A numerical approach for simulation of generation and progress of new cracks clue to shear and tension failure in the matrix blocks of jointed rock masses is proposed by using distinct element method (DEM). As the application of the proposed approach, changing the depth of opening and geometrical distribution of the existing discontinuities carries out excavation simulations of deep underground opening in the jointed rock masses. Furthermore, the effects of cable bolts on controlling deformational behaviour of opening and movements of key blocks are also discussed.
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