Development of a system to suppress and extinguish fully developed coal dust explosions: progress report. Technical report

Technical Report · Sat Sep 01 04:00:00 EDT 1973

OSTI ID:7093445

Johnson, L D; Canfield, J A; Lull, D B; Morris, T F

A program for the Bureau of Mines to develop a system to suppress coal mine dust explosives has achieved certain notable results at the end of the first year. After extensive study of coal dust explosion phenomena a project plan was developed, a test facility built and several suppression devices tested. The facility is a 4.5 foot diameter shock tube, 317 feet in length, and to date 53 tests have been carried out with methane-air and methane/coal dust-air as the explosive mixtures. Suppression of slowly propagating (up to 300 ft/sec) flame fronts has been successfully carried out on two tests using the dry chemical extinguishing agent Purple K. Delivery of the material directly into the flame front seems to be required if effective suppression is to be accomplished. (Author) (GRA)

• Research Organization: Naval Weapons Lab., Dahlgren, VA (USA)
• OSTI ID: 7093445
• Report Number(s): AD-768742/9; NWL-TR-3030
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
016000 -- Coal
Lignite
& Peat-- Health & Safety
ALKANES
CARBONACEOUS MATERIALS
COAL
COAL MINES
CRYOGENIC FLUIDS
DUSTS
ENERGY SOURCES
EXPLOSIONS
FIRE EXTINGUISHERS
FLAMES
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
IGNITION
METHANE
MINES
ORGANIC COMPOUNDS