Double ended ranging drum shearer and method of controlling work

Details Double ended ranging drum shearer and method of controlling work Double ended ranging drum shearer and method of controlling work

1987-09-18

1989-04-18

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 42, E21C 3508, E21C 3524

Patent

active

048221058

ABSTRACT:
A double ended ranging drum shearer is provided with a shearer body and a pair of drums disposed at front and rear end portions of the shearer body to be movable up- and down-wardly. The shearer is further equipped with detectors for respectively detecting the travelling position of the shearer body, detecting the inclination of the shearer body at the travelled position, and detecting the heights of drums at the travelled position. These detectors are operatively connected to a controlling device which is connected to a drum height adjusting device. The controlling device operates and stores the drum heights necessary for keeping constant the working height of a mining face in a pit in accordance with output signals generated from the abovementioned detectors, and the drum height adjusting device is operated in response to an output transmitted from the controlling device representing the thus operated and stored data.

REFERENCES:
patent: 3371964 (1968-03-01), Weber
patent: 4008921 (1977-02-01), Czauderna et al.
patent: 4130319 (1978-12-01), Gapper
patent: 4371209 (1983-02-01), Alford et al.
patent: 4634186 (1987-01-01), Pease
patent: 4715657 (1987-12-01), Sato et al.

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