Mine roof system

Details Mine roof system Mine roof system

1989-09-15

1991-05-28

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405259, E21D 2100

Patent

active

050189077

ABSTRACT:
Apparatus (1) for supporting a mine roof (R) has connected plates (7, 9) positioned against the roof at opposite sides of the mine roof. One plate (7) has an upset surface (13) contacting the roof to exert a compressive load on it. Bolts (53) anchor the plates to the roof. A tie rod (64) interconnects the plates and is adjustable to vary the compressive load, and in one embodiment a slip anchor (67) is provided at one end of the tie rod which can also be utilized to estimate the tie rod load. In another embodiment a single quick connect pin (227) is provided between connected plates (207, 209).

REFERENCES:
patent: 4596496 (1986-06-01), Tyrell et al.
patent: 4630974 (1986-12-01), Sherman
patent: 4666344 (1987-05-01), Seegmiller
patent: 4749310 (1988-01-01), White

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