| 摘要 |
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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