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1. CA2749598 - YIELDING BOLT AND ASSEMBLY

Office
Canada
Application Number 2749598
Application Date 01.09.2010
Publication Number 2749598
Publication Date 10.03.2011
Grant Number
Grant Date 14.04.2015
Publication Kind C
IPC
E21D 20/02
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
20Setting anchoring-bolts
02with provisions for grouting
CPC
E21D 21/0006
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
21Anchoring-bolts for roof, floor ; in galleries or longwall working; , or shaft-lining protection
0006characterised by the bolt material
E21D 21/0033
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
21Anchoring-bolts for roof, floor ; in galleries or longwall working; , or shaft-lining protection
0026characterised by constructional features of the bolts
0033having a jacket or outer tube
E21D 21/004
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
21Anchoring-bolts for roof, floor ; in galleries or longwall working; , or shaft-lining protection
0026characterised by constructional features of the bolts
004Bolts held in the borehole by friction all along their length, without additional fixing means
E21D 21/0046
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
21Anchoring-bolts for roof, floor ; in galleries or longwall working; , or shaft-lining protection
0026characterised by constructional features of the bolts
0046formed by a plurality of elements arranged longitudinally
E21D 21/02
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
21Anchoring-bolts for roof, floor ; in galleries or longwall working; , or shaft-lining protection
02having means for indicating tension
Applicants FCI HOLDINGS DELAWARE, INC.
Priority Data 61/238,849 01.09.2009 US
Title
(EN) YIELDING BOLT AND ASSEMBLY
(FR) BOULON ELASTIQUE ET ENSEMBLE
Abstract
(EN)

A mine roof bolt includes an elongated rod and a polymer coating layer. The
elongated rod has a first end and a second end with a protruding portion
extending radially
outward from the elongated rod. The polymer coating layer covers at least a
portion of the
elongated rod between the first and second ends. The elongated rod is movable
relative to
the polymer coating layer in an axial direction. The elongated rod has a first
position where
the elongated rod has a predetermined axial position relative to the polymer
coating layer
and a second position where the elongated rod has a displaced axial position
relative to the
first position.