| 摘要 |
A rock bolt.(1) comprising an elongate body having torque limiting means at an outer end (3) of the body, the torque limiting means having at least one deformable protusion (2) that deforms under a predetermined torque. There is provided for the deformation of the deformable protusion (2) to prevent further rotation of the rock bolt (1) by a torque application apparatus. A further feature of the invention provides for the deformable protusion (2) to be shaped to receive a complementary shaped chuck on a torque application apparatus to facilitate transferring torque to the rock bolt (1). Further features of the invention provide for the deformable protusion to be protusions extending in an axial direction from an end surface of the rock bolt (1). |
