| 摘要 |
The rockbolt anchoring head comprises a first wedge member with a wedge surface and a passage to receive the rockbolt, and a second wedge member with a complemental wedge surface. The second wedge member is connected to the rockbolt. The wedge surfaces of the first and second wedge members are arranged in slideways relationship with one another, and a spring acts between the members to cause relative slideways movement between the wedge surfaces. In combination, the wedge members form a body which is rectangular in a cross-section taken transversely to the axis of the rockbolt.
|
