Shield-type support assemblies for mine workings

Details Shield-type support assemblies for mine workings Shield-type support assemblies for mine workings

1976-10-22

1978-02-28

Taylor, Dennis L.

E21D 1544

Patent

active

040758575

ABSTRACT:
A shield-type support assembly for a mine working is composed of three substantially identical frames aligned side-by-side. Each frame has a floor sill structure which carries props capable of bracing a roof cap and the floor sill structure between the roof and floor of a mine working. A goaf shield is provided for each frame and these shields combine to screen off the goaf zone. The outer frames on the one hand and the central frame on the other are shiftable in alternation with the aid of shifting rams. One or more transverse arms extend across the forward regions of the frames and the or each arm is carried by the central frame floor sill structure. Guide devices are connected to the arm or arms and serve to guide the frames when shifted by the rams and the rams themselves transmit the shifting or reaction forces to the arm or arms.
The coupling between the floor sill structures of the frames permits relative vertical mobility therebetween to cope with variations in the floor level of the working.

REFERENCES:
patent: 3333426 (1967-08-01), Jackson
patent: 3397544 (1968-08-01), Golla et al.
patent: 3505823 (1970-04-01), Bell

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