Roof sensing control of shearer in longwall mining

Details Roof sensing control of shearer in longwall mining Roof sensing control of shearer in longwall mining

1981-03-20

1982-09-28

Purser, Ernest R.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

33263, E21C 3508

Patent

active

043515657

ABSTRACT:
The present invention is directed to a method for regulating position of a mining apparatus comprising the steps of transmission of a plurality of signals from a position detection device, interception of said signals at an edge of a mine at a distance away from the position detection device, and adjustment of the position of the mining apparatus to form an intersection between at least two signals at the edge of the mine.

REFERENCES:
patent: 1349336 (1920-08-01), Haddock
patent: 2316751 (1943-04-01), Adler
patent: 2532104 (1950-11-01), King
patent: 3371964 (1968-03-01), Weber
patent: 3693143 (1972-09-01), Kennedy
patent: 4072349 (1978-02-01), Hartley

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