Experimental study of freezing temperature field in uncovering outburst coal seam in cross-cut
Abstract：Aiming at a new-presented proof-outburst method by injecting liquid and freezing in uncovering coal seam in cross-cut,designed the coal freezing experimentation in cement trough model,analyzed the relation between the coal temperature,mechanical property and freezing time.Through the coal freezing experimentation in cement trough model,it shows that the freezing section,whose radius is R,is revolved around the freezing tube centre.The formed frozen coal column is patulous with the freezing time.The coal,gas,and water in the trough is frozen into the firm freezing structure finally,so the uniaxial compression strengths and elastic modulus of coal models and the other mechanical property are greatly increased.Through the experiment it proved the formation of freezing area in the cross-cut working face.The more near to the freezing tube,the more low the coal temperature is,reaching to the frozen control temperature of-15 ℃ for proof-outburst.
Keywords：uncovering coal seam in cross-cutfreezing areainjecting liquid and freezingcoal and gas outburst
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)