A cable bolt

E - Fixed Constructions – 21 – D

Patent

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Details

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

Patent

CA 2265593

A cable bolt (10) for use in mining excavations comprising a plurality of generally closely spaced wires or strands (11) which have a first end for fitting into a bore hole (21) formed in an excavation and a second end which is terminated within a cylindrical sleeve (17). The sleeve (17) has a threaded external surface for receiving a lock nut (18) which is tightened against a bearing plate (19) so as to tension the cable bolt (10). The wires or strands (11) are separated outwardly from a central longitudinal axis of the cable bolt (10) at spaced locations along the length of the cable bolt to form a "bird cage" (13) at each location. Spacers (14) are provided at each location to cause the outward separation of the wires or strands (11). A central tubular member (12) extends along the axis through the sleeve (17) and each spacer (14).

La présente invention décrit un boulon serre-câble (10) employé lors des excavations minières comprenant généralement une série de fils et de brins serrés (11) possédant une première extrémité à insérer dans un trou de forage (21) percé dans une excavation et une seconde extrémité terminée par un manchon cylindrique (17). Le manchon (17) présente une surface externe filetée pouvant recevoir un contre écrou (18) bloqué contre une plaque d'appui (19) permettant de serrer le boulon serre-câble (10). Les fils ou brins (11) s'écartent par rapport à un axe longitudinal du boulon serre-câble (10) aux emplacements situés le long dudit câble formant ainsi une "cage d'oiseau" (13). Des entretoises (14) sont disposées à chacun desdits emplacements pour écarter les fils ou les brins (11). Un élément tubulaire central (12) s'étend le long de l'axe du manchon (17) et chaque entretoise (14).

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