Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion
Abstract The high‐pressure gas expansion‐induced deformation and dynamic fracture of coal are important parts of coal and gas outburst. To better understand the law of this process, laboratory experiments and numerical simulation are used to study the law of damage. A cavity with different pressures...
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Online Access: | https://doi.org/10.1002/ese3.757 |
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doaj-77481d8f985b4995851a2599e5803c192020-11-25T03:29:33ZengWileyEnergy Science & Engineering2050-05052020-09-01893047305910.1002/ese3.757Experimental and numerical simulation study on the dynamic fracture of coal by gas expansionQifei Wang0Yuechao Zhao1Chengwu Li2Beijing Xie3Honglai Xue4College of Emergency Management and Safety Engineering China University of Mining and Technology (Beijing) Beijing ChinaCollege of Emergency Management and Safety Engineering China University of Mining and Technology (Beijing) Beijing ChinaCollege of Emergency Management and Safety Engineering China University of Mining and Technology (Beijing) Beijing ChinaCollege of Emergency Management and Safety Engineering China University of Mining and Technology (Beijing) Beijing ChinaSchool of Environmental and Safety Engineering Changzhou University Jiangshu ChinaAbstract The high‐pressure gas expansion‐induced deformation and dynamic fracture of coal are important parts of coal and gas outburst. To better understand the law of this process, laboratory experiments and numerical simulation are used to study the law of damage. A cavity with different pressures of CH4 or N2 was destroyed by a jack to achieve the rapid expansion of the gas and coal fracture inside. The particle size distribution of the coal particles before and after the experiment was measured, and the breakage ratio and the newly added surface area were calculated. The experimental results indicate that during the gas expansion process, the breakage ratio of coal and the newly added surface area clearly increase with the increase in gas pressure. Finally, a numerical model based on peridynamic theory was developed to simulate crack generation and the propagation of coal induced by the expansion of gases at different pressures. The numerical simulation results show that the higher the initial gas pressure is, the higher the number of failure units. Moreover, only when the gas pressure is large enough will the coal crack in various directions at the same time.https://doi.org/10.1002/ese3.757coalcrack propagationgas expansionperidynamic |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qifei Wang Yuechao Zhao Chengwu Li Beijing Xie Honglai Xue |
spellingShingle |
Qifei Wang Yuechao Zhao Chengwu Li Beijing Xie Honglai Xue Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion Energy Science & Engineering coal crack propagation gas expansion peridynamic |
author_facet |
Qifei Wang Yuechao Zhao Chengwu Li Beijing Xie Honglai Xue |
author_sort |
Qifei Wang |
title |
Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
title_short |
Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
title_full |
Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
title_fullStr |
Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
title_full_unstemmed |
Experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
title_sort |
experimental and numerical simulation study on the dynamic fracture of coal by gas expansion |
publisher |
Wiley |
series |
Energy Science & Engineering |
issn |
2050-0505 |
publishDate |
2020-09-01 |
description |
Abstract The high‐pressure gas expansion‐induced deformation and dynamic fracture of coal are important parts of coal and gas outburst. To better understand the law of this process, laboratory experiments and numerical simulation are used to study the law of damage. A cavity with different pressures of CH4 or N2 was destroyed by a jack to achieve the rapid expansion of the gas and coal fracture inside. The particle size distribution of the coal particles before and after the experiment was measured, and the breakage ratio and the newly added surface area were calculated. The experimental results indicate that during the gas expansion process, the breakage ratio of coal and the newly added surface area clearly increase with the increase in gas pressure. Finally, a numerical model based on peridynamic theory was developed to simulate crack generation and the propagation of coal induced by the expansion of gases at different pressures. The numerical simulation results show that the higher the initial gas pressure is, the higher the number of failure units. Moreover, only when the gas pressure is large enough will the coal crack in various directions at the same time. |
topic |
coal crack propagation gas expansion peridynamic |
url |
https://doi.org/10.1002/ese3.757 |
work_keys_str_mv |
AT qifeiwang experimentalandnumericalsimulationstudyonthedynamicfractureofcoalbygasexpansion AT yuechaozhao experimentalandnumericalsimulationstudyonthedynamicfractureofcoalbygasexpansion AT chengwuli experimentalandnumericalsimulationstudyonthedynamicfractureofcoalbygasexpansion AT beijingxie experimentalandnumericalsimulationstudyonthedynamicfractureofcoalbygasexpansion AT honglaixue experimentalandnumericalsimulationstudyonthedynamicfractureofcoalbygasexpansion |
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1724578482168528896 |