深部岩体非线性蠕变变形预测的研究

Study on prediction for nonlinear creep deformation of deep rocks

利用蠕变实验数据进行数值模拟,得出了深部软岩巷道围岩在高地应力作用下的蠕变方程,建立了蠕变与时间和应力的定量关系.通过计算得到了应力差-蠕变曲线;时间-应力差-蠕变三维曲面.得出了地应力差是引起蠕变的主要因素,对深层软岩巷道进行了变形仿真分析,并实现了与实测变形的对比.

The creep equation of soft rock tunnel surrounding rock under the action of high ground stresses in deep mining was fitted by data obtained from creep experiments. The quantitative relationship among creep, time and stress deviation was found. The stress deviation-creep curves and time-stress deviation-creep surface were gotten by scientific calculation, and it is proved that ground stress deviation is the main reason for creep of rock in deep mining. The deformation of soft rock tunnel surrounding rock in deep mining was calculated and the results were compared to the actual situation as an important reference to soft rock engineering.