| 摘要 |
PURPOSE: A rockbolt and a timbering method using the same are provided to prevent the leakage of grout materials. CONSTITUTION: A rockbolt(100) comprises a hollow body(110), a grout injection unit(210), and a perforation covering unit(300). 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. The perforation covering unit covers the opening portion of the punch. |
