井下无风墙辅扇动压通风的分析及其应用

Analysis of Dynamic Pressure Ventilation by Auxiliary Fan without Ventilation Wall in Underground Mine and Its Application

利用无风墙辅扇调节矿井通风网络和作业面的风流是一种非常有效和灵活的方法。应用矿井空气动力学理论分析了井下无风墙辅扇全压对巷道做功,克服井巷通风阻力,造成风流流动的过程;指出了需要充分利用风流动压的方向性,将扇风机的全部输出能量转化为动压形式进行通风;并着重分析了无风墙辅扇通风应注意的一些技术问题。

The application of auxiliary fans without ventilation wall is a very effective and flexible approach to adjust the air flow rates in a mine ventilation network. In this paper, by using the aerodynamic theory for mine ventilation, an analysis is made on airflow process of total pressure ventilation and overcoming ventilation resistance in laneway by auxiliary fan without ventilation wall. It is pointed out that fully using the dynamic pressure with correct direction is very important in order to change all speed energy into dynamic pressure of ventilation. Also, some key technical issues are suggested for the application of dynamic pressure ventilation by anxiliary fan without ventilation wall in mine.