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Positive Phase Pressure Function and Pressure Attenuation Characteristic of a Liquid Carbon Dioxide Blasting System

Author

Listed:
  • Bo Ke

    (School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
    The State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China)

  • Keping Zhou

    (School of Resource and Safety Engineering, Central South University, Changsha 410083, China)

  • Gaofeng Ren

    (School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China)

  • Ji Shi

    (School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China)

  • Yanan Zhang

    (School of Resource and Safety Engineering, Central South University, Changsha 410083, China)

Abstract

As environmental requirements become more stringent, the liquid carbon dioxide blasting system is one of the non-explosive blasting technologies that, with low tensile stress energy, will replace the chemical explosive blasting technology, and the impact pressure characteristic of high-pressure fluid is a crucial factor in the process of rock breaking. To further investigate the impact and pressure attenuation characteristics of high-pressure fluid during the phase transition of liquid carbon dioxide blasting system, the pressure curves of high-pressure fluid in liquid carbon dioxide blasting systems at different distances were measured in the laboratory. Based on the mechanism analysis of phase transition kinetics, the initial jet velocity of the four experiments was calculated, and the rationality of results was verified by the Bernoulli equation. The general expression of the positive phase pressure–time function was proposed, and the idealized impact pressure curve can be divided into five stages. The impact pressure field of the liquid carbon dioxide blasting system can be divided into three areas at different distances: the explosive jet impact zone, the jet edge zone and the shock wave action zone, and the pressure–contrast distance fitting equation of the liquid carbon dioxide blasting system were obtained.

Suggested Citation

  • Bo Ke & Keping Zhou & Gaofeng Ren & Ji Shi & Yanan Zhang, 2019. "Positive Phase Pressure Function and Pressure Attenuation Characteristic of a Liquid Carbon Dioxide Blasting System," Energies, MDPI, vol. 12(21), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4134-:d:281637
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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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