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Improved method for extinguishing coal refuse fires.
NTIS: PB 91-227819 Available for Reference At Bureau Libraries, 1991; :1-100
Coal refuse fires present environmental and personnel hazards to those living in the vicinity of the fire as well as those engaged in the reclamation efforts. The fire can also increase subsidence problems as well as prevent revegetation and reclamation of the site. Conventional efforts have been excavation and quenching, which are expensive, dangerous, and very often unsuccessful techniques. Water flooding has also proven unsuccessful owing to the poor distribution of the water in the refuse pile. Water quickly drains from the coal refuse pile below its injection point with little or no lateral distribution. As an alternate to excavation and/or quenching, the feasibility of using water-based foams to improve the distribution of water injected into a coal refuse fire was examined. Using surfactants to foam the water and gelling agents to reduce its fluidity, tests were conducted in the laboratory and the field. The foam still tends to follow the larger channels and openings in the pile, although above as well as below the injection point. While the foam does improve water distribution in the pile, additional work needs to be conducted to prevent preferential channel flow and further improve distribution.
CP; Final Contract Report
NTIS Accession No.
NTIS: PB 91-227819; Available for Reference At Bureau Libraries
Msa Research Corp.
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division