the present invention relates to a self drilling rock bolt which may be used in mining applications . self drilling rock bolts are typically are 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 .