| 21. | Firedamp explosions can trigger the much more dangerous coal dust explosions, which can engulf an entire pit.
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| 22. | Dust explosions are a frequent hazard in underground coal mines, in grain elevators, and other industrial environments.
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| 23. | Firedamp explosions continued, often setting off coal dust explosions, so casualties grew during the entire 19th century.
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| 24. | This is to prevent coal dust explosions and also to prevent the incidence of black lung disease.
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| 25. | In most cases, the conditions for fires or dust explosions are not met in pneumatic conveying paths.
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| 26. | Dust explosions may be classified as being either " primary " or " secondary " in nature.
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| 27. | It is thought to have been caused by a methane explosion followed by a coal dust explosion.
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| 28. | :: : This dust explosion safety guide has a lot of useful information about the physics behind them.
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| 29. | Wilson said that was typical of grain dust explosions, as one blast kicks up dust, which in turn ignites.
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| 30. | Therefore, it is possible to equip these systems with spark extinguishing systems as preventive fire and dust explosion protection.
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