Numerical Simulation Of Streamline Distribution In Goaf

Gas disaster in coal mine are the major technical issues constraints safety production, and goaf are the most important source of coal mine disasters, the largest gas source of working face. In order to effective governance goaf disasters, this article study on distribution of flow lines in goaf of fully mechanized sublevel caving face, using field observations, theoretical analysis and computer simulation and other ways to study the law on gas migration in goaf.Based on the long-term experimental observations about Chenjiashan mine 416 working face goaf, date of gas distribution in goaf have been obtain. Using gray theory, according to measured data, the article get the main factor of affecting the gas concentration distribution in goaf. Through laboratory experiments and numerical simulation, obtained goaf seepage parameters; basis of the percolation parameters, derived goaf mathematical model of gas migration and using FLUENT software for numerical simulation in order to display goaf gas flow distribution in graphical. Provides a reliable theoretical basis for gas governance and management.