Systematic rockboltsupport and shotcrete were carried out for the surrounding rock and reinforcement was done locally for rock stability.
对围岩采用系统喷锚支护，局部作加强处理，稳定性良好。
2
Forward supportbolt combined with roop rock by bolting can play a roll of combined beam, which can prevent roof rock caving immediately after explosion.
超前支护锚杆锚固后与顶板岩石构成一体，这样使超前锚杆形成组合梁作用，放炮后，能够阻止顶板岩石冒落。
3
The article analysed national situation of bolt shotcrete and wire in soft rock, based on theory of broken-rock circle, concluded the relation of broken-rock circle and soft support.