煤层倾角对采场风流压力、漏风和瓦斯分布的影响

o obtain the impact of dip angle of coal seam change on the air flow pressure, air leakage and gas distribution in goaf under U+L type ventilation, this paper build the geometric model for different dip angle of coal seam and set the seam boundary conditions,then utilize CFD software to simulate numerically the air flow pressure,air leakage and gas distribution in goaf. The result shows that with the dip angle of coal seam increase, the air pressure in seam location in goaf decrease and the pressure gradient in goaf increases; the air leakage distribution along the working face keep steady and the increment of air leakage in goaf is very small; the gas concentration isolines move towards the upper right goaf , the gas concentration in seam location and the content of gas in goaf decreases，mesures must be taken to keep the air volume for the working face steady.