Forward support bolt combined with roop rock by bolting can play a roll of combined beam, which can prevent roofrock 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。
2
The numerical model of roofbolting and rock mass collaboration was based on Hoek Brown's strength criterion.
基于虎克-布朗强度准则给出了岩体及顶板锚固的数值模型。
3
Roof falling of rockbolting supported tunnel is usually paroxysmal in a big area, so safety monitoring is of great importance.