Mine Dust

mine dust

[′mīn ‚dəst]
(mining engineering)
Dust from drilling, blasting, or handling rock.

Dust, Mine

 

mineral particles of a useful mineral and/or gangue that are suspended in a mine atmosphere or that have settled in mining excavations. A principal characteristic of the dust is particle size. On particle size depend the rate of reaction with oxygen, adsorbability and electrical properties of the dust, as well as its biological activity.

Mine dust is a major occupational hazard. Some types of dust (coal, schist, sulfur, sulfide) can also, under certain conditions, form an explosive mixture with air. Dust is dangerous because it can damage the lungs and living tissue by coarse-fiber connective tissue; it can also lead to diseases of the upper respiratory tracts, eyes, and skin. Moreover, the dust of minerals containing lead, manganese, arsenic, and other elements is toxic, and uranium and thorium dusts are radioactive.

Dust content in the air is controlled in two ways. On the one hand, dust can be removed from the air through precipitation of dust in filters with determination of the dust’s weight content or through precipitation of the dust on screens with determination of particle size and number of particles. Alternately, photoelectric, electrometric, optical, and radiation methods can be used without extracting the dust from the air; these methods involve determination of the weight content of the dust and the number of dust particles and their size.

The disease pneumoconiosis is mainly associated with the weight of the dust that is inhaled and not with the number of particles; in the USSR, therefore, concentrations of dust in the air are determined by weight. Permissible concentrations in the air of a working zone (up to 2 m above the floor of the excavation) range from 1 to 10 mg/m3; for toxic dust, the range is 0.01 to 6 mg/m3.

REFERENCE

Komarov, V. B., and Sh. Kh. Kil’keev. Rudnichnaia ventiliatsiia, 2nd ed. Moscow, 1969.

S. IA. KHEIFITS

References in periodicals archive ?
It will ensure coal workers with any concerns about coal workers pneumoconiosis or a Coal Mine Dust Lung Disease can access a medical examination through the workers compensation scheme.
Coal workers' pneumoconiosis, also known as "black lung disease," is an occupational lung disease caused by overexposure to respirable coal mine dust.
Main also said the industry is continuing to make significant strides on lowering respirable coal mine dust levels.
Mine Safety and Health Administration (MSHA) announced it is temporarily delaying its respirable coal mine dust sampling because of a newly discovered interference issue between the sampling devices and proximity protection systems.
A disregard for "black lung disease," which is fatal, caused by inhaling mine dust (during the jury trial, jurors were told of miners being instructed to wear dust pumps inside their coveralls in an effort to skew the results.
Coal mine dust isn't uniform; it's a jumble of substances and particle sizes, which vary in their effects on the lungs.
El articulo "Nuisance Dust": Unprotective Limits For Exposure To Coal Mine Dust In The United States, 1934-1969", examino el despido de polvo de las minas de carbon.
Confusion prevails in mine dust counts," Labor Canada, 27 May 1975; "Union and Management views clash at Mine Safety probe," The Searcher, Sudbury, Local 6500, 13, 2, February 1975; Julian Hayashi, "Cover-up claimed over 'killer' dust," Free Press, 19 February 1975.
According to the circuit court opinion, revised 103(k) orders prevented Performance Coal from "taking or retaining photographs, collecting and preserving mine dust samples, employing mine mapping technology, and participating in or objecting to any destructive testing of materials gathered underground.
The US standard for respirable coal mine dust was established by the Federal Coal Mine Health and Safety Act in 1969.
My grandfather survived two world wars but it was the mine dust that debilitated and eventually killed him.
And she covered the major political events of the decades, such as the Miners' Strikes of the 1980s where she snapped Arthur Scargill covered in mine dust, and the Yom Kippur War in 1973.