Ventilation structure for mine

The utility model discloses a ventilation structure for a mine, and relates to the technical field of mine ventilation. Comprising a ventilation pipeline and a plurality of mounting frames used for hanging the ventilation pipeline, each mounting frame comprises a first mounting plate, a sliding groove is formed in the surface of each first mounting plate, a second mounting plate is slidably arranged in each sliding groove, expansion bolts are symmetrically fixed to the upper surface of each second mounting plate, and the mounting frames are fixed to the top of a mine through the expansion bolts; a rotating shaft penetrates through the side face of the first mounting plate, a gear is fixed to the circumferential side face of the rotating shaft, and a rack is fixed to the side face of the second mounting plate and engaged with the gear. The exposed length of the second mounting plate is adjusted by rotating the rotating shaft, when the mounting position is narrow, the second mounting plate is extended by rotati