Research on the Influence of Weak Interlayer in Open‐Pit Slope on Stability

Zhong, Shuheng; Miao, Yinjun

doi:10.1155/2021/4256740

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…Using an analytical solution, Hadi Haghgouei [14] proved that rock pillars inside a slope cause circular shear failure in the soil mass or weak rock mass below and showed that the instability failure of a slope is related to the geometric shapes of rock pillars and the normalized column distance. Zhong Shuheng [15] studied the influence of the dip angle and buried depth of a weak interlayer on slope stability using the limit equilibrium method and clarified their influence mechanism. Da Zheng [16] analyzed the dumping deformation in front of the dam of the Gushui Hydropower Station on the southwest Lancang River and used an indoor centrifugal simulation experiment to reveal the influence of different free-surface conditions on the deep slope dumping deformation.…”

Section: Introductionmentioning

confidence: 99%

Stability and Distribution of Rock Slope under Asymmetric Excavation

Li,

Xiang,

Shen

et al. 2024

Applied Sciences

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The asymmetric excavation unloading activity of a rock slope with a fault has an important influence on the stability of the slope and the division of the surrounding surface influence area. Based on the engineering background of the West Open-Pit Mine in Fushun City, orthogonal testing, K-means clustering, range analysis, and variance analysis were used to study the linkage mechanism of the asymmetric excavation unloading action and the weak structure in the rock slope, as well as their effects on slope stability and the influence area. This analysis showed that the significant factors affecting the stability zones of the north and south slopes were the excavation inclination angles of the opposite slopes. When the excavation inclination of the north slope increased by 10 degrees, the safety factors decreased by 25.9% and 16.6%. When the excavation inclination of the south slope increased by 10 degrees, the safety factors decreased by 13.7% and 1.9%. A second significant factor was the excavation depth. The occurrence of faults in the slope was the main factor affecting the range of slope instability. In order to ensure production safety, the excavation inclination angle of a slope with a fault should be limited to no more than 40°, and the excavation depth of an unstable area with two slopes should be designed to be no more than 450 m. The influence of asymmetric excavation unloading on the stability of a rock slope with a fault structure is expounded. This also provides a theoretical basis for controlling slope stability and influence areas in large-scale open-pit mining projects.

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Section: Introductionmentioning

confidence: 99%

Stability and Distribution of Rock Slope under Asymmetric Excavation

Li,

Xiang,

Shen

et al. 2024

Applied Sciences

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“…Due to the softening effect of water and the swelling characteristics of mudstone in water, the mechanical properties of the weak interlayers are significantly reduced under the influence of rainfall and groundwater, which is prone to rapid disintegration and failure, leading to accelerated instability of the slope rock mass. Such weak interlayers often become the dominant failure surfaces that contribute to slope sliding [1][2][3]. Therefore, it is of significant engineering importance to study the mechanism of immersion degradation of mudstone in weak interlayers.…”

Section: Introductionmentioning

confidence: 99%

Study on Uniaxial Mechanical Behavior and Damage Evolution Mechanism of Water-Immersed Mudstone

Song,

Zheng,

et al. 2023

Sustainability

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The existence of mudstone weak interlayers has a significant impact on the stability of open-pit coal mine slopes. Under the combined influence of rainfall and groundwater, the mechanical properties of the mudstone of weak interlayers deteriorate, leading to a local loss of bearing capacity of the slope and further accelerating the overall instability of the slope. In order to investigate the changes of macroscopic and mesoscopic structures, mechanical failure behavior, and the damage evolution mechanism of water-immersed mudstone, non-destructive water immersion experiments and uniaxial compression experiments were conducted. The results indicate that the main causes of macroscopic structure failure of water-immersed mudstone are the initiation, propagation, and mutual penetration of micro cracks. The mesoscopic structure characteristics of water-immersed mudstone are primarily manifested by increased surface smoothness, increased occurrence of small-scale pores, the presence of a dense network of fissures on the surface, and fusion of mineral unit boundaries. With the increasing immersion time, the quality, relative water content, and peak strain increase, while the uniaxial mechanical parameters and energy parameters decrease. In addition, a statistically damaged constitutive model for mudstone considering the coupling damage of water immersion and low-stress loading was established, and the model is consistent with experimental results. Finally, the water-softening characteristics of mudstone are caused by the propensity of clay minerals to expand and disintegrate upon water contact, changes in pore structure, variations in mineral types and distributions, and the presence of pore water pressure. This study provides valuable insights into the water–rock deterioration mechanism of mudstone and the stability of slopes containing weak interlayers.

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Interpretable Predictions: Machine Learning Approaches to Understand Slope Stability in the Presence of Joint Networks

Singh,

Chakravarty

2023

Springer Proceedings in Earth and Environmental Sciences

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Research on the Influence of Weak Interlayer in Open‐Pit Slope on Stability

Cited by 9 publications

References 4 publications

Stability and Distribution of Rock Slope under Asymmetric Excavation

Stability and Distribution of Rock Slope under Asymmetric Excavation

Study on Uniaxial Mechanical Behavior and Damage Evolution Mechanism of Water-Immersed Mudstone

Interpretable Predictions: Machine Learning Approaches to Understand Slope Stability in the Presence of Joint Networks

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