Gob canopy for a mine roof support

Details Gob canopy for a mine roof support Gob canopy for a mine roof support

1981-10-19

1984-11-06

Husar, Cornelius J.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405297, 405295, 299 33, E21D 1514, E21D 1552, E21D 1702

Patent

active

044809468

ABSTRACT:
A support for the roof in longwall mining operations includes a gob canopy at the rear of a roof canopy. The gob canopy can move about a vertical pivot and a horizontal pivot by operation of a hydraulic actuator. To stabilize the support, the gob canopy moves into or out of contact with the roof at the rear of the roof canopy. The actuators can move the gob canopy to the left or right side of the roof canopy about a vertical pivot so that a skeg member on the upper surface of the gob canopy drags along the mine roof for steering the roof support when it is advanced toward the mine face. Gaps between the gob canopies of side-by-side roof supports function in the manner of grizzly bars to permit recovery of small pieces of gob roof rock.

REFERENCES:
patent: 3240021 (1966-03-01), Meriaux et al.
patent: 3570255 (1971-03-01), Shuttleworth
patent: 3872678 (1975-03-01), Shuttleworth
patent: 4065929 (1978-01-01), Simpson

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