Coal mine tunnel floor heave treatment method

The embodiment of the invention discloses a coal mine roadway floor heave treatment method which can effectively solve the problem of roadway floor heave. Comprising the steps that a drilling machine drills a hole downwards in a mine roadway bottom plate through a twist drill rod; an orifice pipe is installed at an orifice of the drill hole, the orifice pipe is provided with a 7-shaped flow guide pipe, and the orifice pipe goes deep into the drill hole by a preset distance; replacing a twist drill rod with a stirring drill rod, wherein a drill bit at the end part of the stirring drill rod is a crushing drill bit; a deslagging slurry pump and a high-pressure gas pipeline are connected through a three-way valve, deslagging slurry is guided into the drill hole through an outlet of the three-way valve, and the 7-shaped flow guide pipe is communicated to a sedimentation tank; a deslagging slurry pump is opened, the gas-liquid proportion is adjusted through a three-way valve, and bubbles are formed in the drill hol