Prestressed rock truss

Details Prestressed rock truss Prestressed rock truss

1979-02-26

1981-06-23

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405288, E21D 2000

Patent

active

042747627

ABSTRACT:
A roof support system for mines in which prestressed rock trusses are bolted to the roof of the mine with roof bolts which each extend beyond the width of the mine gallery and the method of installing said trusses into position.

REFERENCES:
patent: 2371789 (1945-03-01), Batten
patent: 3427811 (1969-02-01), White
patent: 4091628 (1978-05-01), Kelley

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