采场气体涌出与煤自燃的动态数值模拟研究

发布时间：2018-05-03 01:40

本文选题：动态采场 + 变形几何(DG)　；参考：《中国安全科学学报》2017年07期

【摘要】：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。
[Abstract]:In order to improve the reliability of numerical simulation of gas emission and spontaneous combustion of coal in stope and realize dynamic simulation calculation, the dynamic simulation model of multi-field coupling, such as the physical field, flow field, temperature field, concentration field and so on, is established by using COMSOL Multiphysics software. The effect of face propulsion on gas emission and coal spontaneous combustion in stope is studied. The validity of the model is verified by comparing the numerical simulation with the field test results. The results show that the daily gas volume fraction and CO volume fraction, the maximum daily gas and CO volume fraction, the oxygen volume fraction in the goaf and the distribution of the "three zones" of spontaneous combustion are six aspects. The relative error limit of the simulation results is -15 and the average relative error is -1.16 and 2.67. The dynamic trend of the numerical simulation results is consistent with that of the measured results.
【作者单位】：湖南工学院安全与环境工程学院;辽宁工程技术大学安全科学与工程学院;
【基金】：国家自然科学基金资助(51274115,51274113)
【分类号】：TD752.2

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