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How can coal dust exposure cause black lung disease in underground miners?
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coal mining
Schematic diagram of an underground coal mine, showing surface facilities, access shafts, and room-and-pillar and longwall mining methods.
Black lung disease, or coal workers' pneumoconiosis, is a respiratory disorder caused by the repeated inhalation of coal dust over many years.12
In underground mining environments, this process occurs as follows:
- Deposition: When inhaled, coal dust particles are deposited in the terminal bronchioles of the lung.2
- Fibrotic Reaction: The presence of this dust triggers a fibrotic reaction in the lung tissue. While early stages—often called anthracosis—may present with little to no disability, the accumulation of dust creates a distinctive blue-black marbling effect within the lung.21
- Progression: Over time, the condition can advance to a more generalized form. In severe cases, it leads to progressive massive fibrosis, where large masses of fibrotic tissue form, causing severe disability and increasing the risk of secondary heart failure.2
While modern technology allows for the remote monitoring of airborne dust concentrations in mines, there is no curative treatment for the disease once it has developed.23