Rock bolt
AssigneeMsp Mine Support Products (Pty) Ltd
InventorCHRISTIAN ENGELSTOFT NISSEN
Life of this patent
Estimating the term…
Abstract
A rock bolt which includes a tubular member made from aluminium which is at a fixed position inside or outside a borehole, a cable which goes through the tubular member, and a steel barrel, secured to the cable which deforms the tubular member to give a yielding action with rock movement.
Claims12
A rock bolt which includes an elongate member, a tube which is made from a first material and which has a bore, an inner surface opposing the bore and an outer surface, and a barrel which is fixed to the elongate member and which is located at least partly in the bore, wherein the barrel is made from a second material which is harder than the first material and includes yield formations, configured to engage with the inner surface of the tube and to deform the first material in response to a tensile force exerted on the elongate member which forces the barrel further into the bore.
Dependencies are inferred from the claim text.