Frictional mining bolt

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 21/00 (2006.01)

Patent

CA 2505824

A system for mine roof reinforcement includes a bearing plate (16) and a tubular member (18) with an inner surface (22), an outer surface (24), first and second free ends, and an enlarged portion (28) disposed proximate one of the free ends. The system also includes a projectile (20) and an insertion member (32) for being received in the tubular member (18). In addition, a method for inserting a bolt in rock includes: forming a borehole in rock (14); placing a bearing plate (16) with an opening therein against the rock (14) so that the opening (16a) is aligned with the borehole (12); disposing a tubular member (18) in the borehole (12) and opening (16a) so that an enlarged end (28) of the tubular member abuts the plate (16); and mechanically expanding the tubular member so that an outer wall (24) thereof frictionally engages the rock (14).

La présente invention a trait à un système pour le renfort de toit de mine comportant une plaque de support (16) et un organe tubulaire (18) avec un face interne (22), une face externe (24), des première et deuxième extrémités libres, et une portion élargie (28) disposée à proximité d'une des extrémités libres. Le système comporte également un projectile (20) et un organe d'insertion (32) destiné à être reçu dans l'organe tubulaire (18). L'invention a également trait à un procédé d'insertion d'un boulon dans la roche comprenant : la formation d'un trou de forage dans la roche (14) ; la mise en place d'une plaque de support (16) présentant une ouverture contre la roche (14) de sorte que l'ouverture (16a) est alignée avec le trou de forage (12) ; la mise en place d'un organe tubulaire (18) dans le trou de forage (12) et l'ouverture (16a) de sorte qu'une extrémité élargie (28) de l'organe tubulaire aboute la plaque (16) ; et la dilatation mécanique de l'organe tubulaire de sorte qu'une paroi externe (24) de celui-ci s'engage à frottement dans la roche.

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