The problem about the stability of tunnel surrounding rock is always an important research object of geotechnical engineering, and the right or wrong of the result from stability analysis on surrounding rock is related to success or failure of an underground project. This paper mainly introduces algorithmic procedure of FLAC, meshed partition, data importation and resulting analysis, the stability of surrounding rock is judged by the stress , displacement and maximal unbalanced force and the change rate of displacement of arch with the steps, taking the Tieshanping tunnel as an example. It com...
