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《中国矿业大学学报(英文版)》 2008-04
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CFD simulation of spontaneous coal combustion in irregular patterns of goaf with multiple points of leaking air

LI Zong-xiang College of Vocational, Liaoning Technical University, Fuxin, liaoning 123000, China  
Based on the non-linear air leakage seepage equation for an anisotropic porous medium, on the seepage diffusion equation of multicomponent gas and on the seepage synthetic heat transfer equation of a porous medium, the numerical model for field flow problems of irregular patterns of a goaf with multiple points of leaking air is established and simultaneously solved by the upwind mode finite element method (G3 computer program). According to the complexity of irregular patterns of a goaf with multiple points of leaking air, the flow pattern in a large area of such a goaf and the variation in gases of methane, oxygen and CO and in temperature are theoretically described. In the calculation, the goaf is regarded as a caving anisotropic medium and the coupling effect of methane effusion on spontaneous combustion is considered. The simulation results agree well with practical experience. In addition, the spontaneous combustion process is also simulated, indicating that 1) the spontaneous combustion often takes place near the area where fresh air leaks in and 2) the fire sources can be classified into static and dynamic zones. Therefore, in practical fire preventing and extinguishing, we should clearly distinguish the upstream air leaking points from the downstream ones in order to take proper measures for leakage stopping.
【Fund】: supported by the National Natural Science Foundation of China (No.50574038);; the Scientific Research Foundation of Liaoning Technical University (No.2004-241).
【CateGory Index】: TD752.2
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【Citations】
Chinese Journal Full-text Database 6 Hits
1 LI Zong-xiang, XIA Chun-lin, JI Chuan-ren ( Vocational College, Liaoning Technical University, Fuxin 123000, China );Information processing of arbitrary boundaries in goaf and automatic generation of finite element mesh[J];Journal of Liaoning Technical University;2004-03
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3 LI Zongxiang MENG Xianchen ZHAO Guochen (Vocational College, Liaoning Technical University, Fuxin 123000, China);NUMERICAL SIMULATION OF FLOW PATTERN OF CAVING FLOW FIELD IN THE INHOMOGENEOUS GOAF WITH ARBITRARY SHAPE[J];Mechanics and Engineering;2005-06
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6 LI Zong-xiang Assoc. Prof. (College of Vocational, Liaoning Technical University);Numerical Simulation of Spontaneous Combustion Process of Residual Coal in Goaf[J];China Safety Science Journal;2005-06
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 LI Zong-xiang~1, WU Zhi-jun~2, WANG Zhen-xiang~2( 1 College of Vocational, Liaoning Technical University, Fuxin 123000, Liaoning, China; 2 Wulong Mine, Fuxin 123000, Liaoning, China);Numeral simulation model and application of temperature rise process caused by natural burn of lossed coal in goaf[J];Journal of Safety and Environment;2004-06
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【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
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