Mineral mining installation

Details Mineral mining installation Mineral mining installation

1979-01-08

1980-10-14

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, E21D 2300

Patent

active

042278333

ABSTRACT:
A mineral mining installation comprises a longwall structure, such as a conveyor or a winning installation, and a roof support assembly constituted by a plurality of roof support units positioned side-by-side. At least some of the roof support units are provided with hydraulic bracing rams for bracing the longwall structure longitudinally. Each bracing ram is pivotally connected between the longwall structure and the floor sill of a respective roof support unit. Each ram is connected to its floor sill by connection means constituted by a bracket slidably mounted on that floor sill for movement towards, and away from, the longwall structure. Means are provided for securing each of the brackets to its floor sill in any one of a plurality of positions.

REFERENCES:
patent: 3949562 (1976-04-01), Blumenthal et al.
patent: 4028898 (1977-06-01), Blumenthal et al.
patent: 4045089 (1977-08-01), Hauschopp et al.
patent: 4073151 (1978-02-01), Harsma

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