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针对煤矿综掘面粉尘治理技术中存在的不足,采用泡沫降尘新技术结合长压短抽式通风方式进行粉尘防治。以霍尔辛赫矿为例,根据井下实际情况,利用GAMB IT和FLUENT建立掘进巷道的几何模型,并对巷道掘进通风过程中粉尘分布规律进行解算,将模拟结果和现场实测数据对比,确定掘进面回风侧的高浓度粉尘分布区。对掘进面煤样进行湿润性试验,确定最佳的发泡剂添加比例。综合以上情况,泡沫降尘技术实施时采用环形前置式喷头布置,发泡剂添加比例定为10‰,并在回风侧距掘进面5 m、距底板2 m处设置风筒,将高浓度粉尘抽出并沉降。现场实测数据显示,泡沫降尘技术降尘效率明显高于喷雾降尘技术。使用泡沫降尘时,在司机侧测得全尘及呼吸性粉尘降尘效率分别达到75.4%和74.7%。
Aiming at the shortcomings in coal mine comprehensive digging dust control technology, new technology of foam dust reduction combined with long-pressure short-pumping ventilation is adopted to prevent and control dust. Taking Horsinhich mine as an example, according to the actual underground conditions, the geometric model of roadway driving is established by using GAMB IT and FLUENT, and the law of dust distribution in roadway ventilation is solved. The simulation results are compared with the measured data to determine Driving side of the return air side of the high concentration of dust distribution. Wetting test was carried out on the coalface of tunneling surface to determine the best foaming agent addition ratio. Based on the above situation, the foam dust-suppression technology was implemented with a ring-shaped front showerhead. The proportion of blowing agent was set at 10 ‰, and at the return air side 5 m away from the heading face, a hairdryer was set at 2 m from the floor, Dust out and settle. Field measurement data show that the foam dust reduction dust reduction efficiency significantly higher than the spray dust technology. When using foam to reduce dust, the efficiency of dust reduction on all dust and respirable dust measured at the driver’s side reached 75.4% and 74.7% respectively.