Support assemblies for mine workings

Details Support assemblies for mine workings Support assemblies for mine workings

1978-12-29

1981-05-12

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

403318, 403364, 405293, E21D 1544

Patent

active

042668913

ABSTRACT:
A support assembly for a mine working has a floor-sill structure for engaging on the floor of the working and a roof-engaging member or members braced by one or more props against the roof of the working. The floor-sill structure employs one or more slidable skids which can be selectively extended in length at the forward end by fitting an extension component of the same width thereto. The or each skid is recessed to receive rear projections of the associated extension component and securing means, such as spindles or shaped locking elements, are used to secure the extension component to the skid. When the extension component is removed, inserts are located in the recesses of the skid to fill the latter and these inserts can be likewise secured with the same securing means.

REFERENCES:
patent: 2483032 (1949-09-01), Baer
patent: 2991097 (1961-07-01), Vanwersch et al.
patent: 3891275 (1975-06-01), Spies
patent: 3961487 (1976-06-01), Blumenthal
patent: 4062194 (1977-12-01), Allen

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