Methods and apparatus for maintaining longwall face alignment
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 4, 1991
Issued Date -
N/A
app pub date -
Feb 26, 1990
filing date -
Oct 31, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Mine panel alignment is controlled by recording the electromagnetic phase modulation and/or signal attenuation between spaced distant transceivers in the panel and a transceiver on a cutting machine to measure the distance between the transceivers. Through trilateration, the position of the cutting machine with respect to the known fixed locations can be determined and adjustments made to the cutting machine functions to maintain desired panel alignment.
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Cited Art Landscape
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