Simulation Application and Analysis of CFD in the Division of Three Zones in Goaf
In coal mine fire prevention and extinguishing work,goaf has always been the focus of prevention.After the mining of the working face is completed,the"three zones"feature will clearly appear above the goaf.Wangling Coal Mine established numerical simulation analysis based on the actual situation of the goaf in the fully mechanized mining face,and reasonably divided the scope of the"three zones"of the goaf and obtained their distribution patterns.Based on this,the critical points of the"three zones"for coal spontaneous combustion on the inlet and return air sides of the goaf are determined,and the time nodes for reducing the propulsion speed are identified.Targeted prevention and control measures are proposed to prevent coal spontaneous combustion hazards in the goaf.
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