高海拔掘进巷道混合式通风参数优化

针对高海拔低压低氧的工作环境下混合式通风系统参数优化,以西藏某铜矿为研究背景,使用FLUENT数值模拟掘进巷道内粉尘浓度在不同通风环境下变化规律,通过改变混合式通风的压风量、风筒位置和抽压风量比等通风参数进行对比实验,总结通风参数对粉尘运移的影响规律,进而对通风参数进行优化处理。模拟结果为当压风量为150m~3/min,压、抽风筒出风口分别与掘进面距离为14m、2m,抽压风量比为0.9时,粉尘质量浓度大幅度降低。通过现场实验验证数值模拟结果与实际状况大致相符。

Parameters optimization of combined ventilation in an excavation roadway of high-altitude mine

In order to study the parameter optimization of mine combined ventilation system at high altitude, a copper mine in Tibet was taken as background, by using fluid mechanics software FLUENT, the concentration distribution of dust in the excavation roadway under different ventilation environment was simulated based on the gas-solid two phase flow theory. By changing combined ventilation parameters including pressure volume, location of ventilation tube and pumping air volume ratio, the influence of the ventilation parameters on dust transport was summarized to optimize the combined ventilation parameters. The simulation results: when the pressure volume is 150m₃/min; pressure tube and ventilation tube outlet is respectively at a distance from the heading face for 14m and 2m; pumping air volume ratio is 0.9, the concentration of dust was reduced greatly. The numerical simulation results are roughly in line with the actual situation through the field experiment.