Apparatus for loosening and/or breaking coal deposits, rocks, gr

Details Apparatus for loosening and/or breaking coal deposits, rocks, gr Apparatus for loosening and/or breaking coal deposits, rocks, gr

1984-12-21

1986-12-02

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

102330, E21C 3714

Patent

active

046260315

ABSTRACT:
An apparatus for breaking coal or other mineral matter from a bed thereof which comprises a string filling a bore hole which can rise steeply in this bed. The string consists of alternating breaking units and connecting pipes each braking unit having a differential piston displaced solely by the action of air pressure so that breaking slots are unblocked to discharge compressed air built up in the string. The pistons are provided with check valves to permit filling of the string.

REFERENCES:
patent: 3098442 (1963-07-01), Wakefield et al.
patent: 4108272 (1978-08-01), Paitson et al.
patent: 4301731 (1981-11-01), Fitzgerald

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