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  A Block Fall study using the Finite Element Method

  A numerical study of a discontinuous rock mass modeling and the block fall problem is performed using the Finite Elements Method (FEM). The FEM has some difficulties in dealing with complex discontinuous problems involving contacts and elements with very dissimilar sizes. Here, a model using surface-based contact to model the rock joints is discussed, exploring some of the implementation advantages of this method using the Abaqus software. A simple model of a tunnel with three joint planes forming one single block in the roof is studied to test the FEM solution and to establish a comparison with other well-established numerical and analytical methods (using UNWEDGE and 3DEC software). The results from the FEM model were similar in the other methods, although it is still necessary to perform comparisons with more realistic models.

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