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Mining Publication: Pressure Monitoring and Observed Effects of Mining at the Oak Grove, AL, Coalbed Degasification Pattern
Keywords: Explosives safety Gas emissions U.S. Bureau of Mines
Original creation date: January 1989
Authors: DC Oyler
Report of Investigations - January 1989
Download PDF Document (1.53 MB)
NIOSHTIC2 Number: 10007352
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9282, 1989 Jan; :1-27
The U.S. Bureau of Mines and the United States Steel Corporation evaluated the progress of methane drainage at the Oak Grove, Alabama, degasification pattern. Coalbed pressures were monitored between December 1981 and November 1985. Formation pressures, in the lower bench of the Mary Lee coalbed, were reduced from 400 lbf/in2(ga) in 1977 to 50 lbf/in2(ga) in November 1985. Gas contents of coal cores obtained from monitor wells were compared with coalbed gas contents measured in 1976. Data indicated a 48- to 56-pct reduction within the pattern and a 29-pct reduction at a point 500 ft outside the pattern. The effect of the advance of a section of the Oak Grove Mine on changes in gas and water production rates in the pattern was evaluated. Gas production increases were noted in 12 wells; water production decreases were noted in 6. The times of initial influence indicate the presence of a zone of high permeability within the pattern. This zone correlates well in orientation and location with a fracture zone mined through at the mine. The existence of such fracture zones could have a significant effect on productivity of individual coalbed methane wells.
Image of publication Pressure Monitoring and Observed Effects of Mining at the Oak Grove, AL, Coalbed Degasification PatternReport of Investigations - January 1989
Download PDF Document (1.53 MB)
NIOSHTIC2 Number: 10007352
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9282, 1989 Jan; :1-27
See Also
Analysis and Prediction of Longwall Methane Emissions: A Case Study in the Pocahontas No. 3 Coalbed, VA
The Availability of Primary Copper in Market Economy Countries: A Minerals Availability Appraisal
Coal-Dust Explosion Tests in the Experimental Mine 1919 to 1924, Inclusive
Evaluation of the Relative Importance of Coalbed Reservoir Parameters for Prediction of Methane Inflow Rates During Mining of Longwall Development Entries
History of the Mining Program
Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
Predicting Materials' Ease of Combustion: Development of a Simple Test Method
Proceedings of Thru-The-Earth Electromagnetics Workshop
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
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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