Abstract: In response to the splitting failure which is a special engineering geological phenomenon under high in-situ stresses, splitting model based on curve expanding path involving closure effect has been applied. This model is programmed by FISH functions and embedded into FLAC software. Numerical simulation of splitting failure of roadway has been conducted by using FLAC software. The diagrams of splitting failure evolution with respect to the depth and area under different geological conditions have been obtained. The impacts of depth, lateral pressure coefficient, bulk modulus and shear modulus on splitting failure have also been analyzed. The research can offer reliable references to the evaluation of stability of underground structures and the design of support under high in-situ stresses.

Key words: deep level, roadway under high stress, splitting failure, numerical simulation