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Deformation features and failure mechanism of steep rock slope under the mining activities and rainfall

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Abstract

Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations, especially on the steep rock slope. In this paper, using the discrete element method (UDEC), numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city, China. Mechanical parameters of the rock mass have been determined by situ measurements and laboratory measurements. A preliminary site monitoring system has been realized, aiming at getting structure movements and stresses of unstable rock masses at the most significant discontinuities. According to the numerical model calibrated based on the monitoring data, four types of operation conditions are designed to reveal the effect of mining excavation and extreme rainfall on the deformation of the steep rock slope.

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Acknowledgements

This work was financially supported by a grant from China Natural Science foundation (51379112, 51422904), and the National Program on Key Basic Research Project of China (973 Program) (2013CB036002), and the National Natural Science Foundation of China (51309144). The author would like to acknowledge the support and help extended by Researcher Yin Yueping and Wei Yunjie from the Emergency Technical Guidance Center for Geological Disasters of the Ministry of Land and Resources.

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Correspondence to Yi-guo Xue.

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Li, Zq., Xue, Yg., Li, Sc. et al. Deformation features and failure mechanism of steep rock slope under the mining activities and rainfall. J. Mt. Sci. 14, 31–45 (2017). https://doi.org/10.1007/s11629-015-3781-6

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  • DOI: https://doi.org/10.1007/s11629-015-3781-6

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