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A CREEP DAMAGE EQUATION FOR ROCKS

Miao Xiexing Chen Zhida (China University of Mining & Technology,Xuzhou 221008,P.R.China)  
In this paper,based on many experimental results,a creep damage equation for rocks with a creep modulus that can describe the history of damage has been deduced.According to the equation,a creep damage model for rock materials is constructed,and it is shown that the extent of their damage,or damage degree,during creep can be determined by means of simple experiments.
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