Abstract
Surrounding rock in deep mine will exhibit discontinuous large deformation characteristics under high geo-stress, so the rationality of the anchor-net support parameters will directly affect the tunnel support effect. In this paper, the relationship between wall rock around tunnel in deep mine deformation and support parameters of deep roadway is studied by FLAC numerical simulation. The travelling roadway of 11501 coal face in a mine is taken as the research background. Five bolt lengths (2.4m,2.6m,2.8m,3.0m and 3.2m) and 5 kinds of the inter-row spacion of anchor rod (0.6m×0.6m, 0.65m×0.65m and 0.7m×0.7m, 0.75m × 0.75m, 0.8m × 0.8m) are designed based on the initial support scheme of the tunnel. The effect of 25 combinations of bolting support are analyzed. After,6 kinds of anchor cable length schemes (5.5m,6m,6.5m,7m,7.5m,8m) are designed for research. Finally, the coupling relationship between the support parameters of the anchor (cable) and the deformation of the surrounding rock is obtained. The research results provide reference for the scientific design of the roadway support under similar conditions.
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