Ventilation system for mine

A ventilation system for a mine belongs to the technical field of mine ventilation and comprises an air inlet shaft and an air return shaft, at least one mine layer is arranged between the air inlet shaft and the air return shaft, adjacent mine layers are communicated through an air return channel, the uppermost mine layer is communicated with the air return shaft through an air return channel, and the air inlet shaft is communicated with an air heating mechanism. Air entering the mine layers can be heated, the ventilation comfort degree in winter is guaranteed, and a dust falling mechanism is arranged in each mine layer; the dust falling mechanism is composed of a spraying water tank and a plurality of nozzles arranged at intervals in the length direction of the mine layer, the nozzles communicate with the spraying water tank through water pipes, the spraying water tank is composed of a feeding box and a box body, and the feeding box is fixedly installed at the top of the box body and communicates with the b