The characterization of rock slope stability using key blocks within the framework of GeoSMA-3D

Wang, Feili; Wang, Shuhong; Hashmi, Muhammad Zaffar; Xiu, Zhanguo

doi:10.1007/s10064-018-1291-9

Cited by 12 publications

(9 citation statements)

References 22 publications

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“…The last and the most updated limit equilibrium method introduced, which has been used extensively and successfully for rock slope stability analysis (for all forms of slip surfaces), is called 'Block theory'. Block theory is widely considered by many researchers because of considering the rock mass geometric conditions and the possibility of probabilistic expansion and statistical function application (Wang et al 2018;Azarafza et al 2020b).…”

Section: Generalized Framework In Limit Equilibrium Analysesmentioning

confidence: 99%

“…This advantage has made the focus on this theorem very robust in stability analysis (Zhang et al 2012;Wang et al 2018). Goodman and Shi (1985), by using the removability theorem, have expressed the tendency trend and motion of the block where a finite block is removable if it can displace in a particular direction without encountering the neighbor cairn.…”

Section: Block Theorymentioning

confidence: 99%

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Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

Azarafza

Akgün

Ghazifard

et al. 2021

International Journal of Digital Earth

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Slope stability is one of the most important topics of engineering geology with a background of more than 300 years. So far, various stability assessment techniques have been developed which include a range of simple evaluations, planar failure, limit state criteria, limit equilibrium analysis, numerical methods, hybrid and high-order approaches which are implemented in two-dimensional (2D) and three-dimensional (3D) space. In the meantime, limit equilibrium methods due to their simplicity, short analysis time, coupled with probabilistic and statistics functions to estimate the safety factor (F.S), probable slip surface, application on different failure mechanisms, and varied geological conditions has been received special attention from researchers. The presented paper provides a review to limit equilibrium methods used for discontinuous rock slope stability analyses with different failure mechanisms of natural and cut slopes. The article attempted to provide a systematic review for rock slope stability analysis outlook based on limit equilibrium approaches.

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Section: Generalized Framework In Limit Equilibrium Analysesmentioning

confidence: 99%

Section: Block Theorymentioning

confidence: 99%

Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

Azarafza

Akgün

Ghazifard

et al. 2021

International Journal of Digital Earth

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“…Based on the block theory and modern computer technique, a three-dimensional numerical software GeoSMA-3D is developed for identifying key blocks [15,48,49]. The main procedures include three dimension discontinuities network simulation, analysis of intersecting lines between discontinuities and surfaces, analysis of primary loops, loops location analysis, isolated loops deleting, relative loop analysis, closed block identification, and key block determination [48,49].…”

Section: Influence On Key Blocksmentioning

confidence: 99%

“…Combining the information of joints derived from ShapeMetriX3D with the block search module in the GeoSMA-3D software, the judgment of block stability and the visualization of key blocks can be achieved. The block search module in GeoSMA-3D can provide the visualization of key blocks, as well as quantitative information such as the safety factor, volume, and sliding surface of key blocks [15,48,49]. The key blocks determined in the original procedure were under static loading.…”

Section: Visualization Of Key Blocksmentioning

confidence: 99%

“…In practice, not only the failure mechanism but the secure method used in the unstable engineering work should be studied. Many publications have shown that the instability of rock engineering is often manifested in the form of the slip of the blocks formed by the intersection of joints [11][12][13][14][15]. The methods used to judge the block stability and determine the key blocks show that block stability is dominated by shear behavior of rock joints.…”

Section: Introductionmentioning

confidence: 99%

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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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Key-Block Theorem Application on Discontinuous Rock Slope Instabilities and Rock Mass Description

Azarafza

Zhu

2022

Lecture Notes in Civil Engineering

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The characterization of rock slope stability using key blocks within the framework of GeoSMA-3D

Cited by 12 publications

References 22 publications

Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

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

Key-Block Theorem Application on Discontinuous Rock Slope Instabilities and Rock Mass Description

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