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Acoustic Emission Characteristics and Damage Evolution of Rock under Different Loading Modes

Author

Listed:
  • Ersheng Zha

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
    College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China)

  • Ru Zhang

    (College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
    MOE Key Laboratory of Deep Earth Science & Engineering, Sichuan University, Chengdu 610065, China)

  • Zetian Zhang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
    College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China)

  • Ting Ai

    (MOE Key Laboratory of Deep Earth Science & Engineering, Sichuan University, Chengdu 610065, China)

  • Li Ren

    (MOE Key Laboratory of Deep Earth Science & Engineering, Sichuan University, Chengdu 610065, China)

  • Zhaopeng Zhang

    (MOE Key Laboratory of Deep Earth Science & Engineering, Sichuan University, Chengdu 610065, China)

  • Yang Liu

    (MOE Key Laboratory of Deep Earth Science & Engineering, Sichuan University, Chengdu 610065, China)

  • Chendi Lou

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
    College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China)

Abstract

To study the evolution of acoustic emission (AE) parameters and the differences in the fracturing and failure process of rocks under different loading modes, AE signals of marble were detected during uniaxial compression tests (UCTs), direct tensile tests (DTTs) and indirect tensile tests (ITTs) in this paper. Then, the temporal and spatial evolution of the AE parameters and damage development of rock under different loading modes were analyzed. The results showed that the sequence of total AE events and AE counts under different loading modes was UCT > DTT > ITT. In the DTT and ITT, the energy release of AE signals was concentrated at the peak stress and weakened rapidly afterward, whereas in the UCT, there were still a large number of AE signals accompanied by violent AE energy release during the postpeak stage. The generation mechanism of AE sources in rock and the corresponding failure modes were different under different loading modes. In the UCT, the multiple cleavage fractures were mainly caused by compression-induced fracturing. In the DTT, the single fracture surface was generated by tensile stress, whereas in the ITT, compressive-tensile stress was applied to the fracture surface. In addition, the stress levels at which the b -value and the spatial fractal dimension D s of AE events decreased dramatically were consistent under the different loading modes, and the sequence was UCT < DTT < ITT. According to the changes in AE parameters during the whole process of rock deformation and failure, the first and second precursor points before failure were defined to distinguish the development of microfracture damage and failure processes in rocks under the different loading modes. The above results have certain significance for future studies on the monitoring of surrounding rock instability and failure prediction.

Suggested Citation

  • Ersheng Zha & Ru Zhang & Zetian Zhang & Ting Ai & Li Ren & Zhaopeng Zhang & Yang Liu & Chendi Lou, 2020. "Acoustic Emission Characteristics and Damage Evolution of Rock under Different Loading Modes," Energies, MDPI, vol. 13(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3649-:d:384879
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    References listed on IDEAS

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    1. Yi Xue & Faning Dang & Zhengzheng Cao & Feng Du & Jie Ren & Xu Chang & Feng Gao, 2018. "Deformation, Permeability and Acoustic Emission Characteristics of Coal Masses under Mining-Induced Stress Paths," Energies, MDPI, vol. 11(9), pages 1-18, August.
    2. Zilong Zhou & Haiquan Wang & Xin Cai & Lu Chen & Yude E & Ruishan Cheng, 2019. "Damage Evolution and Failure Behavior of Post-Mainshock Damaged Rocks under Aftershock Effects," Energies, MDPI, vol. 12(23), pages 1-17, November.
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    Cited by:

    1. Lu Wang & Jianfeng Liu & Yilin Liao & Shuyu Yang & An He & Huining Xu, 2023. "A Study on the Permeability and Damage Characteristics of Limestone under Stress–Seepage Coupling Conditions," Energies, MDPI, vol. 16(19), pages 1-15, September.

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