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1. AU2010289595 - Yielding bolt and assembly

Office
Australia
Application Number 2010289595
Application Date 01.09.2010
Publication Number 2010289595
Publication Date 04.08.2011
Publication Kind B2
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.
Inventors Lamothe, Marc W.
Oldsen, John G.
Wu, Yaokun
Agents Griffith Hack
Priority Data 61/238,849 01.09.2009 US
Title
(EN) Yielding bolt and assembly
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.