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Experimental and modeling investigation of the effect of ventilation on smoke rollback in a mine entry.

Authors
Edwards-JC; Franks-RA; Friel-GF; Yuan-L
Source
Min Eng 2006 Apr; 58(4):53-58
NIOSHTIC No.
20030021
Abstract
To determine the critical air velocity for preventing smoke rollback, diesel-fuel fire experiments were conducted in the NIOSH Pittsburgh Research Laboratory's Safety Research Coal Mine. Such information is necessary for preplanning and implementing ventilation changes during mine firefighting and rescue operations. The fire intensity varied from 50 to 300 kW depending on the fuel tray area. Airflow in the 6.6-ft-high, 9.5-ft-wide coal mine entry was regulated during the course of each experiment. The airflow was measured upwind from the fire as an average over the entry cross-section with an ultrasonic airflow sensor and was recorded dynamically with a mine monitoring system. The extent of smoke reversal was monitored with light-obscuration monitors, ionization smoke sensors, and visual observations. Experimental results for the critical air velocity for smoke reversal as a function of fire intensity compared very well with model predictions based on a computational fluid dynamics (CFD) fire dynamics simulator.
Keywords
Ventilation; Fire-fighting; Underground-mining; Mine-fires; Mine-rescue; Miners; Models; Smoke; Safety-research; Air-flow; Gases; Combustible-gases; Heat; Injuries; Hazards; Coal-mining; Fire-hazards; Disaster-prevention; Fire-prevention
Contact
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CODEN
MIENAB
CAS No.
630-08-0
Publication Date
20060401
Document Type
Journal Article
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Issue of Publication
4
ISSN
0026-5187
NIOSH Division
PRL
Source Name
Mining Engineering
State
PA
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