Apparatus for mining coal using vertical bore hole and fluid

Details Apparatus for mining coal using vertical bore hole and fluid Apparatus for mining coal using vertical bore hole and fluid

1974-08-26

1976-11-23

Purser, Ernest R.

Boring or penetrating the earth

With above-ground means for preparing or separating drilling...

175209, 175213, E21B 2100

Patent

active

039931463

ABSTRACT:
Coal can be mined from a substantially vertical or steeply inclined seam by forming a cavity in the seam and filling the cavity with a magnetite slurry having a specific gravity greater than the coal being mined therefrom.
As the coal is dislodged, it will float to the top and be pumped from the cavity by the excess magnetite slurry being supplied to the cavity. A coal-magnetite slurry separator is used to separate the coal from the magnetite slurry, whereupon the magnetite slurry is reinjected into the cavity.

REFERENCES:
patent: 2941783 (1960-06-01), Stinson
patent: 3599733 (1971-08-01), Varley

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