine dump as an example, significant of influencing factors of dump stability based on orthogonal test and strength reduction method were studied. Induced factors of typical dump stability were determined through analysis of collected data and field survey, a true 3D geological model of dump was constructed, inversion verifies and analyzes geotechnical parameters and deformation characteristics of dump, and variation characteristics of stress and displacement inside slope and distribution range of plastic failure zone were obtained. Based on the most dangerous section in real 3D mesh model, an ideal model was built, orthogonal experimental simulation scheme was designed and numerical simulation was carried out, and variance analysis of simulation results was carried out to seek for significant influencing factors.The results show that the number of steps, height of steps, meteorology, hydrology and step angle have a significant influence on the stability of dump.Influence of step width on the stability of dump is significant.

Key words: waste dump, influencing factors of stability, orthogonal test, numerical simulation, variance analysis

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