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Water-jet-assisted Mechanized Oil Shale Mining Factory Tests.

Authors
Kogelmann-WJ; Thimons-ED; Virgona-JE; Weakly-LA
Source
Proc 1989 :303-315
Link
NIOSHTIC No.
10007708
Abstract
The U.S. Department of Energy's Grand Junction (CO) Projects Office is participating in a $1.5 million cooperative agreement with Alpine Equipment Corp./Astro International Corp. ("Alpine") of State College, Pennsylvania, to evaluate the water-jet-assisted (WJA) mechanical cutting of oil shale under actual mining conditions. Alpine has designed and manufactured a standard-sized roadheader (boom-type continuous miner) for WJA factory cutting tests. This WJA rock miner is being used for testing novel polycrystalline diamond composite (PDC) cutting tools and high-pressure-water components to be incorporated in a heavy-duty, high-production WJA mechanized mining machine. Field testing of the machine will be conducted in an underground oil shale mine located in the Piceance Basin of western Colorado. Additional support will be provided by the U.S. Bureau of Mines Pittsburgh Research Center and oil shale companies, through the Colorado Mining Association. The novel PDC bits (picks), especially the rotating "point-attack" bits with semiround "domed" PDC inserts, showed excellent impact resistance and outstanding wear characteristics when compared to standard tungsten carbide ("carbide") tools. Water jetting considerably reduced dust levels and increased tool life. However, the water jets could not penetrate oil shale, a dense dolomitic limestone with kerogen, even at high water pressure and low traversing speed (i.e., a slow cutter head rotation). No significant reduction of cutting forces through water-jet assist was observed. To control dust and cool the cutter bits for increased
Publication Date
19890101
Document Type
OP;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
OP 123-90
NIOSH Division
PRC;
Source Name
Proc. 1989 Eastern Oil Shale Symp. Univ. Kentucky, Center for Appl. Energy Res., 1989, PP. 303-315
State
CO; KY; PA;
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