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Effect of Symmetric Bit Wear and Attack Angle on Airborne Respirable Dust and Energy Consumption.

Authors
Hanson-BD; Roepke-WW
Source
NTIS: PB 80-134372 :24 pages
Link
NIOSHTIC No.
10000089
Abstract
The Bureau of Mines conducted a series of experiments using four different coal types to determine the effect of attack angle and symmetric bit wear on airborne respirable dust (ard) generated by point-attack bits and in energy consumption. Neither had a significant effect on ard at the 95-pct confidence level, but bit wear had a significant effect (95 pct confidence) on specific energy (energy per gram of cut coal) for three coal types. Depth of cut was the most significant factor affecting ard and specific energy.
Publication Date
19790101
Document Type
IH; Report of Investigations
Fiscal Year
1979
NTIS Accession No.
PB80-134372
NTIS Price
A03
Identifying No.
RI-8395
NIOSH Division
TCRC;
Source Name
NTIS: PB 80-134372
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