综掘工作面控风除尘技术数值模拟研究及应用
Numerical Simulation Research and Application of Air Control and Dust Removal Technology in Fully Mechanized Driving Face
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摘要: 以东城煤矿综掘工作面为研究对象,根据现场条件建立了几何模型,通过FLUENT对东城煤矿控风除尘系统的关键参数进行了数值模拟研究,分别对不同控风装置出口风量和供风风筒迎头出口风量比,以及布置不同组数控风装置条件下的工作面控尘效果进行模拟研究,得到了最佳的控风装置技术参数,并进行了现场应用。结果表明:当工作面控风装置出口风量和供风风筒迎头出口风量比为5∶1,工作面布置2组控风装置时,工作面控尘效果最佳,掘进机司机处的实测粉尘浓度由1 590 mg/m3降低到220 mg/m3,降尘效率达到了85%以上,取得了较好的降尘效果。Abstract: Taking Dongcheng Coal Mine comprehensive excavation working face as the research object, a geometric model is established according to the site conditions. Through Fluent software, the key parameters affecting the control device of the wind control and dust removal system in Dongcheng Coal Mine are numerically simulated. The control effect of the working face under the conditions of different control device outlet air volume, air supply duct head-on outlet air volume ratio and different groups of numerical control air devices arranged in the working face are studied respectively. Through the simulation research, the optimal technical parameters of the wind control device are obtained and applied in the field. The results show that when the ratio of the air volume at the exit of the air control device and the air volume at the head of the air supply duct is 5∶1 and two groups of air control devices are arranged in the working face, the dust control effect of the working face is the best. The measured dust concentration at the driver of the roadheader is reduced from 1 590 mg/m3 to 220 mg/m3, and the dust reduction efficiency is over 85%.
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