Creep experimental and theory model on coal containing gas under the condition of unloading confining pressure
Abstract：Using self-developed triaxial creep and seepage experimental installation,the creep experiment of coal containing gas under unloading condition were studied.The coal specimen was taken from gas outburst coal seam 7 of Datong No.1 Coal Mine which belong to Songzao C ＆ E Co.,Ltd.According to the experiment result,the viscoplasticity constitutive relation and gas flowing,considering the Klinkenberg effect,were discussed too.The results show that unloading can accelerate the failure,so it can lead to rock burst and gas outburst.The macrofissure induced by unloading can increase the gas flow velocity significantly.The modified Chaboche viscoplasiticity constitutive relation can describe the short term creep failure of coal containing gas.A series of parameters can be educed from the experimental data.The change law of gas flux,apparent permeability and spondylolisthesis coefficient were achieved from the study about unloading creep and seepage test
Keywords：coal containing gasunloading creepviscoplasticityKlinkenberg effect
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)