Development of a New Experimental Apparatus for the Study of the Mechanical Behaviour of a Rock Discontinuity Under Monotonic and Cyclic Loads

Ferrero, Anna María; Migliazza, M.; Tebaldi, Gabriele

doi:10.1007/s00603-010-0111-8

Cited by 34 publications

(8 citation statements)

References 18 publications

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“…We again consider this to be indicative of enhanced tensile cracking during dynamic loading and short‐lived accommodation of enforced shear along resultant asperities before deformation was focused along the pre‐weakened (“monotonic”) shear band. We also observed a reduction in shear strength to residual values at a considerably lower shear strain than in baseline tests; prolonged post‐peak strength resulting from ongoing asperity degradation observed in baseline tests was not evident in these dynamic tests, likely resulting from, relative to baseline conditions, premature asperity degradation during dynamic loading (Belem et al., 2007; Ferrero et al., 2010), consistent with greater dynamic shear strain accumulation.…”

Section: Discussionsupporting

confidence: 65%

“…The design of our dynamic testing program was informed by critical cracking thresholds that have been widely observed to be consistent across different rock types, expressed relative to σUCS (Cai et al, 2004;Lou et al, 2019). In addition, the key controls on mechanisms of deformation, and so strength and rheology, of fractured rock have been observed to be widely applicable, with a firm theoretical basis and support from empirically validated numerical models (Bahaaddini et al, 2013;Belem et al, 2007;Ferrero et al, 2010;Jafari et al, 2004;Lajtai, 1969aLajtai, , 1969bPatton, 1966;Pereira and de Freitas, 1993). Consequently, it is reasonable to assume that our key findings about the importance of the amplitude of dynamic loading and the degree of shear surface formation in generating asperities of differing character are broadly transferable to a range of lithologies and hillslope settings (Lin et al, 2008).…”

Section: Broader Significancementioning

confidence: 99%

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Controls on Post‐Seismic Landslide Behavior in Brittle Rocks

et al. 2021

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We used novel geotechnical testing to explore mechanisms that control post-seismic hillslope strength and rheology in brittle rocks. The amplitude of dynamic loading can govern the nature of fractures and asperities formed, affecting subsequent shear strength and rheology. The shear deformation mechanism mobilised determines whether post-seismic shear strength increases, decreases or remains unchanged.

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Section: Discussionsupporting

confidence: 65%

Section: Broader Significancementioning

confidence: 99%

Controls on Post‐Seismic Landslide Behavior in Brittle Rocks

et al. 2021

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“…Feng and Yu [82] described the methods for characterising progressive damage of micro-cracks and introduced the concept of direction field of micro-crack expansion. Ferrero et al [83] described mathematical assessment of the rock-joint damage evaluated by a photogrammetric review of the discontinuity while the cyclic rock test was undertaken. Duriez et al [84] classified a continuously nonlinear formulation interaction to express the mechanical behaviour of in-filled rock discontinuities.…”

Section: Review Of the Developed Damage Models In Brittle Materialsmentioning

confidence: 99%

A Novel Damage Model for Strata Layers and Coal Mass

et al. 2020

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Coal burst occurrences are affected by a range of mining and geological factors. Excessive slipping between the strata layers may release a considerable amount of strain energy, which can be destructive. A competent strata is also more vulnerable to riveting a large amount of strain energy. If the stored energy in the rigid roof reaches a certain level, it will be released suddenly which can create a serious dynamic reaction leading to coal burst incidents. In this paper, a new damage model based on the modified thermomechanical continuum constitutive model in coal mass and the contact layers between the rock and coal mass is proposed. The original continuum constitutive model was initially developed for the cemented granular materials. The application of the modified continuum constitutive model is the key aspect to understand the momentum energy between the coal–rock interactions. The transformed energy between the coal mass and different strata layers will be analytically demonstrated as a function of the rock/joint quality interaction conditions. The failure and post failure in the coal mass and coal–rock joint interaction will be classified by the coal mass crushing, coal–rock interaction damage and fragment reorganisation. The outcomes of this paper will help to forecast the possibility of the coal burst occurrence based on the interaction between the coal mass and the strata layers in a coal mine.

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“…The dynamic effect in this work on jointed rock need to be considered. The shear behaviour of joints under dynamic conditions have been studied by many researchers (Bakhtar and Barton, 1984;Barla, et al, 1990;Hobbs, et al, 1990;Hutson and Dowding, 1990;Jing, et al, 1993;Qiu, et al, 1993;Kana, et al, 1996;Divoux, et al, 1997;Belem, et al, 2007;Ferrero, et al, 2010;Konietzky, et al, 2012).…”

Section: Shear Strength Of Flow Bands Under Dynamic Loadingmentioning

confidence: 99%

Determination of the Shear Strength Parameters of Flow Band Structures in Andesites under Static and Dynamic Conditions

Arslan¹,

Kahraman²

2018

deufmd

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Stability and deformation analyses of geotechnical projects such as tunnels, underground excavations and rock slopes require reliable data about the behavior of discontinuities (joints, fractures, bedding planes and etc.). Therefore, shear box tests are widely used in rock mechanics applications. In this study, several static and dynamic shear box tests were carried out both over flow bands of the andesites which cover a large area in the northern part of Izmir Bay. Shear box tests were conducted under both static and dynamic conditions on rectangular planes with a dimension of 400 x 200 mm. As a result of these tests, normal displacement-normal stress, shearing displacement-shearing stress and normal displacement-shear strength correlations were obtained. Also, peak and residual shear strength values, base friction angle and residual friction angle were found and the results were interpreted. Thus, the shear strength properties of the flow band structures can be given with more accuracy. Based on the new findings, more realistic solutions will be obtained in numerical analyses and simulation models aiming at determining the stability of underground excavations and engineering projects on the ground surface will be more reliable.

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Development of a New Experimental Apparatus for the Study of the Mechanical Behaviour of a Rock Discontinuity Under Monotonic and Cyclic Loads

Cited by 34 publications

References 18 publications

Controls on Post‐Seismic Landslide Behavior in Brittle Rocks

Controls on Post‐Seismic Landslide Behavior in Brittle Rocks

A Novel Damage Model for Strata Layers and Coal Mass

Determination of the Shear Strength Parameters of Flow Band Structures in Andesites under Static and Dynamic Conditions

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