Determination on Range of Stress-relaxed Area in Goaf of Low Permeability Single Coal Seam
ZHANG Ming-jie
FU Shuai
TAN Zhi-hong
Abstract：According to the features of difficult gas pre-drainage and inefficient outbursts control in a low permeability single coal seam,in order to accurately determine the stress-relaxed area and realize fast driving in the stress-relaxed area of low permeability single coal seam,taking Guhanshan Coal Mine as an example,this paper used many methods to determine the stress-relaxed area.The results showed that according to the determination of residual gas content and pressure in the coal seam of adjacent goaf,in combination with numerical simulation,the range of the stress-relaxed area without outburst danger was 8 m,and in the stress-relaxed area,gas emission initial speed and value of drilling cuttings weight as well as desorption index for drilling cuttings were all below the critical value,which illustrated the stress-relaxed area had no outburst danger,the fast and safe driving could be realized in the stress-relaxed area of low permeability single coal seam.
Keywords：coal and gas outburstresidual gas contentresidual gas pressurestress-relaxed area
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 25-28 )