A non-linear theological model has been applied to simulate the time-dependent behaviour of underground roadway in mine. In the calculation, FEM technique is used with parameters assumed on the basis of test results of sample rock. The calculated results are compared with those of field measurement conducted at Fukazawa and Matsumine mines. The roadways considered in this study are U-shaped, and supported by rock bolts in case of Fukazawa mine. The calculated results of convergence and extension in the rock wall indicate a fairly good coincidence, at least in qualitative means, with measured ones. It can be said that the model showed a good potential for application purpose. However, for quantitative discussion, more accurate estimation of rock pressure and strength of rock mass may be inevitable.