Mine roof support assembly

Details Mine roof support assembly Mine roof support assembly

1990-10-29

1992-03-31

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405299, E21D 2304

Patent

active

051002639

ABSTRACT:
A mine roof support includes a ground engaging base section, a roof engageable canopy, and hydraulic props for raising and lowering the canopy relative to the base section. An advancing mechanism is provided for advancing the roof support towards the mine face, and a base lifting mechanism is provided for raising one end of the roof support prior to advancing the support towards the mine face. The base lifting mechanism includes a lifting ram mounted with respect to the base section for slidable movement between an upper operative position in which the ram can be extended to lift the one end of the roof support clear of the ground and a lower position in which the canopy can assume a position relative to the base section lower than would be possible with the lifting ram in its upper operative position.

REFERENCES:
patent: 3811288 (1974-05-01), Wehner et al.
patent: 4311417 (1982-01-01), Bower et al.
patent: 4600340 (1986-07-01), Rosenberg

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