Influence of Radial Outlet Angle of Fresh Air on Dust Control at Fully Mechanized Excavating Face

In order to enhance the effect of dust control at fully mechanized excavating face, radial outlet angle of fresh air for wall-attached wind tube is studied. Fluent is used to simulate the influence of different angle on dust control effect; wall-attached wind tubes under different radial outlet angles are selected to apply for practice.The results show that different radial angle of the wind has a different inflence on dust control effect; when the radial angle of the wind tube is 0 °, secondary pollution is caused by transport belts; so the best dust control radial angle is 15 ° or 30 °.