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• W2918011639 endingPage "1356" @default.
• W2918011639 startingPage "1341" @default.
• W2918011639 abstract "Abstract The pre‐existence of openings, which play an important role in the mechanical properties and cracking behaviours of rock, is prevalent in rock mass. The interaction among pre‐existing openings (or holes) complicates the instability problems when rock contains multiple holes. Studying the strength failure behaviour of rock that contains multiple pre‐existing holes contributes to the fundamental knowledge of the excavation and stability of underground rock engineering. In this study, first, a series of uniaxial compression tests were performed on granite specimens that contain multiple small holes to investigate the effect of the geometry of pre‐existing holes on the strength and fracture behaviours of rock. The crack initiation, propagation and coalescence process, and acoustic emission (AE) characteristics were investigated using photographic and AE monitoring. Three failure modes were identified, ie, splitting failure, stepped path failure, and planar failure modes. Second, a set of micromechanical parameters in the PFC3D model were calibrated by comparison with the experimental results of an intact granite specimen. The numerically simulated peak strength, peak strain, and failure mode of preholed specimens were consistent with the experimental results. In accordance with the numerical results, the failure modes of the preholed specimens were dependent on the bridge angle and number of holes. Last, the internal fracture characteristics of numerical specimens were revealed by analyzing the horizontal and vertical cross sections at different positions." @default.
• W2918011639 created "2019-03-02" @default.
• W2918011639 creator A5018135944 @default.
• W2918011639 creator A5021431468 @default.
• W2918011639 creator A5083549438 @default.
• W2918011639 date "2019-02-27" @default.
• W2918011639 modified "2023-10-17" @default.
• W2918011639 title "Cracking process of a granite specimen that contains multiple pre‐existing holes under uniaxial compression" @default.
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• W2918011639 doi "https://doi.org/10.1111/ffe.12990" @default.
• W2918011639 hasPublicationYear "2019" @default.
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