矿井掘进通风循环风形成条件分析

Formation conditions of circulating air in mine drifting ventilation

针对矿井掘进循环风问题,简述了掘进通风系统与矿井通风主系统的关系,分析了局部通风机风筒出口直对工作面和风筒出口在掘进面一侧的联络道两种局部通风方法。详细介绍了两种情况下掘进通风中各节点的能量关系,并绘制了相应的能量坡度曲线,从能量坡度曲线更容易看出掘进通风中各节点能量大小及变化关系,从能量角度分析循环风的形成条件,对井下预防循环风形成具有重要意义。

In view of circulating air problems in mine drifting, brief elaboration was made of the relationship between drifting ventilation system and main mine ventilation system. Two local ventilation methods were analyzed, one with air duct outlet of local fan facing directly the working face, the other with air duct outlet in the taxiway at the drifting side. Detailed introduction was made of the energy relationship of each node in drifting ventilation in the two cases. Corresponding energy slope curves were drawn, from which node energy and its changing relationship of each energy node in drifting ventilation were easily seen. The analysis of formation conditions of circulating air from the perspective of energy is significant for the prevention of underground circulating air.