Apparatus for the mining of mineral matter, especially coal

Details Apparatus for the mining of mineral matter, especially coal Apparatus for the mining of mineral matter, especially coal

1991-03-07

1992-05-05

Bagnell, David J.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 32, 405302, E21D 2314

Patent

active

051101874

ABSTRACT:
A mining apparatus of the type in which a mining machine excavates a mining face, especially a coal face in a subterranean mining application, and has a plurality of emitters of electromagnetic waves of different character diverging toward receivers on the individual walking props. The walking props are provided with a control unit which, in response to leading and trailing zones of the respective magnetic beams and/or an overlap region of the two beams, causes the advance of the walking prop as the mining machine travels past it to follow the excavation of the mining face.

REFERENCES:
patent: 4330154 (1982-05-01), Harris
patent: 5029943 (1991-07-01), Merriman

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