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

Li, Zhiqiang; Xue, Yiguo; Li, Shucai; Zhang, Lewen; Wang, Dan; Li, Bin; Zhang, Wen; Ning, Kai; Zhu, Jianye

doi:10.1007/s11629-015-3781-6

Cited by 27 publications

(8 citation statements)

References 12 publications

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“…On the other hand, the soil flow lasts for a long time, and the velocity of soil movement is slow during the first 30 min of rainfall. After that, the velocity gradually increases until there is a rapid overall collapse of soil (X. S. Li et al, 2023).…”

Section: Disaster Mechanism and Dynamic Evolution Process Of The Dumpmentioning

confidence: 99%

Investigation on the disaster mechanism and dynamic evolution of a dump slope using experimental and numerical methods: Case study, Kunyang phosphate mine, China

Li,

Hou

et al. 2023

Geological Journal

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Dump slope is mainly attributed to the deep excavation of a mine. In the present work, the dump in Kunyang phosphate mine located in Sanjia Village was investigated. The geographic and geologic settings were first studied according to the field investigation. Aiming at the actual dump scenario, a rainfall system was designed to simulate the process of dump instability induced by rainfall. The novelty lies in conducting comprehensive tests on fundamental parameters, including water content, particle size, compactness, and engineering mechanical properties, through analogous simulation experiments. In addition, the SLIDE software was adopted to analyse the dumps in each mining area and subsequently determine the sliding disaster mode of the dumps in Kunyang phosphate mine. The comparative analysis of the dumps in these different mining areas showed that the dump in No. 6 mining area has a greater factor of safety (FS) and better stability (instability will not occur). Secondly, the stability of the dumps in No. 2, No. 3 and No. 4 is better than that in No. 5, but they have not reached the ultimate equilibrium state (instability will not occur). Nevertheless, the FS of the dump in No. 1 mining area approached or even fell below 1. Thus, it is predicted that a small‐scale landslide disaster may have occurred (instability). Moreover, the dynamic evolution characteristics of dump disasters with different accumulation densities were revealed by model device tests. Finally, the obvious tube surge phenomenon before sliding was observed.

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Section: Disaster Mechanism and Dynamic Evolution Process Of The Dumpmentioning

confidence: 99%

Investigation on the disaster mechanism and dynamic evolution of a dump slope using experimental and numerical methods: Case study, Kunyang phosphate mine, China

Li,

Hou

et al. 2023

Geological Journal

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“…With the technical development in electronic computation, numerical simulation has become a popular and economic way to solve complex geo-engineering problem (Xu and Zhang 2010;Zhang et al 2015;Li et al 2017). This method has been well-known for its powerful data processing capacity and userfriendly interface.…”

Section: Manuscriptmentioning

confidence: 99%

Rainfall affected stability analysis of Maddingley Brown Coal eastern batter using Plaxis 3D

Zhao

You

2020

Arab J Geosci

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Rainfall is a common factor that triggers instability of Victorian brown coal (VBC) open pits which facilitate some of the largest brown coal mining operations. There has been no relevant study on rainfall-induced slope instability of VBC open pits in literature. In this paper, three-dimensional (3D) two-phase (fluid-solid) coupled finite element method (FEM) was employed to investigate the stability of Maddingley Brown Coal (MBC) eastern batter under different rainfall conditions. It was found that the batter tends to lead a circular failure path during large rainfall. With the increase in either precipitation period or rainfall intensity, the deformation, excess pore pressure, active pressure increased, while the matric suction decreased. The hydrostatic force in the confined aquifer underlying the brown coal seam increased during rainfall, meanwhile the resisting force decreased. As a result, the shear strength decreased and thereby the stability of the batter decreased. The safety factor and the critical failure path of the eastern batter simulated in this study were consistent with previous study on the Northern batter. This study is a strong supplement to the literature on rainfall-induced instability of VBC batters. In the meantime, it is significant to provide reference to the application of sophisticated 3D numerical modelling for studying slope instability of brown coal and similar mineral deposits.

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“…In the mountain area, the deformation of the high and steep slopes is often triggered by rainfall, human engineering activities, and so on, which degrades the properties of rock and soil mass in physical, chemical, and mechanical (Li et al 2017 ). Slope unloading is a common geological problem, which brings about the rapid adjustment of the slope stress field and the gradual deformation of rock masses and soil masses (Wen et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

The field survey and deformation characteristics of exit slope of Qingshuigou tunnel in the southwest of China

Wen

Tang

2022

Arab J Geosci

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The stability of the slope under excavation in various engineering is a hot issue, and both engineering disturbances and other internal factors have contributed to the instability of the slope. The study focused on the deformation characteristics mechanism of exit slope of Qingshuigou tunnel in Jiasha Town, Gejiu City, Honghe Prefecture, Yunnan, China. Field survey and monitoring are performed to reveal deformation mechanism of the exit slope, which is associated with hydrogeologic conditions, natural weathering, and excavation activities. The exit slope at the interface of the overburdened layer and bedrock has the possibility of landslide through the joint force of rainfall and artificial construction. According to the deformation characteristics of the exit slope and monitoring analysis, the results indicate that the surface displacement at the back scarp of the exit slope is larger than that at the head scarp of the exit slope. The deep displacement at the back scarp is 2–4 times of that at the head scarp of the slope. Based on the geophysical analysis, the overburdened layer mostly has low resistivity. The deformation mechanism of the exit slope is revealed ultimately based on the combined influences of hydrogeologic conditions, natural weathering, and excavation activities. Based on the deformation characteristics and mechanism of the exit slope, comprehensive stabilization treatment measures are proposed to prevent the exit slope from further deformation.

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

Cited by 27 publications

References 12 publications

Investigation on the disaster mechanism and dynamic evolution of a dump slope using experimental and numerical methods: Case study, Kunyang phosphate mine, China

Investigation on the disaster mechanism and dynamic evolution of a dump slope using experimental and numerical methods: Case study, Kunyang phosphate mine, China

Rainfall affected stability analysis of Maddingley Brown Coal eastern batter using Plaxis 3D

The field survey and deformation characteristics of exit slope of Qingshuigou tunnel in the southwest of China

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