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为提升采场气体涌出和遗煤自燃问题的数值模拟可靠性,实现动态仿真计算,使用COMSOL Multiphysics软件,建立变形几何(DG)物理场、流场、温度场、浓度场等多场耦合的动态模拟模型。研究工作面推进对采场气体涌出及遗煤自燃的影响。对比数值模拟与现场测试结果,验证模型的有效性。结果表明:在工作面的日均瓦斯体积分数、CO体积分数、每日最大瓦斯及CO体积分数、采空区氧气体积分数与自燃“三带”分布6个方面,模拟结果的相对误差限为-15%~15%,平均相对误差为-1.16%~2.67%,数值模拟结果与实测结果的动态变化趋势一致。
In order to improve the numerical simulation reliability of gas emission and spontaneous combustion of stope, dynamic simulation calculation is carried out. COMSOL Multiphysics software is used to establish multi-field coupling of deformation geometry (DG) physics field, flow field, temperature field and concentration field Dynamic simulation model. Research work to promote the impact of gas gushing and spontaneous combustion of coal left. Compare the numerical simulation with the field test results to verify the validity of the model. The results show that the relative error of simulation results in the aspects of daily gas volume fraction, CO volume fraction, daily maximal gas and CO volume fraction, oxygen volume fraction and spontaneous combustion in the working face The limit is -15% -15%, and the average relative error is -1.16% -2.67%. The results of numerical simulation are consistent with those of the measured data.