Influence of tensile strength on toppling failure in centrifuge tests

Alzo’ubi, Abdel Kareem; Martin, C. Derek; Crudën, D. M.

doi:10.1016/j.ijrmms.2010.05.011

Cited by 100 publications

(23 citation statements)

References 16 publications

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“…A lot of research has been conducted on the dynamic response of rock slopes since the Wenchuan earthquake on 12 May 2008, e.g., the centrifuge test [24,25] and shake table test [26]. The latter one will be adopted to put forward a comparative study with the presented analytical solution.…”

Section: An Application Research On An Anti-dip Rock Slope Model Undementioning

confidence: 99%

An Analytical Solution for Block Toppling Failure of Rock Slopes during an Earthquake

Guo

Yang

et al. 2017

Applied Sciences

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Toppling failure is one of the most common failure types in the field. It always occurs in rock masses containing a group of dominant discontinuities dipping into the slope. Post-earthquake investigation has shown that many toppling rock slope failures have occurred during earthquakes. In this study, an analytical solution is presented on the basis of limit equilibrium analysis. The acceleration of seismic load as well as joint persistence within the block base, were considered in the analysis. The method was then applied into a shake table test of an anti-dip layered slope model. As predicted from the analytical method, blocks topple or slide from slope crest to toe progressively and the factor of safety decreases as the inputting acceleration increases. The results perfectly duplicate the deformation features and stability condition of the physical model under the shake table test. It is shown that the presented method is more universal than the original one and can be adopted to evaluate the stability of the slope with potential toppling failure under seismic loads.

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Section: An Application Research On An Anti-dip Rock Slope Model Undementioning

confidence: 99%

An Analytical Solution for Block Toppling Failure of Rock Slopes during an Earthquake

Guo

Yang

et al. 2017

Applied Sciences

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“…Existing research data and physical simulation experiments (Hürlimann et al 2006;Tatone and Grasselli 2010;Alzo'ubi et al 2010) suggest that two potential slip surfaces are critical to the evolution of the failure of an antidip slope: surface collapse and deep landslide, respectively. This was the case in the current slope.…”

Section: Evolution Mode Of Toppling Deformationmentioning

confidence: 99%

“…Physical modelling was also performed to study the mechanism of toppling failure; tilting table (Simoneit et al 1997); bottom friction testing (Bray and Goodman 1981;Aydan and Kawamoto 1992); centrifuge testing (Adhikary et al 1996;Zhang et al 2007;Alzo'ubi et al 2010). However, previous studies primarily focused on the LEM and physical modeling; hence, our knowledge of the progressive evolution of slope failure is limited.…”

Section: Introductionmentioning

confidence: 99%

Rock slope deformation mechanism in the Cihaxia Hydropower Station, Northwest China

Zhang

Liu

et al. 2014

Bull Eng Geol Environ

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Complex block-flexure slope toppling is observed in interbedded sandstone and slate in the upper Yellow River, China. Block toppling is observed in the relatively hard sandstone and flexural toppling is observed in the relatively soft slate. The evolution of toppling slope deformation is characterized by long-term progress and spatial variability. In order to study these characteristics, field investigations, adit prospecting, borehole drilling, sonic tests and numerical simulation were carried out. In addition, the effect of the structure, the composite mode of the rock mass, the unloading fissures and geomorphology are discussed. Furthermore, we explored the toppling mechanisms and simulated it numerically; on this basis, the slope evolution is divided into four stages. Results obtained from the numerical simulation compared well with field investigation data (investigation data, rock sonic survey and strata dip statistics). Comparative studies have demonstrated that the analytical methods presented in this paper are appropriate for back analysis of the toppling evolution process. The result showed that this toppling slope has not yet entered the later progressivity failure stage and is currently limited to collapse at shallow levels, whereas the deep-seated rock mass will remain stable for a long time. This study might provide reference for a stability evaluation and hazard prevention analysis for rock toppling.

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“…This can cause mined-out areas to collapse instantaneously, directly threatening overall slope stability and the lives of the miners. In recent years, extensive research has been carried out into mined-out areas under slopes with regard to such factors as the influence of the mined-out area on slope stability, the critical safety thickness of the roof of the mined-out area, and treatment methods for the mined-out area [7][8][9][10][11][12][13]. Hoek proposed that failure would take the form of progressive caving and that steeply dipping slopes are prone to topple when an inclined ore body is mined out; he proposed a limit equilibrium method for slope stability analysis [14].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Critical Safety Thickness for Pretreatment of Mined‐Out Areas Underlying the Final Slopes of Open‐Pit Mines and the Effects of Treatment

Tao

Zhu

et al. 2018

Shock and Vibration

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Where a mined-out area underlies a slope, it is a direct threat to slope safety and stability. This is of particular concern where a mined-out area underlies the slope of an open-pit mine, and it has a serious impact on the design and safety measures used for the mine. If a mined-out area underlying the final slope of an open-pit mine is not treated adequately and at the appropriate time, it may cause the slip failure of the final slope during the service life of the mine, posing a serious threat to the safety of personnel and equipment during the stripping phase. In light of the potential for such problems, this paper analyzes the instability mode and failure characteristics of an open-pit slope near a mined-out area in China using geological field survey and the polar stereographic projection method. The scale span method, in combination with engineering analogy and consideration of openpit mining technology, is then used to determine the critical safety thickness at which pretreatment of mined-out areas should be carried out. A pretreatment process to infill the mined-out area during construction of open-pit mine steps is put forward, and its effects on slope stability and reliability are comprehensively evaluated. The results show that circular sliding is the most appropriate instability mode for a slope near a mined-out area. The failure initiates through breakage in the roof of the mined-out area, which induces subduction sliding of the free face of the slope at the left boundary of the mined-out area and subsequent failure of the entire regional slope. Comprehensive analysis methods are used to determine that the critical safety thickness at which a mined-out area under the final open-pit slope should be pretreated is 24 m. The recommended treatment countermeasure is to transfer filling slurry into the mined-out area through drilling holes in benches. This can satisfy the stability and reliability requirements for the slope under different working conditions.

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Influence of tensile strength on toppling failure in centrifuge tests

Cited by 100 publications

References 16 publications

An Analytical Solution for Block Toppling Failure of Rock Slopes during an Earthquake

An Analytical Solution for Block Toppling Failure of Rock Slopes during an Earthquake

Rock slope deformation mechanism in the Cihaxia Hydropower Station, Northwest China

Analysis of the Critical Safety Thickness for Pretreatment of Mined‐Out Areas Underlying the Final Slopes of Open‐Pit Mines and the Effects of Treatment

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