Mining or in situ disintegration of hard material – Processes – Forming blocks
Patent
1977-03-07
1978-05-16
Shapiro, Jacob
Mining or in situ disintegration of hard material
Processes
Forming blocks
299 11, E21F 506
Patent
active
040891810
ABSTRACT:
A canopy and shield structure for supporting a shield adjacent a working face in a seam-like mine deposit, comprises a floor skid which is connected through an extensible and retractable prop at the working face end to the working face, and of a canopy, which is adapted to be positioned in parallel relation to the roof strata. The working space is covered at the waste removal end by a shield which includes a lower portion pivotal on the floor skid, and an upper portion which is rigidly connected to the canopy at the opposite end of the canopy from the working face end. The shield is connectable to an extensible and retractable prop and a lemniscate guidance mechanism, so that the upper part of the shield may be moved upwardly and downwardly along its longitudinal axis. The upper part also carries an opening for the passage of a blast pipe which is supported on roller means carried by the canopy.
REFERENCES:
patent: 3903703 (1975-09-01), Lubojatsky
patent: 3916631 (1975-11-01), Agnew et al.
patent: 4027489 (1977-06-01), Walker et al.
Shapiro Jacob
Thyssen Industrie AG
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