Mine roof support

Details Mine roof support Mine roof support

1978-10-31

1980-09-16

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

91358A, 405291, E21D 1544

Patent

active

042226864

ABSTRACT:
In a mine roof support in which a roof shield, pressed by hydraulically operated, collapsable and extensible props, arranged between the roof shield and a sole plate, against the roof of a mine gallery, is connected at its rear end to a rear shield, which in turn is connected by links to the rear end of the sole plate and in which a hydraulically operated cylinder-and-piston unit is interconnected between the roof shield and the rear shield for controlling the included angle between these shields, an arrangement for stopping further feeding of pressure fluid into the props when the inclined angle between the shield reaches a predetermined minimum or maximum angle.

REFERENCES:
patent: 887530 (1908-05-01), Scott et al.
patent: 3282283 (1966-11-01), Takeda
patent: 3420393 (1969-01-01), Omon
patent: 3902325 (1975-09-01), Sigott et al.
patent: 4077223 (1978-03-01), Koppers et al.

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