Moisture Content Affected to Initial Gas Emission Velocity of Different Ranking Coal
Abstract：In order to improve the prediction accuracy of the coal and gas outburst in mine, measurements were conducted on the initial gas emission velocity of the anthracite coal, coking coal and long flame coal with different moisture contents after dry treatments. The resuits showed that the moisture would all have the influences to the gas initial emission velocity of the anthracite coal, eoking coal and long flame coal. The higher moisture content of the coal samples in different ranking coal, the lower initial gas emission velocity would be. The gas initial emission velocity would be decreased with the moisture content increased in index. The gas adsorption value of the coal sample with the moisture reduced was the fundamental causes to reduce the gas initial emission velocity. The moisture content would have highest influences to the gas initial emission velocity of the anthracite coal, the medium influences to the long flame coal and the lowest influences to the coking coal. The reason was the different pore features of different ranking coal.
Keywords：moisture contentgas initial emission velocityoutburst seampore featuresadsorption value
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 62-65 )