Mining or in situ disintegration of hard material – Processes – With material-handling
Patent
1995-07-10
1996-12-10
Tsay, Frank
Mining or in situ disintegration of hard material
Processes
With material-handling
299 57, E21C 2722, E21C 4100
Patent
active
055824668
ABSTRACT:
A mining machine uses front cutters (barrel cutters) to cut into an area to be mined defining a first profile, and then expands rear cutters on the sides to cut a second, larger, profile during out-cutting. Cutter chains and drums of the rear cutter initially move cut material (e.g., coal) forward, and then through openings in the side frame of the machine onto a first, lowest, conveyance surface over which an endless conveyor chain with flights moves. A second conveyance surface above the first conveyance surface is also traversed by the chain with the flights to move material from the front cutters. A reversible motor powers the chains so that cut material is moved over the second conveyance surface during in-cutting, and over the first conveyance surface during out-cutting. The rear cutters are a sufficient distance above the mined floor formed during in-cutting that cut material tends to move onto (rather than under) the first conveyance surface. Each barrel cutter may be powered by the same explosion-proof electric motor as a rear cutter, with a remote controlled clutch between the motor and rear cutter so that the rear cutter need not operate during in-cutting.
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Coaltex, Inc.
Tsay Frank
LandOfFree
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