Abstract: In order to solve the problems of a large number of coal pillar losses in goaf excavation, which affect mining replacement, and prevent serious deformation of roadway during mining, it is decided to adopt the roof cutting pressure relief and comprehensive support scheme to effectively control the surrounding rock of roadway. Aiming at the composite roof of 21206 fully mechanized mining face of 2# coal seam, the parameters of cutting and relieving pressure are determined by theoretical analysis and FLAC3D numerical simulation. The cutting Angle is 15° and the cutting depth is 9 m. The goaf roadway is divided into advance supporting zone, delayed temporary supporting zone and stable roadway forming zone, and different supporting forms are adopted. With the implementation of comprehensive support scheme, the maximum roof subsidence within 60 days of retaining roadway along gob is reduced by 49.3%; The maximum value of two sides' proximity decreases by 57.3%; More than 156,000 tons of coal are recovered from the working face, and 1 excavation roadway with a length of 1710m is saved, and the construction period is saved for 6 months, which has significant economic benefits.