软岩非定常蠕变实验与分析

Rheological characteristic is one of the most important mechanical characteristics of rock. It controls the creep deformation. Jinchuan mine rock is remarkable rheological characteristic. Therefore，the study on creep rule of the ore-rock at a mining region is an important base work. For this reason，a set of creep experiments was done to study the rheological characteristic of flabby and intricate ore-rock at that mine. It use the various stepwise circular uniaxial compression creep test. As scientific analysis, we considerate the influence of loading history on rock specimen deformation, and the result reflect truly the intrinsic rheological mechanical behaviors of rock specimen. Burgers creep model was adopted to reflect the characteristic of rock creep. The results show that One –dimensional non-stationary viscoelastic creep equation of rock is given. The results show that non-stationary viscoelastic constitutive model more accurately reflects the deformation capability of rock than the constant one.