Mine roof support and attachment means therefor

Details Mine roof support and attachment means therefor Mine roof support and attachment means therefor

1984-10-22

1986-08-12

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405299, E21D 1544, E21D 2308

Patent

active

046053417

ABSTRACT:
Attachment means are provided for attaching a mine roof support to an abutment, (e.g. a flexible conveyor) the attachment means comprising a ram arrangement in the form of at least two rams 25, 26 operable to effect relative movement between the mine roof support and the abutment. The provision of two or more rams instead of the conventional single ram means that smaller bore rams may be used, for example a 60 mm bore as opposed to 41/4 inch bore and this makes it possible to cover or encase the rams in a protective shield without reducing the vertical space available to a miner underneath the mine roof support.

REFERENCES:
patent: 2694293 (1954-11-01), Perrin et al.
patent: 3197966 (1965-08-01), Arnott
patent: 3332246 (1967-07-01), Creuels et al.
patent: 3748861 (1973-07-01), Groetschel
patent: 4309130 (1982-01-01), Bemmerl
patent: 4380410 (1983-04-01), Bull et al.

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