Strong ground pressure type blowout preventer

The utility model discloses a strong ground pressure type blowout preventer and belongs to the technical field of coal mine safety. The device is characterized by comprising a drill rod clamping mechanism and a base, the drill rod clamping mechanism is in butt joint up and down, and a drill rod penetrates through a drill rod channel (7); the drill rod clamping mechanism comprises an upper cylinder(4); the bottom of the upper cylinder (4) is connected with the base; wherein a plurality of slips (3) are uniformly arranged in an inner cavity of the upper barrel (4), the slips (3) are distributedon the outer ring of a drill rod and used for clamping the drill rod, and slip locking bolts (5) in one-to-one correspondence with the slips (3) are further arranged and penetrate through the barrelwall of the upper barrel (4) from the outer ring of the upper barrel (4) to be connected with the corresponding slips. According to the strong ground pressure type blowout preventer, the drill rod clamping mechanism is arranged