Abstract: Most tunnels of Gaofeng Mining district are supported by split-set bolt. Because of corrosion split-set bolt failed，which is caused by tunnel condition and poor anti-corrosion measure. The secondary support is necessary, which increases supporting cost and labor intensity.  The advantage of glass fiber reinforced plastic (GFRP) anchor is light weight, high strength, non-corrosion and high fatigue limit. The supported by split-set bolt and GFRP anchor in Gaofeng mine was analysis by FLAC^3D. The deformation of tunnel, rock mass stress field, plastic zone and safety were compared under the same support condition. Based on the analysis of support effect by FLAC^3D, the research indicates that GFRP anchor can be used instead of split-set bolt in Gaofeng mine.

Key words: Split-set bolt, GFRP anchor, Numerical simulation, Tunnel support