The theory of base friction models

Bray, J.W.; Goodman, R.E.

doi:10.1016/0148-9062(81)90510-6

Cited by 91 publications

(22 citation statements)

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“…Cet appareil est basé sur le principe du frot tement de base, qui permet le placement des forces de gravité dans un modèle physique à deux dimen sions par des forces de frottements à la base de celuici. Ce principe a été mis en équation par BRAY et GOODMAN (1981 …”

Section: Mécanisme Du Flambage Des Couchesunclassified

“…D'autre part, l'épaisseur des modèles a été arbi trairement choisie à 2 cm. Toutefois, ce dernier para mètre n'influence pas la valeur de la gravité simulée dans le modèle tel qu'on peut le déduire des équa tions théoriques du principe de la table à frottement (BRAY et GOODMAN, 1981). En ce qui concerne la hauteur H, elle a varié selon l'espace disponible sur la Onze moulages représentant autant de configurations différentes décrites au tableau de la figure 8 ont été effectués.…”

Section: Réalisation Des Essaisunclassified

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Analyse de l’instabilité par flambage des couches à la mine de Grand-Baume, Charbonnages de France

et al. 1992

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RésuméLa communication décrit un mécanisme de flambage des couches rocheuses qui pourrait se produire le long du flanc ouest de la mine à ciel ouvert de Grand Baume au moment où la profondeur maximale d'exploitation sera atteinte. AbstractThe paper describes a three hinge strata buckling mechanism and its influence on the west wallof the Grand-Baume open pit coal mine. The analysis is exten ded to investigate the stability at the projected maximum depth of the pit.In order to study and quantify the failure mechanism, two analysis methods were employed. The first method used the base friction table on which scale models of the slope were represented. The second method made use of the mathematical modelling of the slope stability by means of a limit equilibrium computer program, specific to three hinge strata buckling.Details on the application and the results of the two methods are presented. These are henceforth compared with the field observations at the Grand-Baume mine.

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Section: Mécanisme Du Flambage Des Couchesunclassified

Section: Réalisation Des Essaisunclassified

Analyse de l’instabilité par flambage des couches à la mine de Grand-Baume, Charbonnages de France

et al. 1992

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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). The third type is numerical modeling; these methods include the finite element method (FEM) and discrete element method (DEM), which have been employed to model the toppling of layered rock slopes (Pritchard and Savigny, 1990;Adhikary et al, 1996;Adhikary and Dyskin, 2007;Alejano et al, 2010).…”

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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“…In the area of physical modeling, the base friction models and tilt tables were popular in the 1970s and early 1980s [1][2][3][4]. However, these models were limited to their smallscale that are unable to reproduce the stress state represented by the field.…”

Section: Introductionmentioning

confidence: 99%

Comparisons between centrifuge and numerical modeling results for slope toppling failure

Chen

Gong

et al. 2015

Sci. China Technol. Sci.

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This paper presents series studies on the toppling mechanism by centrifuge tests and numerical simulations. Two different discrete element methods, i.e., the continuum-based discrete element method (CDEM) and the discontinuous deformation analysis (DDA), are adopted. The modeling results show that both the methods can accurately capture the failure modes of the centrifuge tests, including three distinct zones and two failure surfaces. Comparisons are made between the physical test and numerical simulation results. The critical inclination angle of the tilting table where the slope models are fixed on can be moderately predicted by the two methods, with different degrees of precision. The error between the test results and the simulated results is within 1% for the slope models without rock-bridges by both CDEM and DDA. However, it is amplified for the staggered-joint models that simulate the rock-bridges. With DDA, the average error is about 5%, and the maximum error is up to 17%. While with CDEM, the errors for the aligned-joint models are ranged from 1% to 6%, and it is from 10% to 29% for the staggered-joint models. The two numerical methods show the capability in simulating toppling failure of blocky rock mass with and without rock-bridges. The model with rock-bridges which provides a certain bending resistance is more stable than the one without any rock-bridge. In addition, the two failure surfaces were observed, which is different from the common understanding that only one failure surface appears. rock slope model, toppling failure, rock-bridge, centrifuge test, continuum based discrete element method, discontinuous deformation analysis Citation:Chen Z Y, Gong W J, Ma G W, et al. Comparisons between centrifuge and numerical modeling results for slope toppling failure.

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The theory of base friction models

Cited by 91 publications

References 2 publications

Analyse de l’instabilité par flambage des couches à la mine de Grand-Baume, Charbonnages de France

Analyse de l’instabilité par flambage des couches à la mine de Grand-Baume, Charbonnages de France

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

Comparisons between centrifuge and numerical modeling results for slope toppling failure

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