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基于不同屈服准则和应力平衡原理,运用DP系列屈服准则作为巷道围岩的塑性条件,推算出矩形巷道边帮的塑性区宽度的解析解,并分析了不同巷道宽度和屈服准则下的塑性区宽度的变形趋势,进一步分析了岩体内摩擦角与粘聚力对塑性区宽度的影响。结果表明,屈服准则的选取对于矩形巷道的塑性区宽度具有重要影响;相同巷道宽度下,DP1准则解最危险,DP4准则解最保守,DP3准则解>DP2解准则解>DP5准则解>MC准则解,其中DP5准则解接近MC准则解,为巷道围岩塑性区提供了一种新算法。
Based on different yield criterion and stress balance principle, the DP series yield criterion is used as the plastic condition of the surrounding rock of the roadway, and the analytical solution of the plastic zone width of the rectangular roadway edge is deduced. The width of plastic zone under different roadway width and yield criterion The deformation trend of the plastic zone is further analyzed. The influence of the friction angle and cohesion of the rock mass on the width of the plastic zone is further analyzed. The results show that the selection of yield criterion has an important influence on the width of plastic zone in rectangular roadway. Under the same roadway width, DP1 criterion solution is the most dangerous, DP4 criterion solution is the most conservative, DP3 criterion solution> DP2 solution solution> DP5 criterion solution> MC criterion Solution, in which the DP5 criterion is close to the MC criterion solution, which provides a new algorithm for the plastic zone of the surrounding rock of the roadway.