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Coal dust suspended in air is explosive—coal dust has far more surface area per unit weight than lumps of coal, and is more susceptible to spontaneous combustion. However, five elements are needed for an explosion to occur: oxygen, an ignition source, coal dust, dispersion of the coal dust, and confinement of the dust. [ 4 ]
Dust less than 10 microns in size cannot be seen with the eye. In non-coal mining, stone, and sand and gravel mining operations and for particular occupations in coal mines, the respirable silica dust created during mining is the primary concern. [11] Respirable dust can cause long-term lung problems.
Rock dust is a pulverized rock, usually limestone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease. Rock dust has been used since the early 1900s, but technological improvements have occurred. [1]
Coal miners will be better protected from poisonous silica dust that has contributed to the premature deaths of thousands of mine workers from a respiratory ailment commonly known as black lung ...
Black lung disease (BLD), also known as coal workers' pneumoconiosis, [1] or simply black lung, is an occupational type of pneumoconiosis caused by long-term inhalation and deposition of coal dust in the lungs and the consequent lung tissue's reaction to its presence. [2]
During various mining processes in which rock/minerals are broken up and collected for processing, mineral dusts are created and become airborne. Inhalation of these dusts can lead to various respiratory illnesses, depending on the dust type (e.g. coal, silica, etc.), size of the dust particulates, and exposure duration. [4]
The Farmington Mine disaster, which killed 78 people in West Virginia in 1968 Miners can be regularly monitored for reduced lung function due to coal dust exposure using spirometry. Coal mining has been a very dangerous activity and the list of historical coal mining disasters is long.
coal dust: 75: The series of coal dust explosions within a mine rocked the close-knit township and was audible as far as 30 kilometres (19 mi) away. Benxihu Colliery explosion: April 26, 1942: Benxi, Liaoning Manchukuo (now China) coal dust and gas: 1,549: 34% of the miners working that day were killed. This is the world's worst-ever coal ...
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