Stability analysis of rock wedges with multiple sliding surfaces

Mauldon, Matthew; Ureta, Jorge

doi:10.1007/bf00431234

Cited by 25 publications

(14 citation statements)

References 3 publications

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“…Note, however, that since the SMA models the polyhedra precisely, stability analyses are not limited to these simple sliding models and more complex models (e.g. [20]) can also be employed if desired. The common 'factor-of-safety' metric is then calculated for each event, defined as the ratio of the forces resisting movement to those inducing it.…”

Section: Stability Analysismentioning

confidence: 99%

Polyhedral modelling of underground excavations

Elmouttie

Poropat

Krahenbuhl

2010

Computers and Geotechnics

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Section: Stability Analysismentioning

confidence: 99%

Polyhedral modelling of underground excavations

Elmouttie

Poropat

Krahenbuhl

2010

Computers and Geotechnics

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“…Many efforts have been made in the application of the energy principle to limit analysis of slope stability [30][31][32][33][34][35][36]. Mauldon and Ureta [30] gave up the traditional idea of limit equilibrium analysis, and put forward a new method to solve the slope stability problem based on the principle of minimum potential energy of stability equilibrium system. Donald and Chen [31] proposed a slope stability analysis method that is based on the energy principle.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Progressive Failure Mechanism of Rock Slope with Locked Section Based on Energy Theory

et al. 2020

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Progressive failure in rock bridges along pre-existing discontinuities is one of the predominant destruction modes of rock slopes. The monitoring and prediction of the impending progressive failure is of great significance to ensure the stability of the rock structures and the safety of the workers. The deformation and fracture of rocks are complex processes with energy evolution between rocks and the external environment. Regarding the whole slope as a system, an energy evolution equation of rock slope systems during progressive failure was established by an energy method of systemic stability. Then, considering the weakening effect of joints and the locking effect of rock bridges, a method for calculating the safety factor of rock slopes with a locked section was proposed. Finally, the energy evolution equation and the calculation method of safety factor are verified by a case study. The results show that when the energy dissipated in the progressive failure process of rock bridges is less than the energy accumulated by itself, the deformation energy stored in the slope system can make the locked section deform continuously until the damage occurs. The system energy equal to zero can be used as the critical criterion for the dynamic instability of the rock slope with locked section. The accumulated deformation energy in the slope system can promote the development of the cracks in the locked section, and the residual energy in the critical sliding state is finally released in the form of kinetic energy, which is the main reason for the progressive dynamic instability of rock slopes.

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“…With the shear strength degradation of joints under engineering disturbance, the block stability will be influenced accordingly. Over the years, many methods have been put forward to estimate the block stability and determine the key blocks [33][34][35][36]. The existing investigation mainly analyzed the effects of joint morphology on key blocks [37][38][39], such as the rock bridge and the distribution or the length of joints.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Shear Strength of Rock Joints and Its Influence on Key Blocks

Wang

Xiu

2019

Geofluids

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Shear strength deterioration of rock joints and its induced instability of key blocks subjected to dynamic disturbance constitute the mechanism of many geological disasters such as rockburst, landslide, and rockfall. In this study, the influence of dynamic disturbance on rock joints was quantified in the form of stress, of which model was established by quasistatic method. The dynamic shear strength of rock joints was analyzed theoretically following the Coulomb-Navier criterion and further investigated experimentally by split Hopkinson pressure bar (SHPB) tests with impact velocities of 4.850 m/s, 8.722 m/s, 12.784 m/s, and 16.935 m/s. The effect of engineering disturbance on shear strength of rock joints was measured, and a degradation coefficient was used to describe it quantitatively. Considering the degradation of dynamic shear strength of rock joints and its influence on block stability, the method for determining key blocks under dynamic disturbance was given. Implementing this method into the program of Geotechnical Structure and Model Analysis-3D (GeoSMA-3D) developed by the authors’ team, the visualization of key blocks was achieved. From theoretical analysis and experimental investigation, it was figured out that the shear strength of rock joints is degraded under dynamic disturbance. The degradation of friction angle becomes more sensitive than that of cohesion. Additionally, numerical results show that the number of key blocks was increased with the increasing impact velocities.

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Stability analysis of rock wedges with multiple sliding surfaces

Cited by 25 publications

References 3 publications

Polyhedral modelling of underground excavations

Polyhedral modelling of underground excavations

Analysis of Progressive Failure Mechanism of Rock Slope with Locked Section Based on Energy Theory

Dynamic Shear Strength of Rock Joints and Its Influence on Key Blocks

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