In order to effectively purify the diesel particulate matter (DPM) emitted by the trackless rubber wheel car in coal mining under the premise of dust control. This paper comprehensively investigated the laws of dust and DPM diffusion under forced ventilation and mixed ventilation and under different air intake volumes of the dust removal fan Q and different distances between the extractive air duct outlet and the head L by means of CFD numerical simulation. The following conclusions were drawn. Under mixed ventilation (Q = 450 m³/min) dominated by forced ventilation, when L= 5 m, the overall control effects on low-concentration dust, high-concentration dust and DPM are the best, with the diffusion distances being 46 m, 62 m and 54 m. Under mixed ventilation (Q=750 m³/min) dominated by exhaust ventilation, when L= 5 m, the overall control effects on low-concentration dust, high-concentration dust and DPM are the best, with the diffusion distances being 23 m, 24 m and 39 m, respectively. Therefore, under the above two air volumes, when L= 5 m, the best control effects can be achieved on dust and DPM in the working face.

为了在粉尘控制的前提下，有效净化煤矿开采中无轨胶轮车排放的柴油颗粒物（DPM）。本文通过CFD数值模拟，综合研究了强制通风和混合通风以及不同除尘风机进风量Q、不同排风风道出口与机头L距离下的粉尘和DPM扩散规律。得出以下结论。在强制通风为主的混合通风（Q  = 450 m ³ /min）下，当L= 5 m，对低浓度粉尘、高浓度粉尘和DPM的综合控制效果最好，扩散距离分别为46 m、62 m和54 m。在以排风通风为主的混合通风（Q =750 m ³ /min）下，当L = 5 m时，对低浓度粉尘、高浓度粉尘和DPM的综合控制效果最好，扩散距离为23 m ，分别为 24 m 和 39 m。因此，在上述两种风量下，当L =5 m时，对工作面粉尘和DPM的控制效果最好。