Underground coal mine automatic powder spraying explosion suppression system

The utility model provides an underground coal mine automatic powder spraying explosive-proof system which is used for solving the technical problems that an existing explosive-proof device is complex in structure and large in machining difficulty, a piston is prone to being stuck, powder is inconvenient to load and the like. The powder spraying device comprises a powder spraying assembly, the powder spraying assembly comprises a triggering piston cylinder structure and a powder cover structure, the front end of the triggering piston cylinder structure is connected with the powder cover structure, and the rear end of the triggering piston cylinder structure is connected with a powder spraying assembly triggering mechanism; the trigger piston cylinder structure comprises a cylinder body, a piston is movably installed in the cylinder body, one end of the cylinder body is sealed, and the other end of the cylinder body communicates with the powder cover structure. A high-pressure air outlet cover and a triggering