Roof support structure for excavations

Details Roof support structure for excavations Roof support structure for excavations

1975-10-28

1976-10-05

Taylor, Dennis L.

Supports

Pipe or cable

Extending through plate

248357, E21D 1544

Patent

active

039837092

ABSTRACT:
A roof support structure for excavations comprises a supporting sill beam which is adapted to be anchored in a position below the roof in the shaft or excavation being worked. The sill beam includes a front curved working face forming a closed cover plate and a movable front structure is pivoted on the sill beam at the center of curvature of the cover plate and it has a closed front end plate which is telescopic over the cover plate during pivotal movement. A cave-in shield is pivotaly connected to the outer end of the front structure adjacent the front plate and its opposite end is directed toward the roof and a roof cap structure is pivotally mounted on this end and is positioned against the roof by adjustable hydraulic props which engage against the cave in shield and pivot it to a desired position.

REFERENCES:
patent: 3830070 (1974-08-01), Rosenberg et al.

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