Method and apparatus for anchoring rock bolts and cables

Details Method and apparatus for anchoring rock bolts and cables Method and apparatus for anchoring rock bolts and cables

1985-05-31

1987-10-06

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Chemical

366 10, 405269, E21D 2002

Patent

active

046979603

ABSTRACT:
A method and apparatus for anchoring rock bolts and cables in drill holes is disclosed. The method of the invention comprises mixing a dry aggregate-cement mixture with a limited, predetermined amount of water in a water fitting and blowing the wetted cementitious mixture through a delivery tube into a drill hole, in which an anchor cable or rock bolt has been inserted, resulting in the cable or bolt becoming permanently anchored in the drill hole. The use of a wetted dry cementitious mixture eliminates leakage of mixture from the drill hole and obviates the use of a plug, cover or collar plate.
The equipement includes a pressurized, dry mix delivery vessel, a source of pressurized air, a water fitting for wetting dry mix with water and a delivery tube for delivery of the wetted dry mix into the drill hole.

REFERENCES:
patent: 3227426 (1966-01-01), Williams
patent: 3363422 (1968-01-01), Turzillo
patent: 3371494 (1968-03-01), Lagerstrom
patent: 3604213 (1971-09-01), Parsons
patent: 4116368 (1978-09-01), Smith
patent: 4126009 (1978-09-01), Tomic
patent: 4179861 (1979-12-01), Brown
patent: 4326560 (1982-04-01), Drudy
patent: 4390281 (1983-06-01), Scriminger
patent: 4498817 (1985-02-01), Oulsnam
Concrete Manual, U.S. Department of the Interior, Eighth Edition, 1981, 12 pages.

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