Particle flow simulation on compression failure and energy characteristics for marble containing pre-existing fissure

FENG Chenchen; WANG Zhiliang; WANG Haoran; WANG Haochen

doi:10.12170/20220112001

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Hydro-Science and Engineering > 2023 > > DOI: 10.12170/20220112001

（FENG Chenchen, WANG Zhiliang, WANG Haoran, et al. Particle flow simulation on compression failure and energy characteristics for marble containing pre-existing fissure[J]. Hydro-Science and Engineering, 2023（1）: 53-62. （in Chinese））. DOI: 10.12170/20220112001

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Particle flow simulation on compression failure and energy characteristics for marble containing pre-existing fissure

School of Civil Engineering, Hefei University of Technology, Hefei 230009, China

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Received Date: January 11, 2022
Available Online: August 04, 2022

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To study the mechanism of different fissure parameters on rock deformation and failure and law of energy evolution, the X-ray diffraction and uniaxial compression tests were conducted on Jinping marble. Firstly, three-dimensional GBM was generated based on the X-ray diffraction results and particle flow code. Then, the mesoscopic parameters was calibrated according to the results of uniaxial compression tests of intact marble sample, and the numerical model containing various fissure parameters was constructed. Finally, the process of the deformation and failure along with the energy evolution of numerical samples was simulated and analyzed. The results show that the strength of sample increases first and then decreases with the increasing fissure dip angle. The strength of sample is intensified with the increase of the axial offset and fissure length. With an increase in the radial offset of fissure, the strength of sample decreases first and then increases. In addition, the influence degree of dip and spatial position of fissure on the strength of sample is related to the fissure length. When the fracture length is large, the dip angle inhibits the deterioration of axial offset and even changes the influence mode of radial offset. The hardening effect of dip angle on the sample strength is more obvious as fissure length is larger. It is also found that the length, dip and spatial position of fissure significantly change the failure mode of sample.
- marble,
- defect level,
- strength failure,
- energy evolution,
- particle flow simulation

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Particle flow simulation on compression failure and energy characteristics for marble containing pre-existing fissure

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