Research on dynamic numerical simulation of gas emission and coal spontaneous combustion in stope

doi:10.16265/j.cnki.issn1003-3033.2017.07.006

Abstract

Abstract: In order to improve the reliability of numerical simulation of the gas emission and residual coal spontaneous combustion in stope and realize the dynamic simulation calculation, a dynamic multi-physics numerical simulation model was established, which coupling deformation geometry, flow field, temperature field and concentration field by using the software of COMSOL Multiphysics. Effects of advancement of the active face on both the gas emission and the coal spontaneous combustion were studied by means of simulation and measurement. Effectiveness of the dynamic model was verified by comparison between simulation result with result. The relativeerror limits of simulation results are -15%-15%, average relative error is -1.16%-2.67%, for the 6 aspects including average and maximum concentration of gas and CO, concentration of oxygen and spontaneous combustion three zones in goaf, and that the dynamic change trend of numerical simulation results is consistent with that of the field measurement results.

Key words: dynamic stope, deformed geometry(DG), COMSOL Multiphysics, multi-physics coupling, numerical simulation

CLC Number:

X932

DONG Ziwen, LIU Aiqun, QI Qingjie, YU Wenhui, TENG Guangping. Research on dynamic numerical simulation of gas emission and coal spontaneous combustion in stope[J]. China Safety Science Journal, 2017, 27(7): 30-35.

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