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Coal mine methane: a review of capture and utilization practices with benefits to mining safety and to greenhouse gas reduction.

Authors
Karacan-C; Ruiz-FA; Cote-M; Phipps-S
Source
Int J Coal Geol 2011 May; 86(2-3):121-156
NIOSHTIC No.
20038813
Abstract
Coal mine methane (CMM) is a term given to the methane gas produced or emitted in association with coal mining activities either from the coal seam itself or from other gassy formations underground. The amount of CMM generated at a specific operation depends on the productivity of the coal mine, the gassiness of the coal seam and any underlying and overlying formations, operational variables, and geological conditions. CMM can be captured by engineered boreholes that augment the mine's ventilation system or it can be emitted into the mine environment and exhausted from the mine shafts along with ventilation air. The large amounts of methane released during mining present concerns about adequate mine ventilation to ensure worker safety, but they also can create opportunities to generate energy if this gas is captured and utilized properly. This article reviews the technical aspects of CMM capture in and from coal mines, the main factors affecting CMM accumulations in underground coal mines, methods for capturing methane using boreholes, specific borehole designs for effective methane capture, aspects of removing methane from abandoned mines and from sealed/active gobs of operating mines, benefits of capturing and controlling CMM for mine safety, and benefits for energy production and greenhouse gas (GHG) reduction.
Keywords
Coal-mining; Coal-gas; Underground-mining; Methane-control; Methane-drainage; Methanes; Safety-measures; Control-methods; Control-systems; Ventilation; Gases; Geology; Engineering-controls; Chemical-extraction; Chemical-processing; Author Keywords: Coal mine methane; Mining safety; Methane drainage; Ventilation air methane; Methane utilization; Greenhouse gas reduction
Contact
C..Karacan, NIOSH, Office of Mine Safety and Health Research, 626 Cochrans Mill Road, Pittsburgh, PA, 15236, USA
CODEN
IJCGDE
CAS No.
74-82-8
Publication Date
20110501
Document Type
Journal Article
Email Address
cok6@cdc.gov
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
2-3
ISSN
0166-5162
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
International Journal of Coal Geology
State
PA; DC; CO
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