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Response of underground fire sensors: an evaluation.

Authors
Conti-RS; Litton-CD
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9412, 1992 Jan; :1-13
Link
NIOSHTIC No.
10011239
Abstract
This U.S. Bureau of Mines report discusses the results of research conducted in the Bureau's experimental mine at Lake Lynn Laboratory on the response of fire sensors to simulated mine fires, which included (1) a slowly developing coal-conveyor belt fire, (2) a rapidly burning liquid fuel-belt fire, and (3) a liquid fuel-belt fire in the presence of diesel exhaust. During these tests, several mine fire sensors were evaluated with respect to sensor placement, spacing, and type. The data indicate that smoke sensors alarm several minutes before CO sensors do; and that, in the presence of diesel exhaust, a prototype diesel-discriminating smoke sensor can successfully function without being sensitive to the diesel contaminants. The vertical placement of sensors in the entry near the fire was also shown to be critical in terms of alarm times. Additional data showed that variations exist in response time and level of response for two brands of electrochemical CO sensor. Results also indicate that early detection of fires will improve the probability of miners' escape, because of reduced smoke concentrations during the incipient stages of the fire.
Keywords
Performance-tests; Warning-systems; Mining-engineering; Sensors; Fire-prevention; Underground-mining; Fire-tests; Combustion-products; Safety-engineering; Exhaust-gases; Smoke; Fire-alarm-systems; Mine-fires; Mines
Publication Date
19920101
Document Type
IH; Report of Investigations
Fiscal Year
1992
NTIS Accession No.
PB92-206937
NTIS Price
A03
Identifying No.
RI-9412
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9412
State
PA
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