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Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect

Author

Listed:
  • Shengtao Zhou

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Nan Jiang

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Xu He

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

  • Xuedong Luo

    (Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)

Abstract

Carbon dioxide phase transition fracturing has been widely used in rock mass excavation under complex environments, and its special rock breaking process shows obvious gathering energy effect. In this paper, the gathering energy effect of this technology is considered and then the impact reduction coefficient is defined and determined. Eventually, a combined method of field tests and numerical simulations is used to study the crack propagation characteristics and spatiotemporal changes of dynamic response. The results show that the cracks grow more and more slowly as time goes by; the peak displacement and peak point velocity in the primary impact direction are both greater than those in the secondary impact direction. The peak point velocity in different directions decreases as the distance from borehole increases and it decays more and more slowly. With the increase of distance from the borehole, the peak effective stress in the primary impact direction constantly decreases. However, it increases first and then decreases in the secondary impact direction. The results mentioned above can provide effective guidance for later experimental research and engineering.

Suggested Citation

  • Shengtao Zhou & Nan Jiang & Xu He & Xuedong Luo, 2020. "Rock Breaking and Dynamic Response Characteristics of Carbon Dioxide Phase Transition Fracturing Considering the Gathering Energy Effect," Energies, MDPI, vol. 13(6), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1336-:d:332115
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    References listed on IDEAS

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    1. Feng Gao & Leihu Tang & Keping Zhou & Yanan Zhang & Bo Ke, 2018. "Mechanism Analysis of Liquid Carbon Dioxide Phase Transition for Fracturing Rock Masses," Energies, MDPI, vol. 11(11), pages 1-12, October.
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    Cited by:

    1. Chao Pu & Zhenjian Liu & Ge Pu, 2022. "On the Factors of Impact Pressure in Supercritical CO 2 Phase-Transition Blasting—A Numerical Study," Energies, MDPI, vol. 15(22), pages 1-15, November.
    2. Jieqin Xia & Bin Dou & Hong Tian & Jun Zheng & Guodong Cui & Muhammad Kashif, 2021. "Research on Initiation of Carbon Dioxide Fracturing Pipe Using the Liquid Carbon Dioxide Phase-Transition Blasting Technology," Energies, MDPI, vol. 14(3), pages 1-16, January.

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