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Strength Reduction of Coal Pillar after CO2 Sequestration in Abandoned Coal Mines

文献类型：期刊论文

作者Du, Qiuhao1; Liu, Xiaoli1,2; Wang, Enzhi1,2; Wang, Sijing3
刊名MINERALS
出版日期2017-02-01
卷号7期号:2
关键词Co2 Sequestration Abandoned Coal Mine Adsorption Swelling Effect Strength Reduction
ISSN号2075-163X
DOI10.3390/min7020026
文献子类Article
英文摘要CO2 geosequestration is currently considered to be the most effective and economical method to dispose of artificial greenhouse gases. There are a large number of coal mines that will be scrapped, and some of them are located in deep formations in China. CO2 storage in abandoned coal mines will be a potential option for greenhouse gas disposal. However, CO2 trapping in deep coal pillars would induce swelling effects of coal matrix. Adsorption-induced swelling not only modifies the volume and permeability of coal mass, but also causes the basic physical and mechanical properties changing, such as elastic modulus and Poisson ratio. It eventually results in some reduction in pillar strength. Based on the fractional swelling as a function of time and different loading pressure steps, the relationship between volumetric stress and adsorption pressure increment is acquired. Eventually, this paper presents a theory model to analyze the pillar strength reduction after CO2 adsorption. The model provides a method to quantitatively describe the interrelation of volumetric strain, swelling stress, and mechanical strength reduction after gas adsorption under the condition of step-by-step pressure loading and the non-Langmuir isothermal model. The model might have a significantly important implication for predicting the swelling stress and mechanical behaviors of coal pillars during CO2 sequestration in abandoned coal mines.
WOS关键词SUPERCRITICAL CARBON-DIOXIDE ; MECHANICAL-PROPERTIES ; POROUS MATERIALS ; PERMEABILITY EVOLUTION ; MATRIX SHRINKAGE ; BITUMINOUS COAL ; GAS-ADSORPTION ; HIGH-PRESSURE ; SORPTION ; STRAINS
WOS研究方向Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000399054800011
出版者MDPI AG
资助机构National Basic Research Program of China(2011CB013500) ; National Key Research and Development Plan(2016YFC0501104) ; National Natural Science Foundation of China(U1361103 ; National Natural Science Foundation Outstanding Youth Foundation(51522903) ; Open Research Fund Program of the State Key Laboratory of Hydroscience and Engineering(2013-KY-06 ; 51479094 ; 2015-KY-04 ; 51379104) ; 2016-KY-02) ; National Basic Research Program of China(2011CB013500) ; National Key Research and Development Plan(2016YFC0501104) ; National Natural Science Foundation of China(U1361103 ; National Natural Science Foundation Outstanding Youth Foundation(51522903) ; Open Research Fund Program of the State Key Laboratory of Hydroscience and Engineering(2013-KY-06 ; 51479094 ; 2015-KY-04 ; 51379104) ; 2016-KY-02) ; National Basic Research Program of China(2011CB013500) ; National Key Research and Development Plan(2016YFC0501104) ; National Natural Science Foundation of China(U1361103 ; National Natural Science Foundation Outstanding Youth Foundation(51522903) ; Open Research Fund Program of the State Key Laboratory of Hydroscience and Engineering(2013-KY-06 ; 51479094 ; 2015-KY-04 ; 51379104) ; 2016-KY-02) ; National Basic Research Program of China(2011CB013500) ; National Key Research and Development Plan(2016YFC0501104) ; National Natural Science Foundation of China(U1361103 ; National Natural Science Foundation Outstanding Youth Foundation(51522903) ; Open Research Fund Program of the State Key Laboratory of Hydroscience and Engineering(2013-KY-06 ; 51479094 ; 2015-KY-04 ; 51379104) ; 2016-KY-02)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52972]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Liu, Xiaoli
作者单位1.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
2.Tsinghua Univ, Sanjiangyuan Collaborat Innovat Ctr, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Du, Qiuhao,Liu, Xiaoli,Wang, Enzhi,et al. Strength Reduction of Coal Pillar after CO2 Sequestration in Abandoned Coal Mines[J]. MINERALS,2017,7(2).
APA Du, Qiuhao,Liu, Xiaoli,Wang, Enzhi,&Wang, Sijing.(2017).Strength Reduction of Coal Pillar after CO2 Sequestration in Abandoned Coal Mines.MINERALS,7(2).
MLA Du, Qiuhao,et al."Strength Reduction of Coal Pillar after CO2 Sequestration in Abandoned Coal Mines".MINERALS 7.2(2017).

入库方式： OAI收割

来源：地质与地球物理研究所

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