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The National Institute for Occupational Safety and Health (NIOSH)





Mining Publication: Methane Accumulations in Coal Mine Roof Cavities
Keywords: Methane Methane control
Original creation date: January 1978
Authors: RP Vinson, ED Thimons, FN Kissell
Report of Investigations - January 1978
Download PDF Document (0.61 MB)
NIOSHTIC2 Number: 10002521
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8267, 1978 Jan; :1-15
The Bureau of Mines investigated the presence and extent of methane accumulations in mine roof cavities using a full-scale mine model. Methane was released at a constant rate into the roof of a cavity built onto a 700-ft wind tunnel. Two box-shaped roof cavities were used in the study: one had a volume of 114.7 cu ft; and the other had a volume of 57.3 cu ft. Methane concentration was measured at 28 sampling points in the cavities using 21 different combinations of gas emission rates and air velocities. Brattice hung in the cavity helped reduce methane concentrations without auxiliary ventilation. It was also found that the effective ventilation rate increased by a factor of 40 in the large cavity and by a factor of 20 in the small cavity when air velocity was increased from 100 to 600 ft/min.
Image of publication Methane Accumulations in Coal Mine Roof CavitiesReport of Investigations - January 1978
Download PDF Document (0.61 MB)
NIOSHTIC2 Number: 10002521
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8267, 1978 Jan; :1-15
See Also
Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
Guidelines for the Control and Monitoring of Methane Gas on Continuous Mining Operations
Investigation of Methane Occurrence and Outbursts in the Cote Blanche Domal Salt Mine, Louisiana
Methane and Dust Control by Water Infusion: Pittsburgh Coalbed (Fairview, W. Va.)
Methane Content of Gulf Coast Domal Rock Salt
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Prediction of Longwall Methane Emissions and the Associated Consequences of Increasing Longwall Face Lengths: A Case Study in the Pittsburgh Coalbed
Remote Methane Sensors
Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
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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