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Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways.

PB2010110565

Publication Date	2010
Personal Author	Cashdollar, K. L.; Snapko, M. J.; Weiss, E. S.; Harris, M. L.; Man, C. K.; Harteis, S. P.; Green, G. M.
Page Count	59
Abstract	The workings of a bituminous coal mine produce explosive coal dust for which adding rock dust can reduce the potential for explosions. Accordingly, guidelines have been established by the Mine Safety and Health Administration (MSHA) about the relative proportion of rock dust that must be present in a mine's intake and return airways. Current MSHA regulations require that intake airways contain at least 65% incombustible content and return airways contain at least 80% incombustible content. The higher limit for return airways was set in large part because finer coal dust tends to collect in these airways. Based on extensive in-mine coal dust particle size surveys and large-scale explosion tests, the National Institute for Occupational Safety and Health (NIOSH) recommends a new standard of 80% total incombustible content (TIC) be required in the intake airways of bituminous coal mines in the absence of methane. Given the results of extensive in-mine coal dust particle size surveys and large-scale explosion tests, NIOSH recommends a new standard of 80% TIC be required in the intake airways of bituminous coal mines in the absence of methane. The survey results indicate that in some cases there are no substantial differences between the coal dust particle size distributions in return and intake air courses in today's coal mines. The survey results indicate that the current requirement of 80% TIC in return airways is still appropriate in the absence of background methane.
Keywords	Coal mining Coal dust Dust explosions Mine ventilation Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201020

Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways.

Recommendations for a New Rock Dusting Standard to Prevent Coal Dust Explosions in Intake Airways.
PB2010110565

Publication Date	2010
Personal Author	Cashdollar, K. L.; Snapko, M. J.; Weiss, E. S.; Harris, M. L.; Man, C. K.; Harteis, S. P.; Green, G. M.
Page Count	59
Abstract	The workings of a bituminous coal mine produce explosive coal dust for which adding rock dust can reduce the potential for explosions. Accordingly, guidelines have been established by the Mine Safety and Health Administration (MSHA) about the relative proportion of rock dust that must be present in a mine's intake and return airways. Current MSHA regulations require that intake airways contain at least 65% incombustible content and return airways contain at least 80% incombustible content. The higher limit for return airways was set in large part because finer coal dust tends to collect in these airways. Based on extensive in-mine coal dust particle size surveys and large-scale explosion tests, the National Institute for Occupational Safety and Health (NIOSH) recommends a new standard of 80% total incombustible content (TIC) be required in the intake airways of bituminous coal mines in the absence of methane. Given the results of extensive in-mine coal dust particle size surveys and large-scale explosion tests, NIOSH recommends a new standard of 80% TIC be required in the intake airways of bituminous coal mines in the absence of methane. The survey results indicate that in some cases there are no substantial differences between the coal dust particle size distributions in return and intake air courses in today's coal mines. The survey results indicate that the current requirement of 80% TIC in return airways is still appropriate in the absence of background methane.
Keywords	Coal mining Coal dust Dust explosions Mine ventilation Occupational safety and health
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201020