Evaluation of Potential Fire Hazard Caused by Exposed Timber in Mine Passageways.
NTIS: PB/245-903 Available for Reference At Bureau Libraries :57 pages
Tests were conducted to determine whether a fire hazard exists when the exposed wood surface area of timber in a mine passageway equals 40 pct of the surrounding strata surface, excluding the sill. Twelve full-scale fire tests were conducted in simulated mine passageways, using kerosine pan fires as the ignition source. The tests included three timber sizes, plus one test with roof lagging, two wood types, plus one test with treated timbers, and two ventilation air velocities. The results show air velocity to be an important factor in the occurrence of flame propagation and that the 40-pct surface area ratio of wood to surrounding strata appears to be a valid criteria for fire safety at 150 fpm but not at 350 fpm.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/245-903 Available for Reference At Bureau Libraries
Walter Kidde & Company, Inc.