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为探讨煤矿井下无轨胶轮车行驶过程中扬尘分布规律和影响因素,基于COMSOLMultiphysics5.0建立井下无轨胶轮车行驶过程中扬尘的三维模型。研究积尘负荷、风速、颗粒密度、颗粒直径、无轨胶轮车行驶速度等5因素5水平25种情况下,扬尘浓度的分布。分析以上5个因素在不同空间位置上对扬尘浓度的影响水平。结果表明:无轨胶轮车行驶时巷道内不同高度处扬尘浓度分布趋势不同;积尘负荷对全巷道扬尘浓度均有显著影响;无轨胶轮车尾后5 m至车头前23 m范围内风速对扬尘浓度无影响;行驶速度对无轨胶轮车头前3~28 m范围内中间高度和行车侧扬尘浓度有显著影响,颗粒密度和直径对无轨胶轮车头前23~28 m范围内中间高度和行车侧扬尘浓度有显著影响。
In order to investigate the rules and influencing factors of dust emission in the trackless rubber-tyred vehicles, a three-dimensional model of dust emission during the driving process of the underground trackless rubber tire cart was established based on COMSOL Multiphysics5.0. Research dust distribution, dust concentration, wind speed, particle density, particle diameter, trolley tire speed and other 5 factors and 5 levels of 25 kinds of circumstances, the distribution of dust concentration. Analyze the influence of the above five factors on the dust concentration in different spatial locations. The results show that the trend of dust concentration distribution is different at different heights in the roadway when the rubber-free trolley runs; the dust load has a significant effect on the dust concentration in the whole roadway; the wind speed in the range of 5m from the tail of the trolley to the front of 23m Dust density had no significant effect on driving speed. The driving speed had a significant effect on the middle height and driving dust concentration in the range of 3 ~ 28 m before the head of the trolley tire. The particle density and diameter had a significant influence on the mid- Side dust concentration has a significant impact.