Mining or in situ disintegration of hard material – Processes – Breaking down by direct contact with fluid
Patent
1975-10-06
1978-05-30
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Processes
Breaking down by direct contact with fluid
299 7, 299 13, 299 18, E21B 4326, E21B 4328, E21C 4104
Patent
active
040920453
ABSTRACT:
A subterranean hydraulic mining system for mining soft sedimentary deposits, such as coal, in which a shaft is sunk through spoil layers, such as sand, dirt, clay, sedimentary deposits, slate, etc., to the sedimentary deposits, such as a coal vein. A second shaft is drilled from the surface to the coal vein in proximity to the first shaft and a small shaped charge is placed down the first shaft and directed toward the termination of the second shaft. A pipeline containing a directive nozzle is then directed down the first shaft with the nozzle oriented toward the second shaft and water and air pumped therethrough. A line is dropped through the second shaft terminating in a hydraulic elevator with water pumped down the shaft and up through the hydraulic elevator. As water is forced through a soft sedimentary deposit from the first shaft to the terminating elevator of the second shaft, it will carry a coal slurry with it which will rise up through the second shaft into a collecting tank where the coal is separated from the water and the water returned to the first and second shafts.
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