Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1991-05-28
1993-03-09
Bagnell, David J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
198522, 299 64, 299 75, E21C 2922, E21C 3520
Patent
active
051921154
ABSTRACT:
A mobile mining machine for cutting a tunnel in rock has a wheel-like cutterhead assembly supported by a pitch boom assembly that causes movement of the cutterhead assembly in the vertical plane. A swing boom assembly supports the pitch boom assembly and is supported by the base frame of the mobile mining machine. The swing boom assembly causes movement of the cutterhead assembly and the pitch boom assembly in the horizontal plane. During mining, a fixed front support and a fixed rear support anchor the mobile mining machine in the tunnel with front and rear crawlers raised from the tunnel floor. During re-gripping, the front and rear crawlers are lowered to support the mobile mining machine and the fixed front support and fixed rear support remain in contact with the tunnel floor. During tramming, the front and rear supports are raised for transportation of the mobile mining machine on the crawler. A movable muck apron assembly having pivoting apron wings and an integral muck hopper is located on the front portion of the mobile mining machine.
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Hartman Thomas M.
Sugden David B.
Bagnell David J.
The Robbins Company
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