Control of respirable quartz dust on continuous mining sections.
Taylor-LD; Thakur-PC; Riester-JB
NTIS: PB 87-181855, 1986; :1-67
This report describes research by the Bureau of Mines and Conoco Inc. 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 longwall 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.
Mining-industry; Coal-mining; Underground-mining
CP; Final Contract Report
NTIS Accession No.
NTIS: PB 87-181855