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Mining Publication: Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder System
Keywords: Bleeder systems Boreholes Coal mining Degasification Gas emissions 
 Methane
Original creation date: January 1980
Authors: SD Maksimovic, FN Kissell
Report of Investigations - January 1980
Download PDF Document (0.82 MB)
NIOSHTIC2 Number: 10000739
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8459, 1980 Jan; :1-10
The use of vertical surface degasification boreholes with bleeder systems and the use of a timbered bleeder system to degasify gob areas were studied by the Bureau of Mines. This report describes three gob degasification studies conducted in the Pittsburgh coalbed. One study was conducted to determine the number of panels degasified with one large borehole. The study showed that the borehole provided degasification for three panels. Another study was conducted during the retreat of a 35-acre panel with a single- entry and a two-entry bleeder system and a large surface borehole. A major portion of methane emitted from the panel was carried away by the borehole, leaving the bleeder entries relatively free of methane. The last study was made to determine the effectiveness of a timbered bleeder system. The bleeder entries successfully degasified the gob area when enough entries were available and adequate pressure was available to force the air through roof falls.
Image of publication Three Coal Mine Gob Degasification Studies Using Surface Boreholes and a Bleeder SystemReport of Investigations - January 1980
Download PDF Document (0.82 MB)
NIOSHTIC2 Number: 10000739
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8459, 1980 Jan; :1-10
See Also
Coal Mine Methane: A Review of Capture and Utilization Practices with Benefits to Mining Safety and to Greenhouse Gas Reduction
Methane Control by Isolation of a Major Coal Panel - Pittsburgh Coalbed
Methane Drainage and Migration
Methane Emission from U.S. Coal Mines, A Survey
Methane Emission Rate Studies in a Northern West Virginia Mine
Methane Emissions from Four Working Places in the Beckley Mine, Raleigh County, W. Va.
Removing Methane (Degasification) from the Pittsburgh Coalbed in Northern West Virginia
Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
Rotary Drilling Techniques Used in the Beckley Coalbed
Two-Phase Flow in Coalbeds
Page last reviewed: January 3, 2017
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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