Improved cable bolt

Details Improved cable bolt Improved cable bolt

E - Fixed Constructions

21

D

E21D 21/00 (2006.01) E21D 20/02 (2006.01)

Patent

CA 2533999

A cable bolt is provided that is suited to stabilise rock surfaces, particularly to withstand loads placed on the cable bolt when tensioned to stabilise rock surfaces of coal mines. The cable bolt comprises a tendon composed of a plurality of strands, the tendon having a plurality of pre- formed bulbous portions. The bulbous portions house rigid elements, such as a ball bearing, which are inserted after the bulbous portions are formed. When the cable bolt is tensioned or stressed, the load placed on the bulbous portion will be resisted by the rigid element housed within the bulbous portion, thereby preventing the bulbous portion from collapsing.

Boulon d'ancrage adapté pour stabiliser des surfaces rocheuses, en particulier pour résister à des charges exercées sur le boulon d'ancrage lorsqu'il est tendu pour stabiliser des surfaces rocheuses de mines de charbon. Ledit boulon d'ancrage comporte un câble de contrainte composé d'une pluralité de brins et possédant une pluralité de parties renflées préformées. Les parties renflées contiennent des éléments rigides, tels qu'une bille de roulement, qui sont introduits une fois les parties renflées formées. Lorsque le boulon d'ancrage est tendu ou contraint, l'élément rigide placé dans la partie renflée résiste à la charge exercée sur ladite partie renflée, ce qui empêche la partie renflée de s'écraser.

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