胶带运输巷道粉尘分布规律及其控制

通过对245胶带运输巷道内粉尘浓度的现场测定与分析，发现转载点和落矿点的粉尘浓度严重超标。为此，建立井下运输巷道的物理模型，采用Fluent软件对胶带运输巷道粉尘运动进行数值模拟研究，确定了巷道内粉尘运移规律。结果表明:当平均风速为3 m/s时，巷道内粉尘浓度最低; 巷道内粉尘浓度大小与胶带运行速度成正比。根据数值模拟的结果，结合某大型金属矿山的实际情况，制定了一套适用于胶带运输巷道的降尘措施。该措施实施后，胶带运输巷道内粉尘浓度最大的落矿点处由60.5 mg/m3降低到9.5 mg/m3，降尘效果显著，巷道内作业环境得到较大改善。 

On the dust distribution law and control of belt haulage roadway

Through field measurement and analysis of dust concentration in 245 belt haulage roadway, we found that the dust concentration at transfer point and drop point exceeded the standard. Therefore, the physical model of underground transportation roadway is established, and the dust movement in belt transportation roadway is numerically simulated by Fluent software, by determining the law of dust movement in roadway. The results show that, when the average wind speed is 3 m/s, the dust concentration in roadway is the lowest. The dust concentration in the roadway is proportional to the belt running speed. According to the results of numerical simulation, combined with the actual situation of a large metal mine, a set of dust reduction measures suitable for belt haulage roadway were formulated. After the measures were installed and implemented, the falling point with the highest dust concentration in the belt haulage roadway was reduced from 60.5 mg/m3 to 9.5 mg/m3, with a remarkable dust reduction effect. Thus, the working environment in the roadway was greatly improved.