Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1994-12-22
1997-07-15
Graysay, Tamara L.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
4052591, 4052596, E21D 2002
Patent
active
056476949
ABSTRACT:
The present invention pertains to a mining support for supporting rock within a mine. The support includes a cable and a threaded shaft fixedly attached to a first end of the cable. There is also an expansion anchor threadingly engaged about the threaded shaft for anchoring against the rock within a bore hole and means for bearing against the rock at the opening of the bore hole. The bearing means preferably includes a second collar having a threaded portion on which a hex nut is mounted and a contact plate for bearing against the rock. Preferably, there is a first collar for fixedly attaching the cable to the threaded shaft. Alternatively, the threaded shaft has a cavity for engaging with the cable. In a preferred embodiment, the mining support includes means for mixing resin in a resin cartridge. The mixing means is positioned about a portion of the cable. The mixing means preferably includes a helical wire strand that wraps about a portion of the cable. A bending restrictor can be disposed about the cable such that at least a portion of the cable is prevented from bending as it is inserted into the bore hole. The present invention is also a method of supporting rock within a mine. There is the first step of drilling a bore hole into the rock. Next, there is the step of placing a first end of a cable into the bore hole.
REFERENCES:
patent: 3077809 (1963-02-01), Harding et al.
patent: 3509726 (1970-05-01), White
patent: 4265571 (1981-05-01), Scott
patent: 4634318 (1987-01-01), Koumal
patent: 4704053 (1987-11-01), Hipkins et al.
patent: 4798501 (1989-01-01), Spies
patent: 5375946 (1994-12-01), Locotos
F.M. Locotos Equipment & Design Co.
Graysay Tamara L.
Lagman Frederick L.
Schwartz Ansel M.
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