Application of Coupling Release-pressure Support Technology in Dynamical Pressure Roadway

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.