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Performance of concrete block and steel panel stoppings in a simulated mine fire.

Authors
Ng-DL; Lazzara-CP
Source
Fire Technol 1990 Feb; 26(1):51-74
NIOSHTIC No.
10007531
Abstract
The U.S. Bureau of Mines constructed a facility in the multiple-entry section of its Bruceton Experimental Mine to evaluate the fire endurance of mine stoppings. The test stopping (up to 6 ft high by 18 ft wide) is subjected to a 70 min, 75,000 Btu/min liquid fuel tray fire. The stopping and adjacent areas are instrumented with thermocouples and heat flux gauges. Two 8 in. thick concrete block stoppings and a galvanized steel stopping were evaluated in four tests. A crack developed on the fire-exposed surface of both block stoppings where the flames were most intense. However, the unexposed surface of the stoppings was undamaged and its maximum temperature was about 80C. The steel stopping retained its structural integrity during the test. The temperature of the unexposed steel surface reached 490C, but combustible materials located 1 ft from the surface did not ignite. Heat energy transmitted across the steel stopping was approximately halved when a 3/4 in. thick coating of construction plaster was applied to its fire-exposed surface. All stoppings prevented the passage of flame and smoke.
Keywords
Fire-hazards; Fire-protection; Fire-resistant-materials; Smoke-control; Mine-fires; Mine-shafts; Mining-industry
CODEN
FITCAA
Publication Date
19900201
Document Type
OP; Journal Article
Fiscal Year
1990
NTIS Accession No.
NTIS Price
Identifying No.
OP 50-90
Issue of Publication
1
ISSN
0015-2684
NIOSH Division
PRC
Source Name
Fire Technology
State
PA
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