Coal mining method at a long-walled pit face of the coal mine

Details Coal mining method at a long-walled pit face of the coal mine Coal mining method at a long-walled pit face of the coal mine

1977-02-02

1978-11-28

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

299 31, 299 33, E21C 4100, E21C 3514

Patent

active

041273036

ABSTRACT:
A coal mining method at a long-walled pit face of a coal mine comprises combining self-advancing supports with a conveyor which is arranged along the long-walled pit face and on which a shearer is mounted, and arranging the effective shearing depth of shearing drums of the shearer to be at least half as long as the stroke of a shifter for shifting both of the self-advancing supports and the conveyor toward the pit face, whereby each of the self-advancing supports is progressively shifted toward the pit face every time that the whole area of the pit face is sheared at least twice by the shearer.

REFERENCES:
patent: 3677603 (1972-07-01), Small
patent: 3896626 (1975-07-01), Spies et al.

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