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基于深部巷道分层破坏现象机理的分析,开展了深部巷道物理模拟破坏试验。结果表明:巷道的破坏自巷道底板开始,向侧墙和拱顶部位依次发展,在拱脚部位不但产生裂缝,而且会产生向巷道内的明显位移;左侧墙最远裂缝距巷帮距离为80 mm,割裂体宽度范围为3~20 mm;右侧墙最远裂缝距巷帮62 mm,割裂体宽度为3~17 mm;底板最远裂缝距巷帮距离为120 mm,割裂体宽度为10~33 mm;拱顶最远处裂缝距巷帮距离为60 mm,割裂体宽度为5~35 mm。针对巷道围岩变形特征,采用高预应力锚杆锚索注浆分次支护,巷道围岩变形得到了有效控制。
Based on the analysis of the mechanism of delamination and delamination in deep roadways, the physical simulation of deep roadway destruction was carried out. The results show that the destruction of the roadway starts from the floor of the roadway and progresses to the side wall and the vault area in turn. Not only cracks occur in the arch foot but also obvious displacement to the roadway. The farthest distance of the left wall from the laneway is 80 mm, width of split body is 3 ~ 20 mm; the farthest crack in the right wall is 62 mm away from the laneway; the width of the split body is 3 ~ 17 mm; the farthest crack in the floor is 120 mm away from the laneway; 10 ~ 33 mm; the farthest vault crack away from the roadway for the distance of 60 mm, the width of 5 ~ 35 mm. Aiming at the deformation characteristics of the surrounding rock of the roadway, the grouting of high prestressed anchor and grouting grouting is carried out and the deformation of the surrounding rock of the roadway is effectively controlled.