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Application of a Hydraulic Borehole Mining Apparatus to the Remote Extraction of Coal. Interim Report.

Authors
Cheung-JB; Hurlburt-GH; Scott-LE; Veenhuizen-S
Source
For Reference Only At Bureau Libraries :87 pages
Link
NIOSHTIC No.
10002182
Abstract
This report presents the results of a program to demonstrate the technical feasibility of hydraulic borehole coal mining. The hydraulic borehole method of coal mining involves inserting a hydraulic mining device into a borehole that has been drilled from the surface into the underground coalbed. The borehole mining device issues a jet of water under high pressure, which breaks the coal. The pieces of coal and water form a slurry that flows to the base of the borehole where it is pumped to the surface. Phase I of the program encompassed the design, fabrication, and factory-testing of a hydraulic borehole mining device. The program was successfully completed at the Wilkeson-Carbonado coalfield near Wilkeson, Washington. The technical feasibility of hydraulic borehole coal mining was demonstrated by mining 32 tons of coal at a depth of about 75 feet over a period of 4 hours.
Publication Date
19760101
Document Type
CP; Final Contract Report;
Fiscal Year
1976
NTIS Accession No.
NTIS Price
Identifying No.
OFR 117-81
NIOSH Division
TCRC;
Source Name
For Reference Only At Bureau Libraries
State
WA;
Performing Organization
Flow Industries, Inc.
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