More and more attentions have been paid to the problem of the shear failure in the conventional straight rockbolt support for underground excavations. Different bolting innovations have been tried over the years. The bent rockbolt with promise is a new mean of rock support. Through numerical simulation software, the shear characteristics of the bent rockbolt is analyzed. Three-dimensional numerical models of the bent rockbolt and the straight rockbolt are established. both of which are subjected to a shear displacement of rock mass. Their stress and deformation characteristics results show that stress concentration easily occurs at the intersection point of anchored portion and non-anchored portion along the bolt. In the case of the mises equivalent stress, the bent rockbolt has a smaller one than the straight rockbolt under the same shear displacement of rock mass. So the bent rockbolt is not easy to be damaged and can better adapte to the shear damage of rock mass.
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