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。
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 relative error 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.
作者
董子文
刘爱群
齐庆杰
于文惠
滕广平
DONG Ziwen LIU Aiqun QI Qingjie YU Wenhui TENG Guangping(School of Safety and Environment Engineering, Hunan Institute of Technology,Hengyang Hunan 421002,China School of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2017年第7期30-35,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51274115
51274113)
