Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures

This paper addresses the mechanical behavior and permeability characteristics of the unloading coal under different water pressures in the TOP2518-comprehensive- rock-testing system. With the use of the computed tomography scan tests, the 3-D crack distribution characteristics of the fractured coal...

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Main Authors:	Tan Qiang, Zhang Ru, Gao Mingzhong, Liu Qianying, Zhang Zetian, Jia Zheqiang
Format:	Article
Language:	English
Published:	VINCA Institute of Nuclear Sciences 2017-01-01
Series:	Thermal Science
Subjects:	water pressures unloading coal permeability characteristics crack distribution
Online Access:	http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361700195T.pdf

id	doaj-c6ea2a20f4114e4ebf731be9195037e3
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spelling	doaj-c6ea2a20f4114e4ebf731be9195037e32021-01-02T05:43:27ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632017-01-0121suppl. 124124910.2298/TSCI170310195T0354-98361700195TCoal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressuresTan Qiang0Zhang Ru1Gao Mingzhong2Liu Qianying3Zhang Zetian4Jia Zheqiang5Sichuan University, College of Architecture and Environment, Chengdu, China + Sichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, ChinaSichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, China + Sichuan University, College of Water Resource and Hydropower, Chengdu, ChinaSichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, China + Sichuan University, College of Water Resource and Hydropower, Chengdu, ChinaSichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, China + Sichuan University, College of Water Resource and Hydropower, Chengdu, ChinaSichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, China + Sichuan University, College of Water Resource and Hydropower, Chengdu, ChinaSichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu, China + Sichuan University, College of Water Resource and Hydropower, Chengdu, ChinaThis paper addresses the mechanical behavior and permeability characteristics of the unloading coal under different water pressures in the TOP2518-comprehensive- rock-testing system. With the use of the computed tomography scan tests, the 3-D crack distribution characteristics of the fractured coal are obtained and reconstructed. The difference in the 3-D crack distribution of unloading coal induced by different water pressures is also analyzed in detail. The results show that, as the water pressure changes from 0 MPa to 8 MPa, the peak stress of unloading coal gradually decreases, and that the variation degree of permeability of the coal samples increases significantly comparing with the initial permeability.http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361700195T.pdfwater pressuresunloading coalpermeability characteristicscrack distribution
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Tan Qiang Zhang Ru Gao Mingzhong Liu Qianying Zhang Zetian Jia Zheqiang
spellingShingle	Tan Qiang Zhang Ru Gao Mingzhong Liu Qianying Zhang Zetian Jia Zheqiang Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures Thermal Science water pressures unloading coal permeability characteristics crack distribution
author_facet	Tan Qiang Zhang Ru Gao Mingzhong Liu Qianying Zhang Zetian Jia Zheqiang
author_sort	Tan Qiang
title	Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
title_short	Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
title_full	Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
title_fullStr	Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
title_full_unstemmed	Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
title_sort	coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures
publisher	VINCA Institute of Nuclear Sciences
series	Thermal Science
issn	0354-9836 2334-7163
publishDate	2017-01-01
description	This paper addresses the mechanical behavior and permeability characteristics of the unloading coal under different water pressures in the TOP2518-comprehensive- rock-testing system. With the use of the computed tomography scan tests, the 3-D crack distribution characteristics of the fractured coal are obtained and reconstructed. The difference in the 3-D crack distribution of unloading coal induced by different water pressures is also analyzed in detail. The results show that, as the water pressure changes from 0 MPa to 8 MPa, the peak stress of unloading coal gradually decreases, and that the variation degree of permeability of the coal samples increases significantly comparing with the initial permeability.
topic	water pressures unloading coal permeability characteristics crack distribution
url	http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361700195T.pdf
work_keys_str_mv	AT tanqiang coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures AT zhangru coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures AT gaomingzhong coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures AT liuqianying coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures AT zhangzetian coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures AT jiazheqiang coalpermeabilityandcrackdistributioncharacteristicsinunloadingconfiningpressureexperimentsunderdifferentwaterpressures
_version_	1724358806157131776

Coal permeability and crack distribution characteristics in unloading confining pressure experiments under different water pressures

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