1977-03-31
1978-01-03
Taylor, Dennis L.
E21D 1544
Patent
active
040659305
ABSTRACT:
A mine roof support for an underground mine gallery includes a sole plate resting on the floor of the mine gallery, a roof shield pressed against the roof of the mine gallery by a plurality of hydraulically operated props, and means for maintaining the position of the props relative to the sole plate and the roof shield.
REFERENCES:
patent: 3928981 (1975-12-01), Parker et al.
Bochumer Eisenhutte Heintzmann GmbH & Co.
Striker Michael J.
Taylor Dennis L.
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