一、双列风筒通风的提出和应用效果地质勘探巷道通风，由于巷道掘进工期短不便建立主扇系统，一般采取巷道掘进到哪里，一列小断面风筒就接到哪里的局部通风形式。这种通风在巷道没有分枝前，即使深度较大也可收到好的效果。但巷道分枝后，通风就困难了，分枝越多困难越大。而分枝多又是地质勘探巷道的主要特点，所以多分枝巷道的通风是整个地质勘探巷道的关键。巷道分枝后的通风所以困难，主要是同时生产的工作面增加，风量不够分配。要使这个问题求得解决，一是选用大断面风筒和大风量扇风机；二是双列风筒 First, the proposed double ventilation ducts and the effect of geological exploration Roadway ventilation, due to the short duration of the tunneling project to establish the main fan system, generally taken to where the roadway tunneling, a small section of the duct received where the local ventilation. This ventilation in the road without branches before, even if the depth can also receive good results. But after the roadway branches, ventilation is difficult, the more branches the more difficult. The branches and more geological exploration roadway is the main feature, so the multi-branch roadway ventilation is the key to the entire geological exploration roadway. Ventilation after the branch roadway so difficult, mainly the simultaneous increase in production of work surface, the amount of wind is not distributed. To solve this problem, one is the choice of large cross-section of the fan and the wind blower fan; the second is the double-row hairdryer