关键词: 超前巷道, 端部覆岩结构, 切顶关键参数, 巷道围岩控制

Abstract: In response to the problem of larger deformation in roadway advanced of working face, the influence of the movement characteristics of the overburden structure to deformation of the advanced roadway at the end of the working face was studied. The mechanism of roof cutting and pressure relief of the advanced roadway and the key parameters of roof cutting were analyzed, and the field test was carried out. The results show that the root cause of the deformation of the advanced roadway in the working face was the downward movement of the arc triangle roof. The weight and loading acting on the roof of the roadway during the advancing process of the working face. The advanced and lateral stress concentration were the intermediate processes. Reasonable cutting thickness and cutting angle can effectively cut off the linkage effect between the roof above the roadway and the roof of the working face, and cut off the tendency transfer of the advanced pressure. After the application of the research results, the single roof support was canceled in the advance roadway. Compared with that before unloading without roof cutting, the cumulative deformation of roof and floor was 1/5 of the original, and the cumulative displacement of two sides was 1/3 of the original.