Explosive fluid transmitted shock method for mining deeply burie

Details Explosive fluid transmitted shock method for mining deeply burie Explosive fluid transmitted shock method for mining deeply burie

1975-01-28

1976-06-22

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Explosive

102 23, 166299, 299 18, E21C 3712

Patent

active

039647927

ABSTRACT:
A method for recovering coal from deeply buried deposits comprising drilling a hole down into a coal seam, filling the hole with water, and periodically detonating an explosive charge at the bottom of the water-filled hole. The water transmits the explosive shock wave to the face of the coal seam, thereby fracturing and dislodging the coal. The resulting suspension of loose coal in water is then pumped to the surface where the coal is recovered and the water is recycled to the mining operation.

REFERENCES:
patent: 2676662 (1954-04-01), Ritzmann
patent: 3083778 (1963-04-01), Friedman et al.
patent: 3393013 (1968-07-01), Hammer et al.
patent: 3874733 (1975-04-01), Poundstone et al.

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