Based on the theory of surrounding rock reinforcement,this paper studies and analyzes the quantification of bolt support effect through numerical simulation,establishes the equivalent conversion relationship between bolt density and GSI,so as to quantify the bolt support effect,and obtains the following conclusions:①The higher the anchor density,the higher the GSI score,and the greater the lifting effect on the surrounding rock;② When the density of anchor rods is constant,reducing the row spacing of anchor rods has a more significant effect on improving the strength of surrounding rock than reducing the spacing of anchor rods;③The lifting effect of bolt support on hard rock is not significant,but the increasing effect on soft rock is very obvious.The softer the rock,the more obvious the strengthening effect of bolt.
关键词
隧道/围岩稳定/锚杆/数值模拟/收敛-约束法
Key words
tunnel/surrounding rock stability/bolt/numerical simulation/convergence constraint method
维普
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