Self drilling rock bolt

摘要

The present invention relates to a self drilling rock bolt which may be used in mining applications. Self drilling rock bolts are typically formed by rebars having an axially extending central passageway for water passage and post grouting. Costs of such hollow steel rebars is quite high. In the present invention, a rock bolt is formed from a hollow tubular member which may be steel pipe, and a reinforcing arrangement comprising prestressed concrete type steel strand wound around the outside of the hollow tubular member.

主权项

1. A rock bolt comprising:
a shank portion comprising a rigid, hollow tubular member and a reinforcing arrangement comprising strands of material mounted about an outer wall of the hollow tubular member; and a drill bit mounted on the rigid, hollow tubular member, wherein the rigid, hollow tubular member is configured to provide sufficient strength to withstand rotation and impact of the drill bit with rock when the rock bolt is utilized to drill into the rock, wherein the reinforcing arrangement is secured to a first end of the rigid, hollow tubular member by a drive nut having a plurality of bores for receiving the strands of material, the strands of material each having a button head to secure the strands of material within the plurality of bores of the drive nut.