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Mining Publication: Bleeder System in Virgin Area in a Pittsburgh Coalbed Mine
Keywords: Bleeder entries Bleeder systems Surveys
Original creation date: January 1973
Authors: S Krickovic, TD Moore, JE Carpetta
Report of Investigations - January 1973
Download PDF Document (0.59 MB)
NIOSHTIC2 Number: 10000716
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB-225270, RI 7805, 1973 Jan; :1-8
Air quantity-pressure and methane concentration surveys were conducted by the Bureau of Mines in accessible portions of an area being pillared in a Pittsburgh coalbed mine in West Virginia. These included two mined-out and three active butt headings and a bleeder system. The particular mine workings were started in virgin coal directly from a set of main headings; the main reason for the study was the difficulty usually encountered in adequately bleeding the gobs under such conditions. Although the two separate return airways in each active butt heading and the north and 1 left bleeders contained acceptable methane concentrations (0.01 to 0.78 percent in the butts and 0.73 to 1.0 percent in the bleeders) with significant total methane removal (109 cfm in butts and 631 cfm in bleeders), there were relatively large areas in the gobs with possible minimal airflows. This condition appears to have developed from lack of systematic regulation of the airflow across the gobs and appears to indicate the existence of considerably more methane in the probably low flow areas in the gob.
Image of publication Bleeder System in Virgin Area in a Pittsburgh Coalbed MineReport of Investigations - January 1973
Download PDF Document (0.59 MB)
NIOSHTIC2 Number: 10000716
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB-225270, RI 7805, 1973 Jan; :1-8
See Also
Bleederless Ventilation Systems as a Spontaneous Combustion Control Measure in U.S. Coal Mines
Characterization of the 1986 Metal and Nonmetal Mining Workforce
Methane Emission from U.S. Coal Mines, A Survey
Noise Assessment of Stone/Aggregate Mines: Six Case Studies
Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines
Research and Development Contract for Coal Mine Communication System: Volume 1 - Summary and Results of System Study
Research and Development Contract for Coal Mine Communication System: Volume 2 - Mine Visits
Safety Culture Assessment in Underground Coal Mining
Survey of Noise in Coal Preparation Plants
Three Coal Mine Ventilation Studies Using Sulfur Hexafluoride Tracer Gas
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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