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1. WO2011028790 - YIELDING BOLT AND ASSEMBLY

Publication Number WO/2011/028790
Publication Date 10.03.2011
International Application No. PCT/US2010/047512
International Filing Date 01.09.2010
IPC
E21D 20/02 2006.01
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. [US]/[US] (AllExceptUS)
  • OLDSEN, John G. [US]/[US] (UsOnly)
  • WU, Yaokun [CA]/[CA] (UsOnly)
  • LAMOTHE, Marc W. [CA]/[CA] (UsOnly)
Inventors
  • OLDSEN, John G.
  • WU, Yaokun
  • LAMOTHE, Marc W.
Agents
  • ORKIN, Russell D.
Priority Data
61/238,84901.09.2009US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) YIELDING BOLT AND ASSEMBLY
(FR) BOULON ÉLASTIQUE 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.
(FR)
L'invention porte sur un boulon de toit de mine, qui comprend une tige allongée et une couche de revêtement polymère. La tige allongée comporte une première extrémité et une deuxième extrémité, avec une partie saillante qui s'étend radialement vers l'extérieur à partir de la tige allongée. La couche de revêtement polymère recouvre au moins une partie de la tige allongée entre les première et deuxième extrémités. La tige allongée est mobile par rapport à la couche de revêtement polymère dans une direction axiale. La tige allongée a une première position dans laquelle la tige allongée a une position axiale prédéterminée par rapport à la couche de revêtement polymère et une deuxième position dans laquelle la tige allongée a une position axiale décalée par rapport à la première position.
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