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《Journal of China Coal Society》 2005-05
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Numerical simulation of preventing spontaneous combustion by nitrogen injection in goaf of Y-type ventilation face

LI Zong-xiang~1,LI Hai-yang~1,JIA Jin-zhang~2(1.College of Vocational,Liaoning Technical University,Fuxin 123000,China;2.College of Resource and Environment Engineering,Liaoning Technical University,Fuxin 123000,China)  
Based on heterogeneous and porous medium seepage of air leakage-diffusion equation,as well as,gas and porous medium synthesis heat transferring equation,a spontaneous combustion non-steady numerical model of nitrogen injection goaf was established;the process of nitrogen injection in goaf of Y-type ventilation face was numerically simulated,by upwind finite element method through the computer programs(G3).The air flow state of nitrogen injection in goaf of Y-type ventilation face was described,the distribution state and its changing process of the concentration of the gas,oxygen,CO and temperature were done,too.The field solution was given in visual display.The special law under the condition of nitrogen injection in Y-type ventilation goaf was analyzed.The reasonable relation of nitrogen injection and the speed of working face boosting were given.The effect to prevent the spontaneous combustion in Y-type ventilation goaf is obvious at the air in side.
【CateGory Index】: TD752;
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