Abstract:
To control the deformation of surrounding rock and the bolt fracture phenomenon of the dynamical pressure heading roadway, the study analyzes that the damage form of roadway is a typical destruction of the remaining coal pillar gob-side entry driving. According to the theoretical calculation, the coal mine selects coupling release-pressure anchor. The specifications for the anchor is
φ20 mm×2 500 mm; the roof bolt spacing is 1 000 mm×920 mm; the end anchor bolt spacing is 1 000 mm×1 000 mm; after adopting new supporting system, the biggest roof and end anchor rock deformation is 50 mm and 90 mm. The deformation rock of roadway receives effectively control.