Simulation Study of Coal Failure Law under High-Pressure Water Jetting

High-pressure water jetting impinging on coal plays a relatively important role in improving pressure relief and permeability of the coal body, which can elevate the gas drainage effect and eliminate the outburst danger. But the slot formed by high-pressure water jetting impinging on the coal is aff...

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Main Authors: Beifang Gu*, Yanli Deng, Yan Shi
Format: Article
Language:English
Published: Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek 2020-01-01
Series:Tehnički Vjesnik
Subjects:
Online Access:https://hrcak.srce.hr/file/361315
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spelling doaj-7d7fba24931c412e8dbd82c3327b13662020-12-20T16:16:26ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek Tehnički Vjesnik1330-36511848-63392020-01-0127618001806Simulation Study of Coal Failure Law under High-Pressure Water JettingBeifang Gu*0Yanli Deng1Yan Shi2School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, No. 136, East Jinshui Road, Jinshui District, Zhengzhou, Henan Province, 450046, P. R. ChinaSchool of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, No. 136, East Jinshui Road, Jinshui District, Zhengzhou, Henan Province, 450046, P. R. ChinaSchool of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, No. 136, East Jinshui Road, Jinshui District, Zhengzhou, Henan Province, 450046, P. R. ChinaHigh-pressure water jetting impinging on coal plays a relatively important role in improving pressure relief and permeability of the coal body, which can elevate the gas drainage effect and eliminate the outburst danger. But the slot formed by high-pressure water jetting impinging on the coal is affected by various factors in pressure relief and permeation of the surrounding coal. To explore how to improve the effect of pressure relief and permeability of the coal body in the process of high-pressure water jetting, the stress-strain and failure of the surrounding coal after the formation of slots were analyzed based on Fast Lagrangian Analysis of Continua 3D(FLAC3D) software, the influence and law exerted from each of the factors was screened out on pressure relief of the slot, and the mathematical model of the slot failure range was constructed. Results show that stress of slots impinged by high-pressure water jetting changes considerably in different directions. As vertical stress increases, the range of pressure relief and failure of the coal body gradually increase, and the pressure relief range enlarges exponentially with the increase of depth. The synergy pressure relief between slots can strengthen the pressure relief of the coal body. The findings obtained from this study can provide construction guidance and reference value for the onsite application of related hydraulic measures.https://hrcak.srce.hr/file/361315Failure lawHigh-pressure water jettingNumerical simulationPressure relief effect
collection DOAJ
language English
format Article
sources DOAJ
author Beifang Gu*
Yanli Deng
Yan Shi
spellingShingle Beifang Gu*
Yanli Deng
Yan Shi
Simulation Study of Coal Failure Law under High-Pressure Water Jetting
Tehnički Vjesnik
Failure law
High-pressure water jetting
Numerical simulation
Pressure relief effect
author_facet Beifang Gu*
Yanli Deng
Yan Shi
author_sort Beifang Gu*
title Simulation Study of Coal Failure Law under High-Pressure Water Jetting
title_short Simulation Study of Coal Failure Law under High-Pressure Water Jetting
title_full Simulation Study of Coal Failure Law under High-Pressure Water Jetting
title_fullStr Simulation Study of Coal Failure Law under High-Pressure Water Jetting
title_full_unstemmed Simulation Study of Coal Failure Law under High-Pressure Water Jetting
title_sort simulation study of coal failure law under high-pressure water jetting
publisher Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
series Tehnički Vjesnik
issn 1330-3651
1848-6339
publishDate 2020-01-01
description High-pressure water jetting impinging on coal plays a relatively important role in improving pressure relief and permeability of the coal body, which can elevate the gas drainage effect and eliminate the outburst danger. But the slot formed by high-pressure water jetting impinging on the coal is affected by various factors in pressure relief and permeation of the surrounding coal. To explore how to improve the effect of pressure relief and permeability of the coal body in the process of high-pressure water jetting, the stress-strain and failure of the surrounding coal after the formation of slots were analyzed based on Fast Lagrangian Analysis of Continua 3D(FLAC3D) software, the influence and law exerted from each of the factors was screened out on pressure relief of the slot, and the mathematical model of the slot failure range was constructed. Results show that stress of slots impinged by high-pressure water jetting changes considerably in different directions. As vertical stress increases, the range of pressure relief and failure of the coal body gradually increase, and the pressure relief range enlarges exponentially with the increase of depth. The synergy pressure relief between slots can strengthen the pressure relief of the coal body. The findings obtained from this study can provide construction guidance and reference value for the onsite application of related hydraulic measures.
topic Failure law
High-pressure water jetting
Numerical simulation
Pressure relief effect
url https://hrcak.srce.hr/file/361315
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AT yanlideng simulationstudyofcoalfailurelawunderhighpressurewaterjetting
AT yanshi simulationstudyofcoalfailurelawunderhighpressurewaterjetting
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