Abstract: The layer-deposited rock has obvious anisotropic characteristics. Traditional isotropic model cannot describe the asymmetric damage caused by  roadway construction accurately. In this paper, the FLAC^3D calculation scheme of anisotropic elastic-plastic model is derived based on the SMP (spatial mobilized plane) theory. The secondary development of anisotropic elastic-plastic model is implemented though embedding dynamic link library(dll) file into FLAC^3D. The availability of this model was verified through designing simulation scheme. Analysis of roadway simulation under the anisotropic condition showed that the distribution of forces on anchors was asymmetric. When the anchors in failure zone were lengthened, the plastic zone decreased and the anchor force tended to be homogeneous. Field application in roadway reveals that anchor bolt support in critical zones based on anisotropic analysis is feasible.

Key words: roadway support, SMP theory, anisotropic elastic-plastic, secondary development in FLAC^3D, anchor support optimization