Roof bolt with plastic sleeve and mechanical anchor

Details Roof bolt with plastic sleeve and mechanical anchor Roof bolt with plastic sleeve and mechanical anchor

E - Fixed Constructions

21

D

61/46

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

Patent

CA 2039787

ROOF BOLT WITH PLASTIC SLEEVE AND MECHANICAL ANCHOR ABSTRACT OF THE DISCLOSURE A mine roof anchor assembly usable with a quick-setting resin cartridge inserted into a mine roof opening is disclosed and includes a partially threaded elongated bolt having a first end, a mechanical anchor, such as a bail-type or mechanical expansion type, at a threaded end, and a mixing element, such as a coil, having an upper end attached to the bolt and positioned external of and surrounding a length along the bolt. The bolt receives a frangible hollow plastic sleeve which is positioned about the threaded portion and extends below the mechanical anchor toward the bolt head. A stopping element attaches to the bolt below the mechanical anchor toward the first end, whereby the frangible sleeve is sandwiched between the stopping element and the mechanical anchor. A shaft can also be coupled to the first end extending the length of the anchor assembly.

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