Analytical technique for stability analyses of the rock slope subjected to slide head toppling failure mechanisms considering groundwater and stabilization effects

Bowa, Victor Mwango; Gong, Wenping

doi:10.1186/s40703-020-00133-0

Cited by 10 publications

(3 citation statements)

References 23 publications

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“…The rock block column count started from the lower most of the slope (toe) increasing cumulatively upwards. It has been observed and noted from centrifugal and numerical test models that the base plane tends to be stepped during toppling failure mechanisms [4,8]. This greatly influences the determination of the overall angle of the plane base denoted as ψb.…”

Section: Rock Slope Geometrymentioning

confidence: 99%

Slope Stability Analyses Subjected to Slide Head Toppling Failure Mechanisms

Bowa¹,

Samson²

2024

Current Perspectives on Applied Geomorphology

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It is faulty to analyze the jointed rock slopes’ stability susceptible to a combination of modes of failure composed of sliding around the toe region and toppling of the rock blocks on the upper part of the slope based on the current analytical methods, which are based on assumption that the distribution of the potential failure surface bounding the potential mixed failure runs predictably from crest to toe of the slope. An Analytical model that takes into consideration the kinematic mechanism of the discontinuous rock slope with counter-tilted weak plane subjected to a combination of failure mechanisms involving sliding and toppling has hence been presented in this chapter. This involves an iterative process which involves the calculations of the dimensions of all the individual blocks as well as the forces acting on them, and then stability of every block is examined, starting at the uppermost block. The stability analysis of each block is determined. The blocks may either be stable, topple or slide. The proposed analytical methods could curtail errors incurred due to the acceptance of the single weak plane for quantifying the failure mechanisms composed of slide head toppling rock slopes in physical situations with two planar weak planes.

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Section: Rock Slope Geometrymentioning

confidence: 99%

Slope Stability Analyses Subjected to Slide Head Toppling Failure Mechanisms

Bowa¹,

Samson²

2024

Current Perspectives on Applied Geomorphology

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“…They can form naturally or be constructed by humans. Designing mine slopes is a crucial part of mining operations because it's used to determine the balance between mining cost-effectiveness and operational safety [1]. In designing mine slopes, the design of the groundwater level height is essential, as it's one of the triggers for slope failure due to increased material weight and decreased shear strength of the slope constituents [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Groundwater Level on Slope Stability at Highwall PT. X, South Kalimantan

Setyananda,

Novi Hartami,

Maulana

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Mine slope design is an important part of mining operations because it is used to determine the balance between mine economy and operational safety. In the mine slope design there will also be a groundwater level design, the groundwater level is one of the triggers for a slide to occur. Therefore, this study aims to determine the effect of the groundwater level on the stability of the highwall slope cross section A-A’ as well as to determine the factor of safety value and probability of slope failure under various conditions of high groundwater levels. This research method uses quantitative methods because there are numerical data that will be used to calculate the value of slope stability. Slope stability analysis uses the “morgenstern-price” boundary equilibrium and the “monte-carlo” landslide probability. From the research results it is known that the higher the groundwater level, the lower the safety factor value because the presence of groundwater can reduce slope stability causing a decrease in soil shear strength due to increased pore water pressure. In addition, the weight of the material will increase due to the presence of groundwater, which causes the driving force on the slope to also increase. In addition, the movement of air in the soil can cause seepage forces which can affect slope stability. The lowest safety factor value is at the groundwater level 100% of the overall slope height, in conditions of 100% of the overall slope height, the deterministic safety factor value is 1.337, the mean safety factor is 1.358, and 0% hazard susceptibility.

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“…Combined with a specific case, a fuzzy expert decision‑making system for rock slope block‑toppling modeling and assessment 17 , the Shear Strength Reduction technique was used for numerical analysis and stability assessment of complex secondary toppling failures 18 . The analytical solutions that incorporates the kinematic mechanisms of the jointed rock slope under the influence of groundwater and stabilizing the lowermost block subjected to slide head toppling were derived based on the limit equilibrium 19 . On the basis of the physical model testing, an equation to calculate the stability coefficient under flexural toppling was established with the limit equilibrium method and cantilever beam theory, and the most dangerous potential sliding surface is identified 20 .…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of soft–hard-interbedded anti-inclined rock slope

Guo

2023

Sci Rep

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The instability of rock slope is still a very frequent geological disaster, which seriously affects people's life and production activities. Previous studies have mainly focused on deformation mechanism, prediction, and control of hard rock with single lithology, while there are limited studies on the theoretic computational method of the stability for soft–hard interbedded anti-inclined rock strata. In this study, a geomechanical model for the toppling failure of soft–hard-interbedded anti-inclined rock slope is established. The modes of failure for soft and hard rock strata are analyzed, the computational formula of the downward thrust for each anti-inclined rock stratum is derived, and the stability safety factor of each rock stratum is defined. A theoretical computational method for determining the potentially most dangerous failure surface of soft–hard-interbedded anti-inclined rock slope is proposed. By comparing with the existing research results, the theoretical solving method proposed in this study can well solve the location of the potentially most dangerous failure surface of soft–hard-interbedded anti-inclined rock slope. The potentially most dangerous failure surface of this kind of slope is approximately planar, and the angle between it and the normal plane of the rock strata is an acute angle within 30°. It provides theoretical support for the stability analysis of this kind of slope.

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Analytical technique for stability analyses of the rock slope subjected to slide head toppling failure mechanisms considering groundwater and stabilization effects

Cited by 10 publications

References 23 publications

Slope Stability Analyses Subjected to Slide Head Toppling Failure Mechanisms

Slope Stability Analyses Subjected to Slide Head Toppling Failure Mechanisms

Analysis of the Influence of Groundwater Level on Slope Stability at Highwall PT. X, South Kalimantan

Stability analysis of soft–hard-interbedded anti-inclined rock slope

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