Surface-mining slope reinforcement design based on GeoStudio and FLAC3D
1
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083
2
Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines (Hunan University of Science and Technology), Xiangtan 411201
3
Kunming University of Science and Technology, Faculty of Public Safety and Emergency Management, Kunming 650093
Corresponding author
Zhiquan Yang
Kunming University of Science and Technology, Faculty of Public Safety and Emergency Management, Kunming 650093
Kunming University of Science and Technology, Faculty of Public Safety and Emergency Management, Kunming 650093
Mining Science 2022;29:141-163
KEYWORDS
TOPICS
ABSTRACT
Slope stability of open pit mines has been a hot issue of economic and safety concern. In order to reduce the accidental casualties caused by slope instability, targeted reinforcement solutions should be proposed for them. In this paper, GeoStudio and FLAC3D software were used to model the slope an open pit mine. The safety factors of the slope under natural, rainfall and seismic conditions are analyzed in turn. Additionally, the safety factors derived from different algorithms are compared to mutually verify the reliability of the slope stability analysis. Two sets of reinforcement design solutions—anchor rod and anti-slip pile—are proposed. Then, the two solutions are optimized so that the safety factors of the slope under three conditions reach 1.3, 1.2 and 1.1, respectively, and the optimal solution is selected from the two solutions by combining the economic benefits. The results show that the optimized anchor and anti-slide pile reinforcement solutions result in the safety factors of the slope under different conditions, reaching 1.441, 1.258, and 1.324 and 1.4, 1.238, and 1.23, respectively. The anti-slide pile reinforcement solution is more economical than the anchor reinforcement solution, so it is recommended that the anti-slide pile reinforcement solution should be chosen as the final solution.
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| eISSN: | 2353-5423 |
| ISSN: | 2300-9586 |
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