Advance mechanism for a mine roof support unit

Details Advance mechanism for a mine roof support unit Advance mechanism for a mine roof support unit

1978-09-25

1980-02-05

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

E21D 1544

Patent

active

041870425

ABSTRACT:
The invention relates to an advance mechanism for a roof support unit to be used in a longwall face of a mineral mining working. The advance mechanism comprises a hydraulic advance ram and guide means constituted by a guide rod means and a guide rail. One end of the guide rod means is attached to a conveyor extending along the longwall face, the other end of the guide rod means being attached to a guide element. The guide rail extends slidably through a guide aperture in the guide element and is pivotally attached to the floor sill of the roof support unit for pivotal movement in a vertical plane perpendicular to the longwall face. The hydraulic advance ram is attached to the guide element and acts on a member fixed to the floor sill.

REFERENCES:
patent: 3482878 (1969-12-01), Floter
patent: 3911686 (1975-10-01), Becker et al.
patent: 3915500 (1975-10-01), Schlusener et al.

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