Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of material handling means
Patent
1991-04-15
1992-09-22
Bagnell, David J.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of material handling means
299 18, 209589, F21C 3520, B07C 5346
Patent
active
051491753
ABSTRACT:
A method of split load mining a coal seam having a thickness less than that conventionally considered economical to mine is economically mined utilizing a cutting head having a diameter equal to the coal seam thickness. Coal in the coal seam is cut and conveyed from the mine bore to the mine mouth, and periodically the overburden is out to enlarge the bore, thereby generating non-coal (e.g. rock) cut material. The cut coal and rock are continously automatically conveyed in a common path in separate masses away from the bore mouth while the ash content or the material is automatically analyzed to determine whether conveyed material at a first location is primarily coal (e.g. less than about 50-60% ash) or primarily rock. In response to the automatic analyzing, the material is automatically diverted to a second location if coal, and to a third location if rock. An angled conveyor belt is utilized to convey the coal and rock for analysis and sorting, and the analyzer preferably is a radioisotope gauge. A diverter at the end of the conveyor belt is preferably an inverted Y-shaped conduit with a diverter vane within it. A vertical barrier below the conduit stem defines the second and third locations.
REFERENCES:
patent: 3237765 (1966-03-01), Gaudin et al.
patent: 3834761 (1974-09-01), Ray et al.
patent: 4174135 (1979-11-01), Grenia
patent: 4953915 (1990-09-01), Jasser
Amvest Corporation
Bagnell David J.
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