目前,通风问题仍是独头长巷道掘进施工中遇到的主要问题之一,特别是小断面沿脉掘进巷道,若风筒直径太大,节长太长,通风阻力和漏风也较大,目前厂家推出的一些高效节能局部扇风机,仍属大风量, At present, the ventilation problem is still one of the major problems encountered in the construction of single headway tunneling. In particular, the small section along the arterial roadway, if the duct diameter is too large, the length is too long, ventilation resistance and air leakage are larger, At present, some manufacturers introduced high efficiency and energy saving fan, still a large amount of wind,