Abstract:
Based on the phenomenon analysis of deep roadway layering fracture, the physical simulation test of deep roadway was carried out. Test results show that the roadway failure starts from floor, and then the failure develops to side walls and roof. Cracks develop at the arch of the foot, and obvious displacement appears at the arch of the foot; the distance of the farthest crack in left wall from the roadway’s side is 80 mm, the range of fragmented body width is 3 mm to 20 mm; the distance of the farthest crack in right wall from the roadway’s side is 62 mm, the range of fragmented body width is 3 mm to 17 mm; the distance of the farthest crack in floor from the roadway’s side is 120 mm, the range of fragmented body width is 10 to 33 mm; the distance of roof farthest crack from the roadway’s side is 60 mm, the range of fragmented body width is 5 to 35 mm. The roadway is graded supported by the technology of high pre-stressed bolt and anchor grouting according to the deformation characteristics of roadway. Engineering application shows that the deformation of surrounding rock has been effectively controlled.