Emergency inflation plugging system for subsurface tunnel

An emergency inflation plugging system for a subsurface tunnel comprises an air bag, an air compressor, a grouting machine and an emergency controller, a fixing part is arranged at the top of the air bag and used for positioning and fixing the air bag to the top of the tunnel to be plugged and conducting rapid preliminary unfolding on the air bag through the gravity effect, and an inflation connector and a grouting connector are arranged on the air bag and used for conducting grouting on the air bag. The air bag is communicated with the air compressor and the grouting machine through the inflation connector and the grouting connector respectively and used for inflation unfolding and double-liquid grout filling of the air bag, the emergency controller is connected with the air compressor and the grouting machine to control starting and stopping of the air compressor and the grouting machine, and a telescopic support is further arranged in the air bag and used for being unfolded in emergency to pre-unfold the a