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Mining Publication: Assessing the Methane Hazard of Gassy Coals in Storage Silos
Keywords: Coal Gas emissions Methane Silos
Original creation date: January 1981
Authors: JC LaScola, JE Matta, FN Kissell
Report of Investigations - January 1981
Download PDF Document (0.38 MB)
NIOSHTIC2 Number: 10002015
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8525, 1981 Jan; :1-9
The Bureau of Mines investigated coal storage silos to determine how gassy coal must be for methane accumulations in a silo to become hazardous and where such accumulations are likely to occur. Methane concentrations were measured in the open space above the stored coal pile, in the pile, and in the reclaiming area. No methane layering was found in closed-top silos. Reclaiming areas were as gassy as the top part of the silos. Coal samples were collected from the conveyors entering the silos in order to assess the gassiness of the coal. No simple correlation was found between the gassiness of the coal stored and the measured methane concentrations. However, at mines where the average 24-hour gas emissions from the conveyor belt samples was 14 ft3/ton or more, fans or open tops were used. It appears that a large fraction of the methane released during storage remains in the void space between the coal particles.
Image of publication Assessing the Methane Hazard of Gassy Coals in Storage SilosReport of Investigations - January 1981
Download PDF Document (0.38 MB)
NIOSHTIC2 Number: 10002015
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8525, 1981 Jan; :1-9
See Also
The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design
Measuring the Gas Content of Coal: A Review
Methane Absorption in Oil Shale and Its Potential Mine Hazard
Methane Diffusion Parameters for Sized Coal Particles: A Measuring Apparatus and Some Preliminary Results
Methane Emission Rate Studies in a Northern West Virginia Mine
Methane Emissions from Gassy Coals in Storage Silos
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
A Review of the Mechanisms of Gas Outbursts in Coal
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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