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1. US20110052332 - Yielding bolt and assembly

Office
United States of America
Application Number 12873887
Application Date 01.09.2010
Publication Number 20110052332
Publication Date 03.03.2011
Grant Number 08721227
Grant Date 13.05.2014
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
Applicants Oldsen John G.
FCI Holdings Delaware, Inc.
Wu Yaokun
Lamothe Marc W.
Inventors Oldsen John G.
Wu Yaokun
Lamothe Marc W.
Agents The Webb Law Firm
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.