Study on Bolt Support Effect Based on Hoek Brown Strength Criterion
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.
tunnelsurrounding rock stabilityboltnumerical simulationconvergence constraint method
万方数据
维普
