关键词: 综掘面, 尘源动态变化, 粉尘场, 风流调控, 正交试验, 极差分析

Abstract: Absrtact:In view of the problem that the airflow state of fully mechanized face can not change dynamically in real time and the dust source is moving continuously, which leads to serious dust accumulation in roadway. The orthogonal test scheme of dust field simulation under airflow control is designed. The influence of airflow control parameters on dust concentration distribution under dynamic change of dust source is analyzed by FLUENT software simulation , and the significance of the influence factors of the air outlet diameter, the horizontal deflection angle and the vertical deflection angle of the air duct is analyzed by the range analysis method. The air flow control scheme of the optimal distribution of the dust field is determined. The actual test of air flow control at 5m and 10m from the outlet of S1212 rubber transportation roadway in Ningtiaota mine shows that the average dust concentration of pedestrian breathing zone height on return side is reduced by 33.4% and 34.3%, and the dust concentration at driving driver is reduced by 45.3% and 40.4%, respectively. The results show that the air flow control scheme of outlet air outlet can be established according to the actual demand. Regulating the outlet airflow state can optimize the distribution of dust field, reduce dust concentration and improve ventilation environment.