Segmented and layered circular grouting construction method for reuse roadway of soft coal seam

The invention discloses a segmented and layered circular grouting construction method for a reuse roadway of a soft coal seam, belongs to the field of mining engineering, and can solve the problems that when roadway surrounding rock loosening and breaking integrity is poor due to repeated dynamic pressure of an existing soft coal seam, roadway side grouting reinforcement is serious in grout leakage, poor in grouting reinforcement effect, frequent in equipment carrying, unreasonable in working procedure and the like. A roadway is segmented according to a certain length, roadway side grouting reinforcement drill holes are formed in the segments, construction is conducted according to the sequence of shallow first and deep second, from bottom to top and staggered at intervals, and different grouting materials and grouting parameters can be adopted according to the communication conditions of cracks with different depths; by means of the method, roadway side slurry leakage and equipment carrying can be effectivel