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Mining Publication: NIOSH Hazard Controls 27 - New Shroud Design Controls Silica Dust from Surface Mine and Construction Blast Hole Drills
Keywords: Dust control Silica dust Surface mining
Original creation date: November 1998
Authors: SJ Page, JA Organiscak, JP Flesch, RT Hagedorn
Hazard Control - November 1998
Download PDF Document (7.21 MB)
NIOSHTIC2 Number: 20000314
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 98-150, 1998 Nov; : 1-4
Exposure to airborne respirable crystalline silica dust can lead to silicosis, a debilitating lung disease. On surface coal mining and construction sites, blast hole drills are notorious sources of airborne respirable dust that may contain significant amounts of silica. The drill operator and drill helper usually receive the greatest silica exposure compared with other occupations. As a result, many drilling operations have been, and still are, on more stringent dust standards. Drilling through various rock formations naturally presents a strong potential for silica dust generation for several reasons. First, drilling is a pulverizing process that generates large amounts of very small dust particles. Second, the bailing air used to flush cuttings from the hole leaves the hole at a very high velocity and can be difficult to contain. Third, many fixed shrouds used to enclose the area beneath the drill deck have a significant amount of leakage due to 1) gaps between the shroud and ground created by raising/leveling the drill, 2) gaps in the corner seams, and 3) torn deck shrouds.
Image of publication NIOSH Hazard Controls 27 - New Shroud Design Controls Silica Dust from Surface Mine and Construction Blast Hole DrillsHazard Control - November 1998
Download PDF Document (7.21 MB)
NIOSHTIC2 Number: 20000314
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 98-150, 1998 Nov; : 1-4
See Also
Control of Respirable Dust
An Evaluation of Methods for Controlling Silica Dust Exposures on Roof Bolters
Improving Silica Dust Control Through Targeted Research
Improving the Performance of Fan-Powered Dust Collectors in Stone-Cutting Applications
Key Design Factors of Enclosed Cab Dust Filtration Systems
Silica Dust Sources in Underground Limestone Mines
Silica Dust Sources in Underground Metal/Nonmetal Mines - Two Case Studies
Silica...It's Not Just Dust
Technology News 440 - Improved Dust Control for Surface Coal Mine Drills With Rotoclone Collectors
Technology News 447 - Dust Collector Discharge Shroud Reduces Dust Exposure to Drill Operators at Surface Coal Mines
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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