1974-02-15
1976-01-20
Shapiro, Jacob
E21D 2304
Patent
active
039329984
ABSTRACT:
A mine roof support for use at a mineral face comprises at least one prop, a canopy or roof-engaging structure adapted to lie against the roof of a mine working, a base member adapted to lie on a floor of said mine working, and a shield flexibly connecting, by hinge means, said canopy or roof-engaging structure and said base member. Said hinge means have their axes lying in the longitudinal direction of the mineral face and the hinge means connecting the shield to the base member is constructed so as to provide additionally for movement of the shield laterally relatively to the base member. In one preferred construction the axis of said hinge, which as stated lies in the longitudinal direction of the mineral face, is itself pivotable about an axis lying in the advancing direction of the roof support. The hinge connecting the shield to the canopy or roof-engaging structure may be similarly constructed. The shield may be constructed and arranged so that it will transfer, at least in part, the support forces between the roof and floor.
REFERENCES:
patent: 3483705 (1969-12-01), Roberts
Lubojatsky Walter
Wertelewski Wilhelm
Becorit Grubenausbau GmbH
Shapiro Jacob
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