Model of coal dust explosion suppression by rock dust entrainment

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5464272

Edwards, J C; Ford, K M

The Bureau of Mines developed a mathematical model to calculate the aerodynamically induced lifting of coal and rock dust from a composite deposition on a mine entry floor and the subsequent transport of the dust ahead of the propagating combustion zone of a coal dust explosion. For a series of experimental explosibility tests approximated by combustion zones that expand at a constant flame velocity, the mass fraction of airborne rock dust ahead of the flame front, as well as the mass fraction overtaken by the combustion zone, was calculated. A statistical analysis of the theoretical results demonstrated with a high level of confidence that the propagating and nonpropagating test samples belonged to separate populations. This analysis was further supported by an independent model of the average temperature over the combustion zone.

• Research Organization: Bureau of Mines, Pittsburgh, PA (USA)
• OSTI ID: 5464272
• Report Number(s): RI-9206
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012033 -- Coal
Lignite
& Peat-- Underground Mining-- Mine Environment-- (1987-)
014000 -- Coal
Lignite
& Peat-- Combustion
016000* -- Coal
Lignite
& Peat-- Health & Safety
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
DUSTS
EXPLOSIONS
FIRE HAZARDS
HAZARDS
MATHEMATICAL MODELS
MINING
OCCUPATIONAL SAFETY
OXIDATION
SAFETY
THERMOCHEMICAL PROCESSES
UNDERGROUND MINING