Mine roof support plate

Details Mine roof support plate Mine roof support plate

1976-09-30

1978-09-12

Shapiro, Jacob

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

85 50R, 405259, E21D 2100, F16B 2900

Patent

active

041126939

ABSTRACT:
A mine roof support plate having a rigid sheet steel body of uniform thickness wherein a ribbed domed section reinforces the plate against distortion. The domed section is of generally frusto-conical configuration and defines a central section having an opening therein surrounded by a generally planar surface. The periphery of the plate is of planar rectangular configuration and disposed in spaced parallel relationship to the central section. Reinforcing ribs are formed in and extend radially across the domed section to merging intersection with the planar periphery of the plate.

REFERENCES:
patent: 2748594 (1956-06-01), Edwards
patent: 4037418 (1977-07-01), Hannan

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