That the arched roadway with the ratio of 0.2 between arch rise and roadway width is substituted for rectangular roadway can obviously improve the stress state of roadway su...

• 采用矢跨比为0.；2的圆弧拱巷道代替矩形巷道；可显著改善巷道围岩应力状况；减小巷道围岩变形量；减少围岩塑性屈服区域；加强巷道围岩的稳定性。