System for detecting interfaces between mineral seams and the su

Details System for detecting interfaces between mineral seams and the su System for detecting interfaces between mineral seams and the su

1979-06-11

1981-04-21

Pate, III, William F.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

175 41, 299 30, 250253, 250498, E21C 3524

Patent

active

042629640

ABSTRACT:
The present invention contemplates a system for detecting an interface between a mineral seam and the surrounding earth formation utilizing a radiation source and a radiation receiver mounted on a miner having a positionable cutter assembly. As the miner is moved into the coal seam, a first distance is continuously sensed between one surface formed in the mineral seam by the miner cutter assembly and the surrounding earth formation and the miner cutter assembly is positioned in response to the sensed first distance. As the miner is withdrawn from the coal seam, a second distance is continuously sensed between one surface formed in the mineral seam by the miner cutter assembly and the surrounding earth formation and the miner cutter assembly is positioned in response to the sensed second distance. A substantial portion of the space between the wall formed in the mineral seam by the miner cutter assembly and the radiation source and radiation receiver is substantially filled with a material having a density greater than the density of air to direct a substantial portion of the radiation through the mineral seam.

REFERENCES:
patent: 3177364 (1965-04-01), Green
patent: 3432667 (1969-03-01), Caldwell
patent: 3719394 (1973-03-01), Hartley
patent: 4014574 (1977-03-01), Todd
patent: 4082362 (1978-04-01), Justice
patent: 4160566 (1979-07-01), McGee
patent: 4165460 (1979-08-01), Frosch

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