Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Ore/rock interface determination during cutting
Patent
1994-12-23
1996-03-05
Bagnell, David J.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Ore/rock interface determination during cutting
E21C 3900, E21F 500
Patent
active
054960932
ABSTRACT:
A continuous miner has a pivotal boom mounting a rotor carrying picks for attaching and dislodging mineral deposit in a mineral deposit seam within host rock. A thin layer of mineral deposit is left respectively against a roof and against a floor. Ultrasonic sound waves are generated and are transmitted via a jet of water directed against the roof. Reflections are transmitted back via the jet of water to a receiver. Layers of the mineral deposit and the host rock are identified in respect of presence and location, by means of logic which generates a control signal to restrict pivoting of the boom to prevent cutting into the host rock by the rotor.
REFERENCES:
patent: 3371964 (1968-03-01), Weber
patent: 3961307 (1976-06-01), Hochheimer et al.
Bagnell David J.
Csir & Sasol Mining Proprietary Ltd.
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