Record Display for the EPA National Library Catalog

RECORD NUMBER: 8 OF 9

OLS Field Name OLS Field Data
Main Title Method for Estimating Methane Emissions from Underground Coal Mines: Preliminary Findings.
Author Jones, J. W. ; Kirchgessner, D. A. ; Piccot, S. D. ; Winkler, J. D. ; Marsosudiro, P. J. ;
CORP Author Alliance Technologies Corp., Chapel Hill, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 4 Sep 90
Year Published 1990
Report Number EPA-68-D9-0173; EPA/600/D-91/151;
Stock Number PB91-223214
Additional Subjects Methane ; Underground mining ; Coal mining ; Air pollution sampling ; Emission factors ; Mathematical models ; Study estimates ; Concentration(Composition) ; Ventilation ; Global aspects ; Crushing ; Data processing ; Regression analysis ; Physical properties ; Chemical properties ; Gob wells
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB91-223214 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/26/1991
Collation 18p
Abstract
The paper discusses the development of an improved method for estimating global methane (CH4) emissions from underground coal mining. Since emissions data are presently not available for surface mines, this method is currently restricted to underground mines. The EPA has embarked on a measurements program to quantify CH4 emissions from selected surface mines in the U.S. for later inclusion in this work. CH4 from underground mines can be liberated from three sources: ventilation shafts, gob wells, and crushing operations. Ventilation air, although generally containing 1% or less CH4, contributes most mine emissions because of the enormous volume of air used to ventilate the mine. Gob wells are drilled into the rubble-filled areas formed when the mine roof subsides into the unsupported cavity left behind by longwall mining. Their purpose is to remove CH4 which would otherwise have to be removed by larger and more costly ventilation systems. Currently, no published data exist for the release of CH4 from gob wells. However, preliminary data from the coal mining industry indicate that gob well CH4 emissions could account for a significant fraction of the total emissions associated with longwall mines. The method described in the paper integrates data on coal production, coal properties, coalbed CH4 contents, and coal mine ventilation air emissions from U.S. mines.