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中文摘要：
岩石力学中常用的流变模型有黏弹性模型、黏塑性模型等，而西原体模型是目前比较完善、流行的流变模型，它能够完整地描述衰减蠕变、稳定蠕变与不稳定蠕变几种蠕变模型。利用该模型理论对深埋地下洞室围岩的流变进行了力学分析，得出在考虑围岩流变的情况下，围岩的位移随着时间的增长不断变大，而围岩的位移速率则是在洞室刚开挖时最大，随后逐渐变小并趋于某一定值等结论。
英文摘要：
The creep models we often used in rock mechanics contained viscoelastic model, viscoplastic model and so on. Moreover, the visco-elastoplastic model is more popular and perfect than other models today, it could describe decayed creep model, stabilization creep model and some precarious creep models perfectly. Therefore in this paper, the theology of rock around tunnels is studied with the visco-elastoplastic model, and on the basis of the mechanics analysis, some regularity of deformation of surrounding rock is obtained, for example, considering the creep of the surrounding rock, its displacement increases with the time passing, while its rate of displacement gets to the top, then appears a monotone decrease with time and reaches a constant finally.
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