Research on Coal Spontaneous Combustion in Goaf of U-Shaped Ventilation Coal Caving Working Face
The combined disaster of gas and coal spontaneous combustion has become a common mode of major accidents in coal mines.To reveal the composite disaster characteristics of the U-shaped ventilation fully mechanized top coal caving working face in high level extraction roadway(HLDR),taking the 19303 working face in Dongqu mine as an example,COMSOL was used to simulate the ventilation mode and gas concentration field distribution of the U-shaped ventilation fully mechanized top coal caving working face in high level extraction roadway under different air supply conditions,and to quantitatively divide the composite disaster areas of gas and coal spontaneous combustion in the goaf.The results show that the on-site experimental data is consistent with the simulation results,verifying the effectiveness of the simulation.The simulation results provide important theoretical basis and practical guidance for the prevention and control of goaf disasters.
U-shaped ventilationcoal spontaneous combustion and gas explosioncomposite disaster similarity theorynumerical simulation
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NSTL
万方数据
