Abstract

The present invention provides a rock bolt comprising first and second portions (11, 12), wherein the first portion comprises an end (13) adapted for expansion to provide a point anchor. The second portion comprises an inner portion (35) and an outer portion (33) wherein the outer portion is configured for engagement with the end of the first portion to cause expansion thereof. The inner portion is configured for engagement with the outer portion to cause expansion thereof, whereby expansion of the outer portion causes further expansion of the end of the first portion.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

The present invention provides a yielding rock bolt (10) comprising a tendon in the form of a steel shaft (12) and an anchor member (14), having a longitudinal bore, mounted on the tendon. The anchor member presents a compression zone (50) to the tendon about the longitudinal bore whereby the tendon, upon being moved through the anchor member towards the compression zone, is caused to undergo plastic deformation at the compression zone to reduce in diameter and increase in length, The compression zone is defined by an inclined face (51) provided on the anchor member about the longitudinal bore.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

The present invention provides a rock bolt (14) comprising a cable (21) formed from multiple wound strands. The rock bolt also comprises a sleeve (16) surrounding the cable along at least portions of the cable, and multiple collars (17) spaced along the sleeve. Each collar being fitted on a different lengthwise region of the sleeve. The present invention also provides an elongate member (15) having a plurality of rock bolts connected in an end to end relationship.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

A ground support apparatus for use in supporting a rock body comprising an elongated support member, an elongated collar and a localised anchor means. The localised anchor means is adapted to substantially restrain the apparatus within a borehole formed within the rock body. The elongated collar comprises a lumen that receives the elongated support member and, additionally, comprises a flange assembly that, at least in part, substantially abuts a rock face of the rock body. In use, a movement of the rock body causes the elongated collar to travel, at least in part, along the elongated support member thereby permitting the apparatus to yield and govern the rock body movement.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection
• E21D 20/00 - Setting anchoring-bolts

Abstract

A ground support apparatus for use in supporting a rock body comprising an elongated support member, an elongated collar and a localised anchor means. The localised anchor means is adapted to substantially restrain the apparatus within a borehole formed within the rock body. The elongated collar comprises a lumen that receives the elongated support member and, additionally, comprises a flange assembly that, at least in part, substantially abuts a rock face of the rock body. In use, a movement of the rock body causes the elongated collar to travel, at least in part, along the elongated support member thereby permitting the apparatus to yield and govern the rock body movement.

IPC Classes  ?

• E21D 20/00 - Setting anchoring-bolts
• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

A ground support apparatus comprising a first portion comprising elongate friction means for substantially anchoring the apparatus in a bore hole formed within a rock, body, a second portion disposed substantially towards a front end of the apparatus and which abuts the first portion, a localised anchor means disposed at a junction between the first portion and the second portion and a yielding mechanism. In use, a movement of the rock body engages the yielding mechanism thereby governing the rock body movement.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

A ground support apparatus comprising a first portion comprising elongate friction means for substantially anchoring the apparatus in a bore hole formed within a rock, body, a second portion disposed substantially towards a front end of the apparatus and which abuts the first portion, a localised anchor means disposed at a junction between the first portion and the second portion and a yielding mechanism. In use, a movement of the rock body engages the yielding mechanism thereby governing the rock body movement.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

The present invention relates to a rock bolt 10 for use in stabilising a rock face. The rock bolt 10 comprises a body 12 having a plurality of elongate lobes 22 spaced apart by substantially resilient channel means. The rock bolt 10 is further configured to receive expansion means for urging the lobes 22 outwardly to thereby expand the rock bolt 10 for improving a communication with a bore hole in the rock face. Following expansion the expansion means may be removable, the expansion means can comprise any suitably sized hollow or solid bar expansion member. The configuration of the present invention also enables, subsequent to an initial expansion, the resilient channel means to provide a gripping force on any suitably sized member inserted into the internal space. This feature of the rock bolt 10 allows for a mesh plate having an elongate portion to be securely and removably fitted to the rock bolt 10 after the rock bolt has been expanded.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Goods & Services

(1) Cable bolts and rock bolts. (2) Mine roof bolts, twist cables and anchors, ground anchors, rock anchors. (3) Cable bolts, mine roof bolts, rock bolts, twist cables and anchors, ground anchors, expansion anchors, rock anchors, friction rock stabilisers, mine roof plates and mine bearing plate.