Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Review of Rock Dusting Practices in Underground Coal Mines
Proper rock dusting practices have proven to be an effective means of preventing coal dust explosions. Rock dust (generally pulverized limestone dust) serves as a heat sink material that prevents or suppresses a propagating coal dust explosion through the absorption of thermal energy from the heated gases and absorption of radiant energy, which reduces the preheating of unburned coal particles ahead of the flame front. Therefore to effectively suppress a coal dust explosion, sufficient quantities of dispersible rock dust must be entrained into the mine entry by the expanding explosion pressure wave to inert the coal dust, also entrained in the entry. The in-mine application of rock dust dates back to the early 1900s. Since that time, significant technological improvements to rock dust application methods have been implemented along with increasingly stringent regulatory requirements and inspections to ensure adequate quantities of rock dust are applied to the roof, ribs, and floor throughout the mine. Even with enhancements to the rock dusting application methods and equipment, coal mining operations still experience compliance issues associated with meeting the current total incombustible content (TIC) requirement of at least 80% for all mine dust samples. The National Institute for Occupational Safety and Health (NIOSH) conducted general surveys of rock dusting practices at nine underground coal mining operations and met with Mine Safety and Health Administration (MSHA) mine inspectors and District personnel to gain a better understanding of the rock dusting practices and associated compliance issues during this survey period.
Review of Rock Dusting Practices in Underground Coal Mines
Proper rock dusting practices have proven to be an effective means of preventing coal dust explosions. Rock dust (generally pulverized limestone dust) serves as a heat sink material that prevents or suppresses a propagating coal dust explosion through the absorption of thermal energy from the heated gases and absorption of radiant energy, which reduces the preheating of unburned coal particles ahead of the flame front. Therefore to effectively suppress a coal dust explosion, sufficient quantities of dispersible rock dust must be entrained into the mine entry by the expanding explosion pressure wave to inert the coal dust, also entrained in the entry. The in-mine application of rock dust dates back to the early 1900s. Since that time, significant technological improvements to rock dust application methods have been implemented along with increasingly stringent regulatory requirements and inspections to ensure adequate quantities of rock dust are applied to the roof, ribs, and floor throughout the mine. Even with enhancements to the rock dusting application methods and equipment, coal mining operations still experience compliance issues associated with meeting the current total incombustible content (TIC) requirement of at least 80% for all mine dust samples. The National Institute for Occupational Safety and Health (NIOSH) conducted general surveys of rock dusting practices at nine underground coal mining operations and met with Mine Safety and Health Administration (MSHA) mine inspectors and District personnel to gain a better understanding of the rock dusting practices and associated compliance issues during this survey period.
Review of Rock Dusting Practices in Underground Coal Mines
S. P. Harteis (Autor:in) / D. W. Alexander (Autor:in) / M. L. Harris (Autor:in) / M. J. Sapko (Autor:in) / E. S. Weiss (Autor:in)
2016
96 pages
Report
Keine Angabe
Englisch
Natural Resource Surveys , Mineral Industries , Job Environment , Detonations, Explosion Effects, & Ballistics , Soil & Rock Mechanics , Soil Sciences , Air Pollution & Control , Environmental Health & Safety , Public Health & Industrial Medicine , Work environment , Underground mines , Hazards , Workers , Workers safety , Coal mines , Coal dust , Dusts , Dust explosions , Rock dusting , Explosions , Explosion prevention , Explosive dusts , Thermal effects , Heat , Gases , Radiant energy , Particulate dust , Particulates , Dust sampling , Sampling , Laboratories
| Engineering Index Backfile | 1926
Methods of rock-dusting American coal mines
| Engineering Index Backfile | 1939
Rock dusting and sampling including wet rock dusting, at bureau of mines experimental coal mine
| Engineering Index Backfile | 1956
Rock dusting and sampling including wet rock dusting, at bureau of mines experimental coal mine
| Engineering Index Backfile | 1956
Methods of rock dusting bituminous mines
| Engineering Index Backfile | 1924