Stability analysis and optimum reinforcement design for an intense weathered rock slope

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Qi, Kuan^1 ; Tan, Zhuoying^1,2 ; Li, Wen^2

School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, China^1

Key Laboratory of Ministry of Education of China for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing, China^2

关键词: Instability condition;    Numerical simulation method;    Orthogonal experiment;    Reinforcement effects;    Reinforcement measures;    Safety and stabilities;    Safety factor of slope;    Structural character;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012014/pdf
DOI  :  10.1088/1755-1315/64/1/012014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In view of the complex structural characters of Chengmenshan copper mine slope, the slope stability should be analyzed and additional reinforcement measures need to be considered to ensure mining safety. In this paper, the slope model was built and its stability was analyzed by numerical simulation method under nature and dynamic loading state. After that the design of orthogonal experiment was discussed for the key factors which influence the reinforcement effect of anchors with SPSS software, and the primary and secondary relation of factors and the optimal combination were obtained using the range analysis method. Finally, the slope stability with optimal reinforcement measure was tested. The results show that the safety factor of slope under nature state is low and it is in the critical instability condition. Under dynamic loading state, the failure probability of slope increases from 0 to 18% as the seismic magnitude varies from 6 to 8. Primary and secondary sequence of factors that influence the anchor reinforcement effect is the bonding length, anchor installing angle, anchor length at 3rd bench, anchor length at 2nd bench and anchor length at 1st bench .The safety factor of slope reinforced with anchors is larger than 1.1, which could ensure the safety and stability of the slope.