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为明确附壁风筒径向分风与巷道压风配比对风幕阻尘的影响,建立了三交河煤矿2-5082综掘面等比例物理模型,并运用FLUENT软件对压风量Q为350~600m~3/min、附壁风筒径向分风量与压风量配比B为50%~90%条件下的风流运移及粉尘扩散情况进行数值模拟分析.结果表明,综掘面Q的降低以及B的增加有利于在迎头范围内形成阻尘风幕,迎头风流场阻尘能力亦随之增强.对于2-508_2综掘面及与其生产条件相似的综掘面而言,当Q为350~400m~3/min,B为80%~90%及Q为450m~3/min,B为90%时能够在综掘司机前部断面空间形成有效阻尘风幕,其中,Q为350m~3/min、B为90%时风幕阻尘效果最佳.将数值模拟结果在2-5082综掘面进行工程应用,实测结果表明数值模拟结论较为准确,附壁风筒形成的阻尘风幕能够将50mg/m~3以上的高浓度粉尘阻控在距迎头10m以内的巷道空间内,有效改善了综掘区域作业环境.
In order to clarify the influence of the radial air distribution of the side wall and the air pressure ratio of the airway on the dust blocking of the air curtain, an equal-proportion physical model of 2-5082 fully-mechanized mining face of Sanjiaohe coalmine was established. The FLUENT software was used to measure the air pressure Q ~ 600m ~ 3 / min, the airflow distribution and dust diffusion under the condition of 50% ~ 90% Decrease and B increase is conducive to the formation of dust-resistant air curtain in the head-on range, and dust-holding capability of the headwind flow field is also enhanced.For the 2-508_2 comprehensive excavation surface and the synthetic excavation surface with similar production conditions, when Q is 350 ~ 400m ~ 3 / min, B is 80% ~ 90%, Q is 450m ~ 3 / min and B is 90%, an effective dust screen can be formed in the cross section space of the driver. ~ 3 / min and B is 90%, the dust-screening effect of the air curtain is the best.The results of numerical simulation are applied in the 2-5082 comprehensive mining face.The results show that the numerical simulation results are more accurate, The air curtain can control the high concentration dust of 50mg / m ~ 3 or more within the tunnel space within 10m from the head and effectively improve the working environment of the fully-digging area.