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Evaluation of Potential Fire Hazard Caused By Exposed Timber in Mine Passageways.

PB245903

Publication Date	1975
Personal Author	Warner, B. L.
Page Count	60
Abstract	The research involved testing to determine whether a fire hazard existed when the exposed wood surface area of timber in a mine passageway equals 40 percent of the surrounding strata surface, excluding the sill. Twelve full-scale fire tests were conducted in a simulated mine passageway, using kerosene 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 showed that air velocity was an important factor in the occurrence of flame propagation and that 40 percent surface area ratio of wood to surrounding strata appeared to be a valid criteria for fire safety at 150 fpm, but not at 350 fpm.
Keywords	Fire hazards Mines(Excavations) Passageways Underground supporting Timbering(Supporting) Structural timber Mine fires Fire safety Evaluation Mine ventilation Mine safety
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Kidde (Walter) and Co., Inc., Belleville, N.J.; BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Research rept. 1974.
NTIS Issue Number	197602
Contract Number	H0144068

Evaluation of Potential Fire Hazard Caused By Exposed Timber in Mine Passageways.

Evaluation of Potential Fire Hazard Caused By Exposed Timber in Mine Passageways.
PB245903

Publication Date	1975
Personal Author	Warner, B. L.
Page Count	60
Abstract	The research involved testing to determine whether a fire hazard existed when the exposed wood surface area of timber in a mine passageway equals 40 percent of the surrounding strata surface, excluding the sill. Twelve full-scale fire tests were conducted in a simulated mine passageway, using kerosene 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 showed that air velocity was an important factor in the occurrence of flame propagation and that 40 percent surface area ratio of wood to surrounding strata appeared to be a valid criteria for fire safety at 150 fpm, but not at 350 fpm.
Keywords	Fire hazards Mines(Excavations) Passageways Underground supporting Timbering(Supporting) Structural timber Mine fires Fire safety Evaluation Mine ventilation Mine safety
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Kidde (Walter) and Co., Inc., Belleville, N.J.; BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Research rept. 1974.
NTIS Issue Number	197602
Contract Number	H0144068