掘进工作面压入式通风流场的数值模拟

Numerical simulation of forced ventilation flow field in driving face

由于井下作业的特殊性,掘进工作面必须应用局部通风系统。针对掘进工作面压入式通风,依据空气动力学、流体力学、紊动射流等理论以及风流流动特性,结合某矿山115m中段掘进面的实际情况,利用Fluent软件对掘进工作面的风流流场进行数值模拟研究。结果表明,风流流场存在附壁射流、冲击射流、回流以及涡流4个分区。风筒出口的射流区正下方小块区域和巷道顶部区域风速极低,这可能导致巷道内存在通风盲区,需对此处加强通风管理。

Due to the particularity of underground operation, the local ventilation system must be applied to the driving surface. Combined with the actual conditions of a mine at l15m sublevel, and according to the driving surface ventilation and on the basis of aerodynamics, fluid mechanics, the turbulent jet theory and the air flow characteristics, the numerical simulation of driving surface flow field was conducted by using Fluent software. The results show that the air flow field has four parts which are wall attached jet, impinging jet, flow and vortex. In the below area of jet zone of air dust exit and at the top of the tunnel, the speed of the air flow is very low, which may result in the blind zone of ventilation, so it must be strengthened in ventilation management.