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Details

Control of Respirable Quartz Dust on Continuous Mining Sections.

PB87181855

Publication Date	1986
Personal Author	Taylor, L. D.; Thakur, P. C.; Riester, J. B.
Page Count	68
Abstract	The report describes research to identify the sources and distribution of quartz dust in underground coal mines and to evaluate various types of bits. The study found that the main source of respirable quartz dust was the continuous miner when cutting rock material. Other activities in the section, such as roof bolting operations, normally did not contribute significant amounts of quartz dust. One forward attack and nine conical bits were tested in the laboratory to determine the amount of dust generated and the energy requirement for each bit. The laboratory tests indicated that slender bits with narrow tip angles generated less dust with less energy than larger bits with wide tip angles. The forward attack longwall bit also performed better than most of the other test bits. Tests conducted underground found that the smaller bits and the longwqll bits were prone to wear, resulting in higher dust levels. The larger conical bits were not affected to the same degree. Underground power consumption measurements did not distinguish between the power required by different bits.
Keywords	Dust control Quartz Mining research Drill bits Coal mining Underground mining Mine surveys Continuous miners Mining equipment
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 94J - Nondestructive Testing 94F - Tooling, Machinery, & Tools
Corporate Authors	Conoco, Inc., Morgantown, WV.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. Sep 83-Dec 86.
NTIS Issue Number	198714
Contract Number	J0338077

Control of Respirable Quartz Dust on Continuous Mining Sections.

Control of Respirable Quartz Dust on Continuous Mining Sections.
PB87181855

Publication Date	1986
Personal Author	Taylor, L. D.; Thakur, P. C.; Riester, J. B.
Page Count	68
Abstract	The report describes research to identify the sources and distribution of quartz dust in underground coal mines and to evaluate various types of bits. The study found that the main source of respirable quartz dust was the continuous miner when cutting rock material. Other activities in the section, such as roof bolting operations, normally did not contribute significant amounts of quartz dust. One forward attack and nine conical bits were tested in the laboratory to determine the amount of dust generated and the energy requirement for each bit. The laboratory tests indicated that slender bits with narrow tip angles generated less dust with less energy than larger bits with wide tip angles. The forward attack longwall bit also performed better than most of the other test bits. Tests conducted underground found that the smaller bits and the longwqll bits were prone to wear, resulting in higher dust levels. The larger conical bits were not affected to the same degree. Underground power consumption measurements did not distinguish between the power required by different bits.
Keywords	Dust control Quartz Mining research Drill bits Coal mining Underground mining Mine surveys Continuous miners Mining equipment
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 94J - Nondestructive Testing 94F - Tooling, Machinery, & Tools
Corporate Authors	Conoco, Inc., Morgantown, WV.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. Sep 83-Dec 86.
NTIS Issue Number	198714
Contract Number	J0338077