Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions

In order to obtain the mechanical behavior and permeability characteristics of coal under the coupling action of stress and seepage, permeability tests under different confining pressures in the process of deformation and destruction of briquette coal were carried out using the electrohydraulic serv...

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Autores principales:	Ma Haifeng, Yao Fanfan, Niu Xin’gang, Guo Jia, Li Yingming, Yin Zhiqiang, Li Chuanming
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/3b91ce9e16d14b3c951fea69e0a1d896
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spelling	oai:doaj.org-article:3b91ce9e16d14b3c951fea69e0a1d8962021-11-29T00:55:31ZExperimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions1468-812310.1155/2021/6381549https://doaj.org/article/3b91ce9e16d14b3c951fea69e0a1d8962021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6381549https://doaj.org/toc/1468-8123In order to obtain the mechanical behavior and permeability characteristics of coal under the coupling action of stress and seepage, permeability tests under different confining pressures in the process of deformation and destruction of briquette coal were carried out using the electrohydraulic servo system of rock mechanics. The stress-strain and permeability evolution curves of briquette coal during the whole deformation process were obtained. The mechanical behavior and permeability coefficient evolution response characteristics of briquette coal under stress-seepage coupling are well reflected. Research shows that stress-axial strain curve and the stress-circumferential strain curve have the same change trend, the hoop strain and axial strain effect on the permeability variation law of basic consistent, and the permeability coefficient with the increase of confining pressure and decreases, and the higher the confining pressure, the lower the permeability coefficient, the confining pressure increases rate under the same conditions, and the permeability coefficient corresponding to high confining pressure is far less than that corresponding to low confining pressure. The confining pressure influences the permeability of the briquette by affecting its dilatancy behavior. With the increase of the confining pressure, the permeability of the sample decreases, and the permeability coefficient decreases with the increase of the confining pressure at the initial stage, showing a logarithmic function. After failure, briquette samples show a power function change rule, and the greater the confining pressure is, the more obvious the permeability coefficient decreases.Ma HaifengYao FanfanNiu Xin’gangGuo JiaLi YingmingYin ZhiqiangLi ChuanmingHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Ma Haifeng Yao Fanfan Niu Xin’gang Guo Jia Li Yingming Yin Zhiqiang Li Chuanming Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
description	In order to obtain the mechanical behavior and permeability characteristics of coal under the coupling action of stress and seepage, permeability tests under different confining pressures in the process of deformation and destruction of briquette coal were carried out using the electrohydraulic servo system of rock mechanics. The stress-strain and permeability evolution curves of briquette coal during the whole deformation process were obtained. The mechanical behavior and permeability coefficient evolution response characteristics of briquette coal under stress-seepage coupling are well reflected. Research shows that stress-axial strain curve and the stress-circumferential strain curve have the same change trend, the hoop strain and axial strain effect on the permeability variation law of basic consistent, and the permeability coefficient with the increase of confining pressure and decreases, and the higher the confining pressure, the lower the permeability coefficient, the confining pressure increases rate under the same conditions, and the permeability coefficient corresponding to high confining pressure is far less than that corresponding to low confining pressure. The confining pressure influences the permeability of the briquette by affecting its dilatancy behavior. With the increase of the confining pressure, the permeability of the sample decreases, and the permeability coefficient decreases with the increase of the confining pressure at the initial stage, showing a logarithmic function. After failure, briquette samples show a power function change rule, and the greater the confining pressure is, the more obvious the permeability coefficient decreases.
format	article
author	Ma Haifeng Yao Fanfan Niu Xin’gang Guo Jia Li Yingming Yin Zhiqiang Li Chuanming
author_facet	Ma Haifeng Yao Fanfan Niu Xin’gang Guo Jia Li Yingming Yin Zhiqiang Li Chuanming
author_sort	Ma Haifeng
title	Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
title_short	Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
title_full	Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
title_fullStr	Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
title_full_unstemmed	Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions
title_sort	experimental study on seepage characteristics of fractured rock mass under different stress conditions
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/3b91ce9e16d14b3c951fea69e0a1d896
work_keys_str_mv	AT mahaifeng experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT yaofanfan experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT niuxingang experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT guojia experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT liyingming experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT yinzhiqiang experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions AT lichuanming experimentalstudyonseepagecharacteristicsoffracturedrockmassunderdifferentstressconditions
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Experimental Study on Seepage Characteristics of Fractured Rock Mass under Different Stress Conditions

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