Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.

Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.

To study the influence of different factors on the cracking effect of the liquid CO2 phase transition, the mechanics of coal rock crack extension based on liquid CO2 phase change blast loading were studied. Through the application of simulation software to analyze the influence of coal seam physical...

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Autores principales: Jinzhang Jia, Dongming Wang, Bin Li, Xiuyuan Tian
Formato: article
Lenguaje:EN
Publicado: Public Library of Science (PLoS) 2021
Materias:
Medicine
R
Science
Q
Acceso en línea:https://doaj.org/article/d5a25bc2182441b183118cda7affacc7
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spelling oai:doaj.org-article:d5a25bc2182441b183118cda7affacc72021-12-02T20:06:41ZStudy of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.1932-620310.1371/journal.pone.0254996https://doaj.org/article/d5a25bc2182441b183118cda7affacc72021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254996https://doaj.org/toc/1932-6203To study the influence of different factors on the cracking effect of the liquid CO2 phase transition, the mechanics of coal rock crack extension based on liquid CO2 phase change blast loading were studied. Through the application of simulation software to analyze the influence of coal seam physical parameters (in situ stress, gas pressure, modulus of elasticity and strength of coal) and blasting parameters (fracturing pore size and peak pressure of detonation)on the effect of liquid CO2 phase change cracking, the simulation results showed that the cracking effect of liquid CO2 phase change was positively correlated with the changes in gas pressure, elastic modulus, fracture hole diameter and peak vent pressure, negatively correlated with the variation in situ stress and compressive strength, and nearly independent of the tensile strength. In addition, by using Gray correlation analysis to analyze the influence degree of six main factors on the cracking effect, the calculation results showed that the effect of blasting parameters was greater than that of physical parameters. The main controlling factor that affected the blasting effect was the peak pressure of blasting release. By conducting comparative engineering trials with different blasting parameters, the test results showed that the crack effect of the coal seam was positively correlated with the change in fracture hole diameter and peak venting pressure, which was consistent with the results obtained from the simulation. The experimental results and simulation results for the effective radius of coal seam fracturing were basically consistent, with the error between the two types of results falling below 10%. Therefore, the reliability of the blasting numerical model was verified. In summary, the research results provide theoretical guidance for applying and promoting liquid CO2 fracturing technology in coal mines.Jinzhang JiaDongming WangBin LiXiuyuan TianPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254996 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Jinzhang Jia
Dongming Wang
Bin Li
Xiuyuan Tian
Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
description To study the influence of different factors on the cracking effect of the liquid CO2 phase transition, the mechanics of coal rock crack extension based on liquid CO2 phase change blast loading were studied. Through the application of simulation software to analyze the influence of coal seam physical parameters (in situ stress, gas pressure, modulus of elasticity and strength of coal) and blasting parameters (fracturing pore size and peak pressure of detonation)on the effect of liquid CO2 phase change cracking, the simulation results showed that the cracking effect of liquid CO2 phase change was positively correlated with the changes in gas pressure, elastic modulus, fracture hole diameter and peak vent pressure, negatively correlated with the variation in situ stress and compressive strength, and nearly independent of the tensile strength. In addition, by using Gray correlation analysis to analyze the influence degree of six main factors on the cracking effect, the calculation results showed that the effect of blasting parameters was greater than that of physical parameters. The main controlling factor that affected the blasting effect was the peak pressure of blasting release. By conducting comparative engineering trials with different blasting parameters, the test results showed that the crack effect of the coal seam was positively correlated with the change in fracture hole diameter and peak venting pressure, which was consistent with the results obtained from the simulation. The experimental results and simulation results for the effective radius of coal seam fracturing were basically consistent, with the error between the two types of results falling below 10%. Therefore, the reliability of the blasting numerical model was verified. In summary, the research results provide theoretical guidance for applying and promoting liquid CO2 fracturing technology in coal mines.
format article
author Jinzhang Jia
Dongming Wang
Bin Li
Xiuyuan Tian
author_facet Jinzhang Jia
Dongming Wang
Bin Li
Xiuyuan Tian
author_sort Jinzhang Jia
title Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
title_short Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
title_full Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
title_fullStr Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
title_full_unstemmed Study of the influencing factors of the liquid CO2 phase change fracturing effect in coal seams.
title_sort study of the influencing factors of the liquid co2 phase change fracturing effect in coal seams.
publisher Public Library of Science (PLoS)
publishDate 2021
url https://doaj.org/article/d5a25bc2182441b183118cda7affacc7
work_keys_str_mv AT jinzhangjia studyoftheinfluencingfactorsoftheliquidco2phasechangefracturingeffectincoalseams
AT dongmingwang studyoftheinfluencingfactorsoftheliquidco2phasechangefracturingeffectincoalseams
AT binli studyoftheinfluencingfactorsoftheliquidco2phasechangefracturingeffectincoalseams
AT xiuyuantian studyoftheinfluencingfactorsoftheliquidco2phasechangefracturingeffectincoalseams
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