What requirements should tunnel blasting meet to prevent gun smoke poisoning?

(1) When blasting, all personnel in the hole should be evacuated from the hole; (2) Strictly implement the ventilation management system, observe the smoke exhaust time regulations, and enter the hole only after all the gun smoke in the hole is discharged, and never allow anyone to enter the hole at the risk of gun smoke; (3) When gun smoke is found to escape from the blasting pile or rock crevice, cover your nose and mouth with a wet cloth as soon as possible, and notify all personnel in the cave to evacuate as soon as possible; (4) If conditions permit, gun smoke can be eliminated by sprinkling water; (5) General dust masks can only prevent dust, not smoke. If necessary, the operator must wear a gas mask before entering the gun smoke; (6) Install the ventilator and air duct according to the design requirements, and regularly check the ventilation facilities to ensure that they are repaired with the deterioration; (7) Do a good job in gun smoke detection and conditionally install gun smoke alarm equipment.