1. Anchor drilling and installation
1) Self drilling rock bolt construction program: install the bolt, then grouting.
2) Check the rock bolt hole, if there is blockage in drill water hole, if any, should be cleaned.
3)Check if the connection between the drill and self drilling rock bolt, rock drill and shank, drill sets and shanks, rock bolt and drill sets are solid.
4) Choose the self drilling rock bolt hole diameter and the corresponding rig, simple operation platform shall be built when drilling hole, and adjust angle of drill according to the design requirements of hole angle and position.
5) The anchor drill bit is aimed at the hole position of the measuring mark, and then water supply to the shelf and drilling.
6) After the drilling, the dust is flushed with the wind gun, while check whether the hole at the drill bit is smooth, and then the self drilling rock bolt is removed from the drill link.
7)Driving the stop-grouting plug through the exposed end of the rock bolt into the hole 100mm, the center bolt body is temporarily fixed, and then preparing the grouting.
2. Self drilling rock bolt grouting
1)Grouting with the bolt grout injector; slurry produced according to the design requirements for mixing ratio, grout cement ratio, humidity, etc. to meet the design requirements.
2) Check whether the self drilling rock bolt is unimpeded with air.
3) According to the design requirements of pressure grouting for grouting.
4)After grouting is completed, making the coverage of the surface layer of extending concrete steel mesh and anchor head welding firm, for the construction of concrete armor.