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Response of Underground Fire Sensors: An Evaluation.

PB92206937

Publication Date	1992
Personal Author	Conti, R. S.; Litton, C. D.
Page Count	21
Abstract	The report discusses the results of research conducted in the Experimental Mine at Lake Lynn Laboratory on the response of fire-sensors to simulated mine fires, which include: (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 will alarm several minutes before carbon monoxide (CO) sensors; 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 carbon monoxide sensors. Results also indicate that early detection of fires will improve the probability of miners' escape, due to reduced smoke concentrations during the incipient stages of the fire.
Keywords	Fire alarm systems Mine fires Mines Performance tests Warning systems Mining engineering Sensors Fire prevention Underground mining Fire tests Combustion products Safety engineering Exhaust gases Smoke
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 92-3617.
Document Type	Technical Report
Title Note	Rept. of investigations/1992.
NTIS Issue Number	199220

Response of Underground Fire Sensors: An Evaluation.

Response of Underground Fire Sensors: An Evaluation.
PB92206937

Publication Date	1992
Personal Author	Conti, R. S.; Litton, C. D.
Page Count	21
Abstract	The report discusses the results of research conducted in the Experimental Mine at Lake Lynn Laboratory on the response of fire-sensors to simulated mine fires, which include: (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 will alarm several minutes before carbon monoxide (CO) sensors; 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 carbon monoxide sensors. Results also indicate that early detection of fires will improve the probability of miners' escape, due to reduced smoke concentrations during the incipient stages of the fire.
Keywords	Fire alarm systems Mine fires Mines Performance tests Warning systems Mining engineering Sensors Fire prevention Underground mining Fire tests Combustion products Safety engineering Exhaust gases Smoke
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 92-3617.
Document Type	Technical Report
Title Note	Rept. of investigations/1992.
NTIS Issue Number	199220