Yieldable mine roof support fixture

Details Yieldable mine roof support fixture Yieldable mine roof support fixture

1980-11-05

1983-03-29

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

411 8, E21D 2102

Patent

active

043781802

ABSTRACT:
A yieldable mine roof support fixture in which a support member is anchored in a borehole in the geologic mass and is formed with a divergent tapering end adjacent the mine roof which cooperates with a support plate having an opening engaged with the tapering end and yieldable so as to allow the plate to slide or move along the tapering end for imposing resistance to movement of the geologic mass which varies from substantially constant to progressively increasing resistance.

REFERENCES:
patent: 1038834 (1912-09-01), Bloom
patent: 2725843 (1955-12-01), Koski
patent: 2850937 (1958-09-01), Ralston
patent: 2943528 (1960-04-01), Curry
patent: 2947279 (1960-08-01), Hohos et al.
patent: 3161174 (1964-12-01), Harrison
patent: 3226934 (1966-01-01), Emery
patent: 3478523 (1969-11-01), Reusser et al.
patent: 3693359 (1972-09-01), Karara
patent: 3797254 (1974-03-01), Askey et al.

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