Next Article in Journal
Distributing Load Flow Computations Across System Operators Boundaries Using the Newton–Krylov–Schwarz Algorithm Implemented in PETSc
Next Article in Special Issue
Effects of Coal Deformation on Different-Phase CO2 Permeability in Sub-Bituminous Coal: An Experimental Investigation
Previous Article in Journal
Study on Insulation Breakdown Characteristics of Printed Circuit Board under Continuous Square Impulse Voltage
Previous Article in Special Issue
Effect of Intermediate Principal Stress on the Strength, Deformation, and Permeability of Sandstone
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle

Mechanism Analysis of Liquid Carbon Dioxide Phase Transition for Fracturing Rock Masses

School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Author to whom correspondence should be addressed.
Energies 2018, 11(11), 2909;
Received: 3 September 2018 / Revised: 20 October 2018 / Accepted: 23 October 2018 / Published: 25 October 2018
PDF [4532 KB, uploaded 25 October 2018]


The technique of breaking rocks using carbon dioxide phase transition technology is being widely applied in current research. This article combines theoretical and practical methods to analyze the mechanism by which high-pressure gas breaks rock at different stages. Using the observation that liquid carbon dioxide forms a high-pressure jet from release holes at the moment of release, a formula for calculating the initial pressure on the wall in the direction of release was obtained, and the pattern of initial crack formation on the borehole wall under different initial stress conditions was examined. An experiment using carbon dioxide phase transition technology to fracture rock without an initial stress field was conducted. The mechanism of generation and expansion of subsequent cracks under stress waves and high-pressure gas was analyzed, and the formula for calculating crack propagation radius under stress waves was obtained. The results suggested that under the quasi-static action of high-pressure gas, cracks begin to develop when the stress intensity factor KI at the crack tip is equal to or greater than the fracture toughness KIC of the rock. View Full-Text
Keywords: liquid carbon dioxide; initial pressure; high-pressure gas; crack growth liquid carbon dioxide; initial pressure; high-pressure gas; crack growth

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Gao, F.; Tang, L.; Zhou, K.; Zhang, Y.; Ke, B. Mechanism Analysis of Liquid Carbon Dioxide Phase Transition for Fracturing Rock Masses. Energies 2018, 11, 2909.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top