E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) F16B 13/12 (2006.01)
Patent
CA 2240144
A mine roof support system which includes a steel anchor rod and a threaded fastener. The rod has a threaded end portion, and which is adapted for positioning in a bore hole so that the threaded end portion projects outwardly from a rock face. The threaded fastener includes a body having a pair of opposing end portions and a bore which extends along its central axis. Internal threads complimentary to those on the rod are formed along part of the axial length of the bore, whereby the relative rotation of the fastener and rod moves the rod axially through the bore. A cap member is detachably coupled to one end portion of the fastener covering part of the bore. When coupled, the cap member acts as a positive stop which limits relative movement of the rod axially through the fastener bore, and which when detached allows the fastener to run freely along the threaded portion of the rod.
Système de support de plafond de mine comprenant une tige d'ancrage en acier et une fixation filetée. La tige a une extrémité filetée, et elle est adaptée pour se placer dans un trou foré de manière que la partie filetée fait saillie à l'extérieur de la face du roc. La fixation filetée comprend un corps qui a deux bouts opposés et un trou s'étendant le long de son axe central. Des filets intérieurs complémentaires de ceux qui se trouvent sur la tige sont formés sur une partie de la longueur axiale du trou, ce qui fait que la rotation relative de la fixation et de la tige fait avancer la tige dans le trou. Un élément de coiffe est fixé de façon amovible à un bout de la partie du trou couvrant la fixation. Quand il est fixé, l'élément de coiffe agit comme butée positive qui limite le mouvement relatif de la tige axialement dans le trou de la fixation et, quand il est enlevé, il permet à la fixation de se déplacer librement le long de la partie filetée de la tige.
Mensour Peter
Steklasa Mark
Tremblay Richard
Mansour Milad
Riches Mckenzie & Herbert Llp
LandOfFree
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