关键词: 层次注浆, 切顶卸压, 沿空留巷, 围岩变形

Abstract: In order to solve the large deformation problem caused by faults in the roadway along the roadway with empty top cutting, the displacement of the roadway and the monitoring of the roof separation were used to obtain the deformation law and surrounding rock structure of the surrounding rock after the roadway was broken. A layered grouting technology with a new type of inorganic grouting material and grouting technology as the core, grouting reinforcement treatment of the roadway. The engineering practice results were shown that after the layer grouting reinforcement, the surrounding rock deformation was quickly controlled, the roof subsidence was controlled within 25mm, and the roof separation was only about 2mm; the roof watering problem is solved, and the surrounding rock fissure is effective. Filling and strengthening, the roadway deformation entered a stable stage, which can meet the later use.