Mine roof support system

Details Mine roof support system Mine roof support system

1983-08-25

1985-02-12

Husar, Cornelius J.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405288, E21D 2000, E21D 2100

Patent

active

044988168

ABSTRACT:
A mine roof-truss-bolt system and a novel clip for use in such systems are provided. The system includes opposed anchor members installed in the roof, a reinforcing member located in a passage below the roof and extending longitudinally to locations past the lower ends of the anchor members, and clips abutting the roof for connection with the anchor and reinforcing members. The system also includes apparatus for placing the anchor and reinforcing members in tension for additional support of the roof. The members are connected to the clips at locations of substantially the same elevation on the clip below the mine roof.

REFERENCES:
patent: 2371789 (1945-03-01), Batten
patent: 3427811 (1969-02-01), White
patent: 3505824 (1970-04-01), White
patent: 3509726 (1970-05-01), White
patent: 4274762 (1981-06-01), Johnson
patent: 4349300 (1982-09-01), Kelley
patent: 4395161 (1983-07-01), Wilson et al.
Article from "Coal Mining & Processing," Jun. 1969-pp. 64,65,83 entitled Roof Trusses on Trial at Crown Mine.
Article from "Society of Mining Engineers, AIME," Jun. 1970, vol. 247, pp. 109, 110, entitled In-situ Roof Trusses vs. Angle Roof Bolts-A Photoelastic Comparison by S. C. Gambrell and C. D. Haynes.

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