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Mining Publication: Direct Method Determination of the Gas Content of Coal: Procedures and Results
Keywords: Explosions Gas measurement instruments Methane
Original creation date: January 1981
Authors: WP Diamond, JR Levine
Report of Investigations - January 1981
Download PDF Document (1.79 MB)
NIOSHTIC2 Number: 10001972
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8515, 1981 Jan; :1-36
The explosion hazard of methane-air mixtures has become an increasingly serious mine planning problem, and an advance assessment of methane gas potential can therefore be essential for a safe and economic mine development program. As part of its coal mine health and safety program, the Bureau of Mines has developed a simple, inexpensive test to measure the methane content of coal samples obtained from exploration cores. The gas content of coal per unit weight as determined by the direct method test can be used as a basis for a preliminary estimate of mine ventilation requirements, and to determine if degasification of the coalbed in advance of mining should be considered. Since the Bureau began measuring the gas content of coal samples in 1972, experience has led to equipment and procedural changes, the most significant of which has been the development of a ball mill for crushing the coal sample to release the residual gas at the end of the desorption test period. This revised procedure replaces the crushing box and graphical methods described in earlier Bureau publications. The results of 583 direct method tests are summarized in tabular form. These results include data on the gas content of 125 coalbeds in 15 states.
Image of publication Direct Method Determination of the Gas Content of Coal: Procedures and ResultsReport of Investigations - January 1981
Download PDF Document (1.79 MB)
NIOSHTIC2 Number: 10001972
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8515, 1981 Jan; :1-36
See Also
Attenuation and duration of seismic signals generated from controlled methane and coal dust explosions in an underground mine
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
Evaluation of New Methods and Facilities to Test Explosion-Resistant Seals
Explosion Prevention in United States Coal Mines
Historical Development of Technologies for Controlling Methane in Underground Coal Mines
Methane-Air Detonation Experiments at NIOSH Lake Lynn Laboratory
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Rapid (Grab) Sampling During Full-scale Explosions - Microscopic and Analytical Evaluation
Remote Methane Sensors
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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