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《Mineral Engineering Research》 2009-04
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Numerical simulation of gas migration in goaf in extracting stage

QIN Yueping,SONG Yimeng,LUO Wei,DING Yuanwei(Faculty of Resource & Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)  
In order to ravel the distribution of gas and guide the work about gas drainage in goaf,and through the analysis of gas emission law and gas sources in goaf,a mathematical model of gas concentration field in goaf in a two-dimensional mobile reference frame was established,on which a non-dimensional analysis was made,and a program in finite difference method was developed,through which a numerical simulation of gas concentration field in goaf which was in a mobile state in Yangcaogou mine was performed.Calculation results showed that the distribution of gas concentration in goaf which extended at the speed of 5 m/d.were correspondent with theoretical analysis.It has practical significance and value for gas controlling work.
【Fund】: 国家自然科学基金资助项目(50674091);; 973基金项目资助项目(200CB221502)
【CateGory Index】: TD712
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