Bolting-grouting on the different level by bolting-grouting mechanism in bad repaired roadway,can guarantee the stability of repaired tunnel and the need of tunnel ventilation and transportation.

• 运用锚注支护机理,对失修巷道进行不同层次的锚注,能够保证修复后巷道的稳定性,保证巷道通风、运输的需要,具有积极的推广运用价值。