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US 12,760,649 B2Granted
Rock bolt installation
AssigneeSandvik Mining and Construction Australia (Production/Supply) Pty Ltd
InventorsSteven Weaver, Mietek Rataj, Jamie Wang
Life of this patent
Estimating the term…
Abstract
A rock bolt installation for a hole formed in a rock strata includes a cable bolt and a friction bolt disposed within the hole. The cable bolt can be embedded in grout, cement or resin. The cable bolt extends further into the hole than the friction bolt. The cable bolt and the friction bolt are disposed in an overlapping relationship within the hole and are connected structurally in the overlap to each other and to the internal wall of the hole.
Claims13
A rock bolt installation comprising:
- a cable bolt and
- a friction bolt, the cable bolt and the friction bolt being arranged to be disposed within a hole formed in a rock strata, the cable bolt extending further into the hole than the friction bolt, wherein the cable bolt and the friction bolt are disposed in an overlapping relationship within the hole and are connected structurally in an overlap to each other and to an internal wall of the hole, wherein the friction bolt includes an expander mechanism arranged to clamp against the internal wall of the hole, and wherein expander elements of the expander mechanism are shaped to accommodate a cable of the cable bolt so that the cable can extend past or through the expander mechanism in either axial direction within the hole, and wherein the expander elements of the expander mechanism engage the cable of the cable bolt to clamp the cable to the internal wall of the hole.
A rock bolt comprising:
- a tendon having a leading end and a trailing end;
- an expander mechanism disposed at the leading end;
- and
- an anchor mechanism disposed at the trailing end, the expander mechanism including expander elements that are expandible into engagement with an internal wall of a hole, the expander elements being arranged to accept or accommodate a cable of a cable bolt, wherein the expander elements include a groove, slot or scallop for the cable to enter, wherein the expander mechanism is arranged to clamp against the internal wall of the hole, and wherein expander elements of the expander mechanism are shaped to accommodate the cable so that the cable can extend past or through the expander mechanism in either axial direction within the hole, and wherein the expander elements of the expander mechanism engage the cable of the cable bolt to clamp the cable to the internal wall of the hole.
1 more element
Dependencies are inferred from the claim text.