Safety wall cutting through method employed in long wall mining

Details Safety wall cutting through method employed in long wall mining Safety wall cutting through method employed in long wall mining

1978-06-22

1980-04-08

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

299 12, 299 19, E21C 4102

Patent

active

041969332

ABSTRACT:
A safety wall treating method employed in the coal mining operation at the long wall face of a coal mine comprises shearing the long wall face leaving safety wall(s) at one or both side(s) of the face but shearing through the safety wall(s) at regular intervals to form intake or exhaust openings communicating with intake or exhaust tunnels.

REFERENCES:
patent: 3999804 (1976-12-01), Simpson

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