EMR characters of thin coal seam workface
Abstract：The EMR technology and equipment is applied to monitor the thin coal seam workface and the EMR character is deeply analyzed.The result shows that if the gob-side entry retaining mode is adopted,the intensity and fluctuation of EMR in the upper lane are higher than lower lane owing to the influence of upper section adjacent goaf.EMR increase before weighting and decrease after weighting.During the process of mining,EMR present evidence periodicity.Rock burst happen after a short time of the peak of EMR in thin coal seam,which is different from thick coal seam.In thick coal seam,EMR increase before rock burst,after a period of time it decrease and stand in low value,then rock burst happened.When EMR technology is applied to analyze the thin coal seam workface stress and predicted rock burst,in order to raise veracity,the characters must be considered.
Keywords：electromagnetic radiation（EMR）thin coal seamrock burst
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 406-410 )