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CISDOC database

Document ID (ISN)108718
CIS number 08-1159
Year 2008
Convention or series no. DHHS (NIOSH) Publication No.2008-124
Title Frictional ignition of methane-air in the presence of liquid hydrocarbons
Bibliographic information Publications Dissemination, National Institute for Occupational Safety and Health (NIOSH), 4676 Columbia Parkway, Cincinnati, OH 45226-2001, USA, Mar. 2008. 2p. Illus. 2 ref.
Internet access http://www.cdc.gov/niosh/mining/pubs/pdfs/2008-124.pdf [in English]
Abstract 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.
Descriptors (primary) USA; hydrocarbons; methane; coal mining; underground mining; explosion hazards; risk factors; fire hazards
Descriptors (secondary) safety engineering; ventilation systems; flammability testing; public OSH institutions
Document type E - Books, reports, proceedings
Country / State or ProvinceUSA
Subject(s) Mines and quarries
Fire and explosions
Broad subject area(s) Fires, explosions and major hazards
Browse category(ies) Fires
Aliphatic and alicyclic hydrocarbons
Mining and quarrying
Explosions