Stability Analysis and the Stabilisation of Flexural Toppling Failure

Amini, Mehdi; Majdi, Abbas; Aydan, Ömer

doi:10.1007/s00603-008-0020-2

Cited by 80 publications

(26 citation statements)

References 13 publications

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“…After 1986, based on Goodman and Bray's classification, a lot of research was carried out on blocky and flexural toppling failures (Wyllie 1980;Aydan et al 1989;Aydan and Kawamoto 1992;Adhikary et al 1997;Bobet 1999;Sageseta et al 2001;Adhikary and Guo 2002;Amini 2009;Amini el al. 2009;Aydan and Amini 2009;Brideau and Stead 2009;Majdi and Amini 2011). As mentioned earlier in this paper, the research on toppling failures concentrates mostly on blocky and flexural types.…”

Section: Parameters Dmentioning

confidence: 98%

Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

2012

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Block-flexure is the most common type of toppling failure in rock slopes. In this case, some rock blocks fail due to tensile bending stresses and some overturn under their own weights. In this paper, first, a literature review of toppling failures is summarized. Then, a theoretical model is proposed for rock slopes with a potential for block-flexure toppling instability. Next, a new analytical approach is presented for the stability analysis of such slopes. Finally, a special computer code is developed for a quick stability assessment of the failures based on the proposed method. This code receives the rock slope parameters from the user as the input data and predicts its stability, along with the corresponding factor of safety against the failure, as the output. In addition, two case studies are used for practical verification of the proposed approach and the corresponding computer code as well.

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Section: Parameters Dmentioning

confidence: 98%

Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

2012

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“…The first type is the limit-equilibrium method (Goodman and Bray, 1976;Aydan and Kawamoto, 1992;Amini et al, 2009), which is a simple but robust analytical technique for predicting toppling. The second type is physical modeling, which includes the base friction model (Bray and Goodman, 1981), the tilt table model (Wong and Chiu, 2001) and the centrifuge model (Adhikary et al, 1997;Adhikary and Dyskin, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Under gravity, the interacting rock layers tend to bend toward the excavation side, resulting in different degrees of deflection of the rock layers; this leads to mutual sliding and dislocation, and finally a bending (tensile) stress is induced. Once the bending stress exceeds the tensile strength of the rock layers, fracturing of rock layers will be initiated (Aydan and Kawamoto, 1992;Adhikary et al, 1996;Adhikary and Dyskin, 2007;Amini et al, 2009). Thus, flexural toppling failure is a progressive process that changes from continuous deformation to discontinuous deformation.…”

Section: Introductionmentioning

confidence: 99%

A case study integrating numerical simulation and GB-InSAR monitoring to analyze flexural toppling of an anti-dip slope in Fushun open pit

Zhao

Jin-an

Li³

et al. 2015

Engineering Geology

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Toppling failure of rock slopes is a complicated mode due to a combination of both continuous and discontinuous deformation, especially in dealing with anti-dip rock slopes. In this paper, a novel continuum-based discrete element method (CDEM), which is useful in modeling the entire progressive process from continuous to discontinuous deformation, is proposed to analyze the deformation characteristics, the failure mechanism and the evolution process of a large-scale open pit slope with a typical anti-dip structure. To simulate the slope deformation, the shear strength reduction method (SSR) is adopted to represent the strength degradation of rock mass in the deterioration process. The simulated results are validated using data obtained from a field investigation and continuous monitoring by employing an advanced remote sensing technique called ground-based interferometric synthetic aperture radar (GB-InSAR). To analyze the evolution trend of the anti-dip slope, the subsequent toppling failure mode is predicted using the validated CDEM models. Based on a case study of a slope at the Fushun open pit mine (in Fushun, China), the unique geological structure with various joints and discontinuities, groundwater, intense rainfall, and mining activities are identified as the main triggers for different failure stages. The comparison between the field data and the simulation shows that CDEM accurately depicts the rock deformation and the failure pattern of the studied slope. The proposed numerical modeling techniques can be used for predicting failures of other similar excavated rock slopes. The simulated evolution process and the recorded deformation patterns help engineers to gain a better understanding of rock mass movement of anti-dip slopes, and the presented methodology could be utilized for similar studies and engineering designs.

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“…Cruden (1989) further extended this model to include the effect of the friction angle along the block interfaces and the inclination of the slope. Some more recent studies have been devoted to refining the analytical solutions for block toppling (Liu et al 2008(Liu et al , 2009) and flexural toppling (Amini et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Limit Analysis of Slope Stability by Rigid Finite-Element Method and Linear Programming Considering Rotational Failure

Liu

Zhao

2013

Int. J. Geomech.

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The authors present a numerical limit analysis on the slope stability in this paper using the rigid finite-element method (RFEM). The novelty of this study is the consideration of the rotational component of the centroid velocity for each element, as well as a generalized overturning failure criterion governing the element rotation. By combining the generalized rotation failure criterion with the Mohr-Coulomb failure criterion, the RFEM-based upper and lower bound limit analysis is formulated as a typical primal and dual linear programming problem and is solved effectively by a primal-dual interior-point method. The proposed formulation and methodology are validated by three classical soil or rock slope stability problems. Numerical results confirm the necessity of considering the rotation mechanism in RFEM-based limit analysis for slope stability in order to achieve realistic predictions.

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Stability Analysis and the Stabilisation of Flexural Toppling Failure

Cited by 80 publications

References 13 publications

Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

A case study integrating numerical simulation and GB-InSAR monitoring to analyze flexural toppling of an anti-dip slope in Fushun open pit

Limit Analysis of Slope Stability by Rigid Finite-Element Method and Linear Programming Considering Rotational Failure

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