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The paper outlines some recent developments of the boundary element method(BEM) that makes it more user friendly and suitable for a realistic simulationin geomechanics, especially for underground excavations and tunnelling. Theinnovations refer to the introduction of isogeometric concepts, elasto-plasticanalysis and the simulation of ground support. The introduction of isogeometricconcepts for the description of the excavation boundaries results in less userand analysis effort, since complex geometries can be modelled with fewparameters and degrees of freedom. No mesh generation is necessary. In order toconsider heterogeneous and inelastic ground conditions a domain discretisationis used but the use of isogeometric methods results in a minimum of usereffort. Efficient methods are also presented for modelling rock bolts. Acomparison of results of test examples with other numerical methods andanalytical solutions confirm the efficiency and accuracy of the proposedimplementation. A practical example with a complex geometry is presented.

Efficient and realistic 3-D Boundary Element simulations of underground construction using isogeometric analysis