Numerical simulation study of spontaneous combustion in goaf based on non-Darcy seepage
In order to study the influence of non-Darcy seepage on spontaneous combustion in goaf, seepage tests were conducted in three groups of broken rocks which were different average particle sizes, and then the test data were processed by non-Darcy seepage equation. So that the equations of non-Darcy permeability coefficient K with porosity n and particle size d, non-Darcy flow factor ft with the n and the d were achieved. On the basis of these equations, the paper analyzed the influential factors of the spontaneous combustion in goaf, and then established the spontaneous combustion mathematical model on the coupling of air flow field, oxygen concentration field and temperature field on moving coordinates. According to the model, the calculating software was programmed by VB6.0 to obtain the oxygen concentration distribution map and the residual coal temperature distribution map in goaf. The results are of theoretical and practical significance to prevent spontaneous combustion in goaf.
non-Darcy seepage spontaneous combustion numerical simulation permeability coefficient non-Darcy seepage factor
QIN Yue-ping LIU Wei YANG Wu-wu SU Guo-hui
Faculty of Resources & Safety Engineering, China University of Mining and Technology (Beijing), Beij Shanxi Zhongxin Tangshangou Coal Industry Co., Ltd., Datong 037002, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
122-130
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）