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随着隧道工程掘进深度的加大，自然通风困难，需要利用通风管将风量送到工作面，以保证足够的新鲜空气、排除烟气、粉尘，供给人们所需的氧气。但随着深度加大，风管接头增多，由于密封性差，造成大量的新鲜空气中途漏失，到了工作面风量已甚少，使大量炮烟粉尘得本到排除，导
With the deepening of the tunneling project, natural ventilation is difficult. Ventilation pipes are required to send the air volume to the work surface to ensure sufficient fresh air, eliminate flue gas and dust, and supply oxygen for people. However, as the depth increases, the number of air duct joints increases, due to poor sealing, resulting in a large number of fresh air lost halfway to the face of the air volume has been very small,