Study on the influence of press-in ventilation parameters on the flow field

In order to further ensure that the distance between the air duct outlet and the working face can meet the basic ventilation conditions to ensure effective ventilation when the driving face adopts the pressure-in ventilation mode, numerical simulation is carried out in this paper with the help of fluid dynamics fluent simulation software. The influences of wind speed at outlet, ratio of section width to height, diameter of air duct, location of air duct and distance between end face and air duct outlet on flow field and effective range are analyzed. The results show that the change of outlet velocity of air duct has no effect on the velocity change law of air flow center axis, but the numerical value of corresponding position changes. Under the condition that the section size of 3m×3m is set, the optimum air duct diameter is 800mm; when the air duct is located at the top Angle of the roadway and the roadway fault area increases, the effective range increases more. When the end face distance exceeds the effective range, eddy current stagnation zone will be generated.