2009•Mineral Engineering ResearchRequires access
Numerical simulation of gas migration in goaf in extracting stage
Yuanwei Ding
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Abstract
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.