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Analysis and prediction of longwall methane emissions: a case study in the Pocahontas No.3 Coalbed, VA.

Authors
Diamond-WP; Garcia-F; Aul-GN; Ray-RE
Source
Proceedings of the 6th International Mine Ventilation Congress, May 17-22, 1997, Pittsburgh, Pennsylvania. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc. 1997 Feb; :223-229
Link
NIOSHTIC No.
20027792
Abstract
Increasing longwall panel dimensions, particularly face width in gassy coalbeds, may result in unexpected increases in methane emissions. To investigate this problem, continuous longwall face emission monitoring studies were conducted at two adjacent mines operating in the Pocahontas No. 3 Coalbed, where longwall faces were to be extended from 229 to 305 m (750 to 1,000 ft). It was predicted by regression analysis of methane emissions data from 229 m (750 ft) wide longwall faces that extending faces to 305 m (1,000 ft) would increase methane emission rates by only 7 percent (0.6 m3/min (20 cfm)), to 8.6 m3/min (304 cfm) at the VP-1 Mine. In contrast, it was predicted that extending faces at the VP-3 Mine could increase methane emissions by as much as 13 percent (1.8 m3/min (65 cfm)) to 16.1 m3/min (567 cfm). The geologic and mine design factors influencing the variation in face emissions between the two mines will be discussed.
Keywords
Methanes; Case-studies; Emission-sources; Gases; Coal-mining; Monitors; Monitoring-systems; Mining-industry; Longwall-mining
CAS No.
74-82-8
Publication Date
19970201
Document Type
Conference/Symposia Proceedings
Editors
Ramani-RV
Fiscal Year
1997
NTIS Accession No.
NTIS Price
ISBN No.
0873351460
NIOSH Division
PRL
Source Name
Proceedings of the 6th International Mine Ventilation Congress
State
PA; VA; NY
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