Modelling 3D crack propagation in hard rock pillars using a synthetic rock mass approach

Zhang, Y.; Stead, Doug

doi:10.1016/j.ijrmms.2014.09.014

Cited by 21 publications

(9 citation statements)

References 44 publications

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“…D 32 on the other hand is used to provide a measure of the volumetric density of fracturing within the damaged zone. 12 A series of simulations were conducted to investigate the influence of increasing groundwater level on the failure mechanism.…”

Section: Discussionmentioning

confidence: 99%

“…SJM is a method of inserting joints into the particle assembly in order to overcome the particle bumpiness for smooth sliding between two particles. 11,12 The code uses an explicit solution scheme suitable for simulation of highly nonlinear behaviour such as fracture, slip and opening/closing of joints. 10 For example, Lorig et al 13 used Slope Model to simulate failure of intact rock bridges in high rock slopes.…”

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confidence: 99%

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The possible role of brittle rock fracture in the 1963 Vajont Slide, Italy

Havaej

Wolter

Stead

2015

International Journal of Rock Mechanics and Mining Sciences

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

The possible role of brittle rock fracture in the 1963 Vajont Slide, Italy

Havaej

Wolter

Stead

2015

International Journal of Rock Mechanics and Mining Sciences

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“…This is largely attributed to its ability of explicitly simulating rock crack propagation . Recently, a Synthetic Rock Mass (SRM) method is developed to quantify mechanical properties of jointed rock mass . The SRM is an integrated model incorporating a discrete fracture network (DFN) within a Particle Flow Code 3D (PFC3D) particle assembly.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of confinement effect on jointed rock pillars using a Synthetic Rock Mass approach

Zhang

Zhao

2016

Num Anal Meth Geomechanics

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Confinement effect on jointed rock pillars is numerically characterised in this research using a Synthetic Rock Mass (SRM) approach. The SRM is an integrated model incorporating a discrete fracture network within a Particle Flow Code 3D particle assembly. In this paper, the confinement effect on a 3D jointed pillar SRM model is investigated in a series of simulations, including biaxial compression tests and true and conventional triaxial compression tests. The numerical results suggest that the applied confining stresses generally result in higher pillar strengths and ductile post-peak responses. More brittle post-peak behaviour is simulated in the biaxial and true triaxial tests when the pillar is confined by a high stress in one lateral direction and by a zero/low stress in the other lateral direction. This phenomenon is attributed to significant lateral pillar dilation in the less confined direction. Detailed pillar failure modes are monitored in the uniaxial and triaxial tests. Axial splitting fractures and long shear zones cutting through the pillar are simulated when the pillar is able to dilate in the direction of least confinement. Localised shearing along joints and failed rock blocks is the dominant failure mode when the pillar dilation is resisted by the applied confining stresses. The pillar remains relatively intact with limited cracking in the pillar core in the highly confined triaxial tests.

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“…Advances in Civil Engineering et al [29], Pierce et al [30], Elmo and Stead [31], Wang et al [32], Zhang and Stead [33], and Vallejos et al [34], which have simulated the increasing specimen size of the jointed rockmass leading to an apparent decrease in the strength. eir results indicate that the SRM method is valid and suitable for studying the strength behavior of the rockmass.…”

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confidence: 99%

Numerical Analysis of the Anisotropy and Scale Effects on the Strength Characteristics of Defected Rockmass

Liu

Wang

2020

Advances in Civil Engineering

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Discontinuous defect in the rockmass is a key influential factor in controlling the strength behavior, and how to estimate the anisotropic strength and scale effect on the defected rockmass is the remaining challenging focus in engineering application. In the present study, intact tuff samples cored from the Xiabeishan tunnel engineering in situ are conducted by experiment tests (i.e., uniaxial compression test, triaxial compression test, and Brazilian tensile test) to obtain the corresponding mechanical parameters. Results from the numerical simulations using the particle flow code (PFC) by the flat-jointed model (FJM) are performed to match the macroparameters from experimental results. It is observed that numerical results have good agreement with the macroscopic mechanical parameters of intact samples including UCS, BTS, triaxial compression strength, and corresponding deformation parameters. Finally, a series of uniaxial and confining compression tests are conducted by using a synthetic rockmass (SRM) method which is coupled with the discrete element method (DEM) and discrete fracture network (DFN). Then, the anisotropy and scale effects on the strength characteristics of the defected rockmass are investigated. The results show that defects have a vital effect on the failure mode and strength behavior of the rockmass in the research region. The strength parameters are changed with the specimen size. The REV size of the considered defected rockmass is regarded as 5 × 10 m, and this size is also influenced by the confinement level. The anisotropy of macroscopic strength parameters is found in the considered defected rockmass, whose stress-strain curves and failure modes are also discussed.

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Modelling 3D crack propagation in hard rock pillars using a synthetic rock mass approach

Cited by 21 publications

References 44 publications

The possible role of brittle rock fracture in the 1963 Vajont Slide, Italy

The possible role of brittle rock fracture in the 1963 Vajont Slide, Italy

Characterisation of confinement effect on jointed rock pillars using a Synthetic Rock Mass approach

Numerical Analysis of the Anisotropy and Scale Effects on the Strength Characteristics of Defected Rockmass

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