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Abstract Based on little convergence deformation and short service time of Cilinshan 9103 roadway, support effect of the roadway was simulated by FLAC3D under different bolt support parameters to ensure low supporting cost under safe use. The result showed that the most optimized support parameters were pretightening force 30 kN, inter-row spacion 1 000 mm×1 200 mm, diameter 20 mm, length 2.2 m, anchor cable φ18.9 mm×5 300 mm, distance between rows3 600 mm, with good support effect, surrounding rock displacement amount increased in safe allowance range, the roadway support material consumption proportion exceeded 50%, with obvious low support cost.
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