Rock-bolt stabilizer device for mining and tunneling application

Details Rock-bolt stabilizer device for mining and tunneling application Rock-bolt stabilizer device for mining and tunneling application

1985-04-25

1987-03-10

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405261, 411 8, E21D 2102

Patent

active

046487530

ABSTRACT:
A rock bolt stabilizer device which can be arranged in boreholes for stabilizing rock and similar host environments in mining and tunneling. The device is adapted to perform the function of a rigid profile anchor under predetermined stress conditions, and is also adapted to perform the function of an expansion anchor under given stress conditions. The device generally comprises an anchor member with mix end which can be secured near the base of the respective borehole by means of a cementitious composition. For tensioning, the other end of the anchor member can carry a bearing plate, a spacer, and a fastener for tensioning. The device also includes a sleeve which performs the function of a rigid anchor, and the sleeve substantially surrounds the anchor member. An increased armoring and anchoring efficiency is achieved with the device.

REFERENCES:
patent: 3379016 (1968-04-01), Williams
patent: 3650112 (1972-03-01), Howlett et al.
patent: 4056036 (1977-11-01), Kamann et al.
patent: 4124983 (1978-11-01), Weatherby
Preface to 2nd English Edition of "Anchoring in Rock and Soil", (Author: Leos Hobst).
Excerpts from "Rock Bolting: A Practical Handbook", (Norwegian Institute of Rock Blasting Techniques).
Excerpts from "Tunnel Engineering Handbook", (Van Nostrand Reinhold Company Inc.).

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