Mining underground drilling blowout preventer

The utility model discloses a mining underground drilling blowout preventer. The mining underground drilling blowout preventer comprises a fixing clamping hoop, a guiding cylinder, a gas discharge port, a water supplying port, a water spraying ring, a positioning bayonet lock and a slag discharging port. The gas discharge port is fixedly formed in the upper portion of the guiding cylinder, the slag discharging port is formed in the lower portion of the guiding cylinder, the fixing clamping hoop is placed at the left end of the guiding cylinder, a sealing gasket is arranged inside the right end of the guiding cylinder and is squeezed and blocked by the positioning bayonet lock, the water spraying ring is placed inside the right of the guiding cylinder, the water supplying port is formed in the upper right portion of the guiding cylinder, the water spraying ring is communicated with the water supplying port, the water spraying ring is located between the slag discahrging port and the sealing gasket, and water s