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GEOREF RECORD

Subsurface coal-mine fires; laboratory simulation, numerical modeling, and depth estimation

Anupma Prakash and Antony R. Berthelote
Subsurface coal-mine fires; laboratory simulation, numerical modeling, and depth estimation (in Geology of coal fires; case studies from around the world, Glenn B. Stracher (editor))
Reviews in Engineering Geology (2007) 18: 211-218

Abstract

Subsurface coal-mine fires occur in many mining regions, especially where coal has been previously excavated by "room-and-pillar" mining methods. The surface above these fires heats up to produce a thermal anomaly. The shape of the temperature profile over the fire zone holds clues to the depth of the underground fire. We simulated an underground coal-mine fire in the laboratory by burying a hot glass tube in a sandbox. The thermal anomaly over the tube was recorded using a forward looking infrared radiometer (FLIR (super TM) ) camera. Numerical modeling using finite-element techniques for various combinations of tube depth and tube temperature helped to empirically derive a depth-estimation function, called the linear anomaly surface transect (LAST) function. Comparisons of the results from the LAST function with the half-anomaly-width function for depth estimation developed by Panigrahi et al. (1995) showed that the LAST function gave more accurate results for shallow subsurface coal fires ranging in depth from a few centimeters to approximately 10 m. For moderate-depth coal fires, ranging in depth from 10 m to 40 m, the depths estimated by the two functions were comparable.


ISSN: 0080-2018
EISSN: 2169-799X
Coden: GAEGA4
Serial Title: Reviews in Engineering Geology
Serial Volume: 18
Title: Subsurface coal-mine fires; laboratory simulation, numerical modeling, and depth estimation
Title: Geology of coal fires; case studies from around the world
Author(s): Prakash, AnupmaBerthelote, Antony R.
Author(s): Stracher, Glenn B.editor
Affiliation: University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States
Affiliation: East Georgia College, Division of Natural Science and Mathematics, Swainsboro, GA, United States
Pages: 211-218
Published: 2007
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 36
Accession Number: 2008-099580
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200834
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