Title: Arrangement for supporting roofs of underground excavations

Abstract: A mine roof support for underground excavations includes a support adapted to engage the floor of the underground excavation, and a movable roof shield which engages the roof of the underground excavation. A movable rear shield is mounted on the support and is pivotally connected with the roof shield for relative movement thereto about a pivot axis. A pit prop arrangement is provided intermediate the shields and the support for moving the shields relative to each other about the pivot axis between a plurality of inclined positions in which the rear shield is inclined at different angles of inclination relative to the roof shield. A pair of abutment members are respectively provided on the shields for limiting relative movement of the latter beyond a predetermined one of the inclined positions in which the shields are inclined at a predetermined angle of inclination relative to each other.

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Inventors: Neu, Gustav (Bochum, DT)

Application Number: 783338
Filing Date: 1977-03-31
Publication_date: 1978-03-28
Assignee: Bochumer Eisenhutte Heintzmann GmbH & Co. (Bochum, DT)
Primary Class(es): 405/296
Other Classes:
US Patent Ref:

3885396	May, 1975	Snowden et al.	61/45.
3921409	Nov, 1975	Blumenthal	61/45.
3971225	Jul, 1976	Wertelewski et al.	61/45.
3983710	Oct, 1976	Heine	61/45.

Other Refs:
Primary Examiner: Taylor, Dennis L.
Assistant Examiner:
Attorney: Striker; Michael J.