| In the article, according to stability of tunnel in Lu jia tuo mine of Kailuan,on the basis of rheology,through the physical experiment,the basic mechanical parameter and the creep parameter of coal and rock were ascertained; by analyzing creep theory, actual creep constitutive model of Lu jia tuo mine was established; through numerical simulation,FLAC3D software forecast creep law of adjacent rock of tunnel in Lu jia tuo mine; according to the analysis mentioned above, the theory that rock had gradient compound board characteristic in mechanical properties was proposed, and the rock conformed to creep law; through Burgers model, actual creep model that suited LujiaTuo Mine was established; by analyzing creep displacement and creep speed of adjacent rock of tunnel, large deform in bottom of LuJiaTuo tunnel has been discovered, therefore, to control bottom of tunnel was extremely important.
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