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《Mining Safety & Environmental Protection》 2018-03
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Effect of Dry-wet Circulation on Permeability of Coal Containing Gas

WANG Qian;LU Mingyue;WANG Weizhong;Chongqing Vocational Institute of Engineering;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University;  
In order to study the effect of dry-wet circulation on permeability of coal containing gas,by using the self-developed coal containing gas thermal-hydrological-mechanical( THM) coupling experimental equipment,an experimental study about the permeability of raw coal was made under different dry-wet cycles and different average effective stresses. The research results showed that: under the condition of a constant temperature and dry-wet cycles,with the increase of average effective stress,the permeability of coal samples showed a logarithmic function decreas. The sensitivity coefficient of average effective stress to permeability increased with the increase of coal sample dry-wet cycles,decreased with the increase of average effective stress. Under the condition of a constant temperature and an average effective stress,the permeability of coal samples increased with the increase of coal sample dry-wet cycles,and the relationship between coal sample permeability and dry-wet cycle can be expressed by linear function. The more dry-wet cycles,the stronger the water absorption of the coal sample,the greater the saturation moisture content.
【Fund】: 国家自然科学基金项目(51434003)
【CateGory Index】: TD712
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