Influence of Base-Angle Bolt Support Parameters and Different Sections on Overall Stability of a Roadway under a Deeply Buried High Stress Environment Based on Numerical Simulation

Strengthening the base-angle of a roadway can have beneficial impact on its overall stability, but specific optimal parameter selection range is still unclear. Fast Lagrangian Analysis Continua 3D (FLAC3D) software used to carry out stability analysis 5 kinds models with different section shapes under conditions no support and bolt angles, simulation verification carried actual working Sanshandao Gold Mine. The conclusion as follows: without support, self-stability tri-centric arch best, that rectangular worst. When dip angle between 15° 45°, better supporting effect be obtained established sections. In straight wall circular Mine, best when 15°. However, changing length bolt, even if increased certain extent, will decrease structure. This paper provide reference for tunnel bottom corner parameters.