2019
DOI: 10.1002/ese3.432
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Analysis of fractures of a hard rock specimen via unloading of central hole with different sectional shapes

Abstract: Hard rock failure and rockburst hazards under high in situ stresses have been the subject of deep rock mechanics and engineering. Previous investigations employed cubic rock specimens with a central hole for simulation of rock fracturing around deep tunnels at a laboratory scale, while the failure characteristics and crack evolution behavior around different shapes of holes induced by excavation unloading response have been barely considered. A commercially combined finite‐discrete element method (combined FEM… Show more

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Cited by 67 publications
(36 citation statements)
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“…Because of the structural planes in the rock mass and the scale effect of the indoor test specimen, the mechanical properties obtained by indoor test are notably different from engineering rock mass . Besides, as mentioned above, only a part of the mechanical parameters significantly affect the deformation and damage of the surrounding rocks.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Because of the structural planes in the rock mass and the scale effect of the indoor test specimen, the mechanical properties obtained by indoor test are notably different from engineering rock mass . Besides, as mentioned above, only a part of the mechanical parameters significantly affect the deformation and damage of the surrounding rocks.…”
Section: Discussionmentioning
confidence: 99%
“…Because of the structural planes in the rock mass and the scale effect of the indoor test specimen, the mechanical properties obtained by indoor test are notably different from engineering rock mass. [46][47][48] Besides, as mentioned above, only a part of the mechanical parameters significantly affect the deformation and damage of the surrounding rocks. Based on the convergence value of k12, k13, and k23 of the roadway in Figure 10, inversion is performed for the mechanical parameters of the rocks significantly and moderately sensitive to the deformation using intelligent back-analysis 49 and FLAC3D software.…”
Section: Parameter Determinationmentioning
confidence: 99%
“…To describe the failure mechanism according to the stress inverse method from elastic mechanics, three sets of equations (equilibrium equations, compatibility equation, and continuity equations) are combined to obtain the internal stress solution, enabling analysis of the stress deviator effect and energy density. On this basis, the solution of the plastic zone boundary was deduced by applying the Mohr-Coulomb criteria, [55][56][57][58] as described in the following discussion.…”
Section: Mechanical Modelmentioning
confidence: 99%
“…The mining disturbance of the working face causes abutment stress in the surrounding rocks of the stope and roadway and induces deformation and destruction of the surrounding rocks, even inducing dynamic disasters such as coal burst and rock burst . This has an impact on underground equipment and production systems and poses a threat to the safety of underground personnel .…”
Section: Introductionmentioning
confidence: 99%
“…The mining disturbance of the working face causes abutment stress in the surrounding rocks of the stope and roadway [1][2][3][4][5][6][7] and induces deformation and destruction of the surrounding rocks, even inducing dynamic disasters such as coal burst and rock burst. [8][9][10] This has an impact on underground equipment and production systems and poses a threat to the safety of underground personnel. [11][12][13][14] Hence, it is necessary to elucidate the law of mining disturbance's influence on the abutment stress of the stope and roadway, which can provide some guidance for the safety of underground activities.…”
Section: Introductionmentioning
confidence: 99%