2. Starting from the air inlet of the heading face in the coal roadway, a set of compressed air self-help bags is set every 50m, and the number of self-help bags in each group is 5, and the group close to the head-on is not less than 15, and the distance from the head-on is 25 ~ 40 m; 100 to 130 m rock roadway heading face is equipped with a set of (15) compressed air self-rescue device, and a set of (5) compressed air self-rescue device is installed outward every 100m; A set of compressed air self-rescue device (5 bags) should be installed at the blasting evacuation site.
3. Set up a set of self-help bags within the range of 25 ~ 40m from the working face return air lane to the working face safety exit, and the number is 50; Install a set of (5) compressed air self-rescue device at the fixed working place where people are working; Set up a set of self-rescue bags in the air inlet roadway within 50 ~ 100 m from the safety exit below the working face, with a total of 50 bags; A set (5 sets) of compressed air self-rescue device is set at the warning position outside the air damper in the return air lane of the working face.