Safe passage device used in tunneling construction collapse

[0013] see figure 1 and 2 , the embodiment of the present invention is provided with an annular life-saving pipe 2 and a high-pressure air supply device ( figure 1 and 2 not shown). The pipe wall 3 of the annular lifesaving pipe 2 is a hollow sealed pipe wall, and the cross-sectional shape of the annular lifesaving pipe 2 is the shape of a swimming lifebuoy. An inlet and outlet valve ( figure 1 and 2 (not shown in the figure), the inlet and outlet valves are connected to the high-pressure gas outlet of the high-pressure gas supply device, and the wall material of the hollow sealing tube wall of the annular life-saving tube 2 is composed of 5 layers of rubber layers and at least 3 layers of carbon fiber layers. The composite material, the inner and outer surfaces of the hollow sealing tube wall are both rubber layers, and the carbon fiber layer is arranged between the two rubber layers. The annular life-saving pipe 2 is laid from the vicinity of the secondary lining 1 to the vicinity of the tunnel face 5 along the longitudinal direction of the tunnel. The inner diameter of the annular life-saving tube is 1.0m, and the outer diameter may be 1.2m. The high-pressure air supply device adopts the existing high-pressure air pump and other supporting devices ( figure 1 and 2 not shown). Reference numeral 4 denotes a collapse section area. Arrows indicate escape directions.