中文摘要：

利用JQ200岩石剪切流变仪,对西藏邦铺矿区花岗岩进行室内剪切流变试验,得到不同应力状态下花岗岩的剪切流变曲线。基于试验曲线,对花岗岩的剪切位移规律和平均流变速率进行深入的分析,确定花岗岩剪切流变的长期抗剪强度,并与瞬时抗剪强度作比较。采用五元件黏弹性剪切流变模型对花岗岩流变的黏弹性流变曲线进行拟合,得到模型的流变参数。然后,提出一个新的黏塑性模型（VR模型）,将其与五元件黏弹性剪切流变模型串联起来,建立新的岩石黏弹塑性剪切流变模型。同时,用新的岩石黏弹塑性剪切流变模型对花岗岩流变全程曲线进行拟合。模型拟合结果和试验结果比较表明：新模型具有正确性和合理性。

英文摘要：

The laboratory shear rheological experiments were carried out for the granite in Bangpu mining area of Tibet by using the JQ200 shear rheometer, and the rheological curves in different stress states of granite were obtained. Based on these experimental curves, the shear displacement law and average shear rheological rate of granite were analyzed deeply, and therefore the long-term shear strength parameters of granite were determined, which were also compared with the parameters of the instantaneous shear strength. Five-component viscoelastic shear rheological model was used to fit the viscoelasticly rheological curves of granite, and the rheological parameters of the model were obtained. Then a new viscoplastic rheological（VR） model was put forward. When the new one is connected with five-component viscoelastic shear rheological model in series, a new viscoelastoplastic shear rheological model of rock was established accordingly. At the same time, the whole process rheological curves of granite were fitted by using the new viscoelastoplastic shear rheological model of rock. The comparison between the results of model and experiment shows that the new model is right and reasonable.