| 摘要 |
PURPOSE: A rockbolt and a timbering method using the same are provided to improve timbering force by using grout materials and expanding hollow shape body of the rockbolt. CONSTITUTION: A rockbolt(100) comprises a hollow body(110) and a grout injection unit(200). The hollow body comprises a hollow for the insertion of expansive additive. The grout injection unit is coupled with the hollow body and installed in a punch for injecting grout materials. |
