Abstract: When the excavation of the return air channel in the 22407 working face of Bulianta Coal Mine is completed, the area with the weakest support strength will be deformed first under the influence of tectonic stress, but the normal use of the roadway will not be affected.After stoping in adjacent fully mechanized face, the deformation of surrounding rock in weak area of roadway support is serious, which leads to instability in other areas of roadway, the pressure of roof separation, spindles and bottom bulge is aggravated.In order to ensure the safety and high efficiency of 22407 fully mechanized mining face, it is necessary to reinforce the roof of the return air channel in the 22407 working face and deal with the floor heave area.