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

Bo Ke, Keping Zhou, Gaofeng Ren, Ji Shi and Yanan Zhang
Additional contact information
Bo Ke: School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, 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

Energies, 2019, vol. 12, issue 21, 1-16

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.

Keywords: positive phase pressure function; pressure attenuation characteristic; supercritical carbon dioxide phase transition; liquid carbon dioxide blasting system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/21/4134/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/21/4134/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:21:p:4134-:d:281637

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().