Dust is one of the main pollutants in coal mines, which seriously affects the physical and mental health of workers, as well as the safe production in underground mines. Dual-radial swirl shielding ventilation is a new ventilation method for a fully mechanized excavation face and can effectively reduce the dust concentration in the underground. The dust control effect of dual-radial swirl shielding ventilation is mainly affected by the thickness and integrity of the shielding air curtain, as well as the disturbance of the flow field near the air curtain. By changing the blowing and suction air volume ratio of the air duct, the strength of the radial air curtain can be improved, and the dust control effect of the dual-radial swirl shielding ventilation system can be effectively improved. In order to determine the optimal operating parameters of the dual-radial swirl shielding ventilation system, a numerical simulation method was used to conduct an in-depth study on the blowing and suction air volume ratio of the system. The results showed that when the blowing and suction air volume ratio of the air duct was 1.5, the radial air curtain had the highest strength. Under this condition, the dust concentration at the driver’s position of the roadheader was the lowest, and the dual-radial swirl shielding ventilation system can achieve an ideal dust control effect.

中文翻译：

---

基于CFD的综采工作面双径向旋流屏蔽通风最佳吹吸风量比的确定

粉尘是煤矿的主要污染物之一，严重影响工人的身心健康和井下安全生产。双径向旋流屏蔽通风是一种新型综采工作面通风方式，可有效降低井下粉尘浓度。双径向旋流屏蔽通风的降尘效果主要受屏蔽风幕的厚度和完整性以及风幕附近流场扰动的影响。通过改变风道的吹吸风量比，可以提高径向风幕的强度，有效提高双径向旋流屏蔽通风系统的除尘效果。为确定双径向涡流屏蔽通风系统的最佳运行参数，采用数值模拟方法对该系统的吹吸风量比进行了深入研究。结果表明，当风道吹吸风量比为1.5时，径向风幕强度最高。在这种情况下，掘进机驾驶员位置的粉尘浓度最低，双径向旋流屏蔽通风系统可以达到理想的粉尘控制效果。径向气幕的强度最高。在这种情况下，掘进机驾驶员位置的粉尘浓度最低，双径向旋流屏蔽通风系统可以达到理想的粉尘控制效果。径向气幕的强度最高。在这种情况下，掘进机驾驶员位置的粉尘浓度最低，双径向旋流屏蔽通风系统可以达到理想的粉尘控制效果。