依据煤层开采后冒落带分布特征,结合覆岩采动裂隙“O”型圈理论,将采空区进行分区,建立物理模型,根据采空区多孔介质特性,分析不同区域的平均碎胀系数、渗透率、孔隙率,在fluent中分区设置参数,模拟分析采空区流场和瓦斯分布特性.“,”Based on coal seam mining caving distribution characteristics, combined with the overburden rock mining fissure O type circle theory, the mined-out area partition, the physical model was established. Based on the characteristics of goaf porous media in different areas, the average hulking coefficient, permeability, porosity, and the partition set parameters in the fluent software were analyzed, simulation analysis of goaf flow field and gas distribution characteristics were made.