【摘要】 根据现有注浆锚杆存在的问题，设计了内锚外注式新型锚杆，该锚杆具有较高的初锚力，可滞后于掘进工作面，巷道围岩变形发展到一定程度时再进行注浆；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。更多还原

【Abstract】 Abstract To counter with the backwards of current grouting bolts, a new type ofbolt with deeper portion anchored and shallower portion grouted is designed.This kind of bolts are of higher initial anchored force. Its groutingprocedure can be carried out after the deformation of roadway reachescertain extent behind driving face. 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. Atlast, a field testing results are provided.更多还原