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Improved method for extinguishing coal refuse fires.

Authors
Gross-SS
Source
NTIS: PB 91-227819 Available for Reference At Bureau Libraries, 1991; :1-100
Link
NIOSHTIC No.
10011052
Abstract
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.
Publication Date
19910101
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1991
NTIS Accession No.
PB91-227819
NTIS Price
A06
Identifying No.
OFR 38-91
Source Name
NTIS: PB 91-227819; Available for Reference At Bureau Libraries
Performing Organization
Msa Research Corp.
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