Sandvik Mining and Construction Australia (production/supply) Pty Ltd

Sandvik Minina and Construction Tools Ab

Warren Roach

Bradley Darlington

Mieczyslaw Rataj

Steven Weaver

Mietek Rataj

Peter Young

A rock bolt includes a wedge-based expansion mechanism. The expansion mechanism includes a drive wedge arranged to expand an intermediate wedge upon tensioning of the rock bolt, wherein the intermediate wedge is arranged to expand a wedge device attached to an outer tube of the rock bolt. The use of the intermediate wedge enables greater expansion of the rock bolt.

Double-wedge rock bolt

A rock bolt arranged for installation within a bore formed in rock strata includes an elongate shaft with the leading end for installation into the bore and a trailing end projecting from an open end of the bore. A locking nut is threadably attached to the trailing end and is arranged to display product information and the like at a display face. The display face is recessed axially into the nut to provide protection against damage to the display face that may otherwise render the information unreadable.

Rock bolt with information display region

Growing community of inventors

Pinkenba, Australia

Warren Roach