Abstract：According to the rock reinforcement in geotechnical engineering，the study on rock anchorage simulation by numerical manifold method (NMM) has been conducted；and the corresponding numerical simulation blocks have been compiled on the basis of the original code. Two examples are used to validate the correctness of the newly developed model. Based on the works accomplished above，the excavation of an underground opening with laminated surrounding rock mass is simulated by NMM；and the deformation characteristics are analyzed. The results show that the displacements on the two sides of the weak planes in the upper part of the surrounding walls behave discontinuously，which are reasonable compared to the actual situation. When the surrounding rock is reinforced，its displacement tends to be more uniform，and decreases to some extend. On the two sides of the weak plane the discontinuous deformation of the surrounding rock decreases more distinctly.
