Pressure relief type fast-assembly temporary air door for underground coal mine

The utility model belongs to the field of coal mines. The pressure-relief type fast-assembly temporary air door comprises a plurality of steel pipe stand columns, a lifting device, a base, a metal hanging net and air duct cloth, the steel pipe stand columns are vertically arranged in a roadway, the bottoms of the steel pipe stand columns are connected with the base located on the ground of the roadway through the lifting device, and the tops of the steel pipe stand columns make contact with a roadway top plate; the base is a flat plate of which the bottom is provided with a plurality of arrow-shaped bulges; the metal hanging net is fixed to the steel pipe stand column, and the air duct cloth is fixed to the metal hanging net through a ribbon. The temporary air door is simple in structure and convenient to mount and dismount, the pressure effect of mine pressure on the air door can be adjusted at any time, bending and deformation of the temporary air door due to mine pressure influencesare eradicated, and the