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Effects of water on coal cutting forces and primary dust distribution.

Authors
Roepke-WW; Myren-TA
Source
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 8993, 1985 Jan; :1-14
Link
NIOSHTIC No.
10004804
Abstract
Research to evaluate the lubricity effects achieved by spraying water on the cutting bit of a mining machine or spraying water on the coal during cutting has shown that neither practice affects cutting forces, as had been believed. However, when water was supplied to the cutting zone axially through the bit at 3,000 to 5,000 psi pressure, tangential cutting forces were reduced an average of 30 pct at a 1-in depth of cut while normal bit forces were reduced an average of 65 pct. Lower normal forces mean reduced bit wear, faster advance with greater depth of cut, and fewer coal fines.
Keywords
Mining-industry; Underground-mining; Coal-mining; Coal-dust; Engineering-controls; Control-technology; Mining-equipment; Dust-suppression; Dust-control; Dust-control-equipment
Publication Date
19850101
Document Type
IH; Report of Investigations
Fiscal Year
1985
NTIS Accession No.
NTIS Price
Identifying No.
RI-8993
NIOSH Division
TCRC
Source Name
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 8993
State
MN
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