|Document ID (ISN)||108718|
|Convention or series no.
||DHHS (NIOSH) Publication No.2008-124
||Frictional ignition of methane-air in the presence of liquid hydrocarbons
||Publications Dissemination, National Institute for Occupational Safety and Health (NIOSH), 4676 Columbia Parkway, Cincinnati, OH 45226-2001, USA, Mar. 2008. 2p. Illus. 2 ref.
||http://www.cdc.gov/niosh/mining/pubs/pdfs/2008-124.pdf [in English]
||Methane ignitions in underground coal mining are often caused by the impact of mining machine cutter bits on sandstone during the coal-cutting process. Most ignitions are small and limited to the cutter head location. However, under certain conditions, these ignitions can lead to larger methane explosions and/or fires with the potential for causing serious injury or death to the mining machine operator and other nearby miners. A series ignition tests were conducted in a test chamber, with various methane-air mixtures with and without the presence of liquid hydrocarbons on the sandstone. It was found that hydrocarbon vapours can ignite at significantly lower temperatures than the methane. Extra precautions to prevent fires and explosions must be taken when heavier molecular weight liquid hydrocarbons are present in addition to methane in an underground coal mine.
||USA; hydrocarbons; methane; coal mining; underground mining; explosion hazards; risk factors; fire hazards
||safety engineering; ventilation systems; flammability testing; public OSH institutions
||E - Books, reports, proceedings
|Country / State or Province||USA|
||Mines and quarries
Fire and explosions
|Broad subject area(s)
||Fires, explosions and major hazards
Aliphatic and alicyclic hydrocarbons
Mining and quarrying