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针对岩巷综掘面粉尘质量浓度高且难以控制的难题,利用数值模拟与现场测试相结合的手段分析了多径向涡形风控制岩巷综掘面粉尘污染规律.结果表明:多径向涡形风应用后,压风量、压抽比越小,越利于形成轴向指向迎头流动且风速均匀的控尘风幕;压风量越大,压抽比越小,50mg/m3以上粉尘扩散距离越小,并得出了随压风量、压抽比变化的函数关系;压抽比为0.75时,形成的控尘风幕较优,高质量浓度粉尘扩散距离为3.4m,掘进机司机处粉尘质量浓度为19.6mg/m3,且易于现场应用.现场测试与数值模拟结果基本一致,应用多径向涡形风且压抽比为0.75时,距迎头5.5m断面测点的粉尘质量浓度已降至18.9mg/m3以内.
In view of the problem of high dust concentration and difficult to control in comprehensive excavation of rock roadway, the paper analyzes the law of dust contamination on the comprehensive excavation face of rock roadway by means of the combination of numerical simulation and field test. The results show that the multi-radial After the application of the scroll-shaped wind, the amount of air pressure and the pressure-pumping ratio is smaller, the more conducive to the formation of a dust-controlled air curtain headwardly flowing and uniform wind speed; the greater the amount of air pressure, the smaller the pressure pumping ratio, The smaller the air pressure and the pressure, the smaller the pressure is, the smaller the pressure is and the smaller the pressure is. The mass concentration is 19.6mg / m3, and it is easy to apply on site.The results of field test and numerical simulation are basically the same. When the radial wind pressure is 0.75 and the compression ratio is 0.75, To 18.9mg / m3 or less.