The hole packing is simple, which isarranged at the collar of the drill hole.With this kind of bolting, thebest results co-operated bolting and grouting support can be achieved.Atl...

• 直接在孔口处封孔，封孔方式简单，达到锚杆支护与注浆加固共同作用的最佳效果．最后，给出了一个工程试验结果。