Mine roof support

Details Mine roof support Mine roof support

1975-09-02

1977-03-08

Shapiro, Jacob

Mining or in situ disintegration of hard material

Processes

Forming blocks

299 31, E21D 1710

Patent

active

040106187

ABSTRACT:
This invention concerns a mine roof support of the kind comprising a floor beam, a roof engaging canopy and a plurality of extendible struts such as hydraulic jacks supporting the canopy from the floor beam. The invention comprises the provision of a flap pivotally connected along one edge of the canopy such that outward pivotal movement thereof may cause it to engage the canopy of an adjacent support. Hydraulic jack or equivalent means are provided acting between the canopy and the flap to urge the flap outwardly. The flap provides effective sealing of the gap between adjacent canopies in a line of roof supports and also enables each canopy to be positioned accurately between adjacent supports during advancing movement of the support.

REFERENCES:
patent: 3524321 (1970-08-01), Wilkenloh et al.
patent: 3728863 (1971-09-01), Hidasi
patent: 3830070 (1974-08-01), Rosenberg et al.
patent: 3903703 (1975-09-01), Lubojatsky
patent: 3928981 (1975-12-01), Parker et al.

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