Hazard Classification and Stability Analysis of High and Steep Slopes from Underground to Open-Pit Mining

Shuai Li, Zeming Zhao, Boyi Hu (), Tubing Yin, Gong Chen and Guohui Chen
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Shuai Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Zeming Zhao: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Boyi Hu: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Tubing Yin: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Gong Chen: Hu Nan Shizhuyuan Non-Ferrous Metal Limited Liability Corporation, Chenzhou 423037, China
Guohui Chen: Hu Nan Shizhuyuan Non-Ferrous Metal Limited Liability Corporation, Chenzhou 423037, China

IJERPH, 2022, vol. 19, issue 18, 1-22

Abstract: The stability of high and steep slopes in open-pit mines is closely related to the mine operations and the lives of the surrounding residents, so it is important to ensure the safety and stability of the slopes. Hazard classification and stability analysis of high and steep slopes under different working conditions are studied using the Shizhuyuan non-ferrous metal mine from underground to open-pit mining as a typical example. Firstly, data on rock mechanics parameters were obtained through site investigation and sampling. Then, the slope model of the open-pit mine was established and some slopes were selected in the model for qualitative and quantitative analysis. The strength reduction method and the limit equilibrium method were used to calculate the safety factor under each working condition and point out the potential instability areas. The results show that the selected slopes are safe and stable under all working conditions. Finally, on the premise of maintaining the safety and stability of the mine, the final slope angle was optimized from the original 45°21′35″ to 55°30′41″ to reduce production costs and increase mining efficiency. The final open-pit boundary that meets the stability requirements was eventually obtained.

Keywords: open-pit mine; slope stability; numerical simulation; angle optimization (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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