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本文通过综合分析大量三轴实验数据发现:不同成因和结构的岩石,在不同受力状态和不同加载方式的条件下,强度曲线之间具有显著的形态相似性;在岩石破坏面上的抗剪强度系数A和正压强度系数B,内摩擦系数f和内聚力系数K之间存在高度相关性;在对数坐标中岩石强度图具有直线平行排列特性。经过幂回归分析计算得到了经验公式。只要测得岩石单轴抗压强度R_c,就可以求得任意给定正压强度值情况下的抗剪强度值,简而易行地确定岩石强度图。这将大大简化确定岩石强度图的实验工作和减少用排列组合方法确定内聚力C与内摩擦角φ的计算工作量。
Through a comprehensive analysis of a large number of triaxial experimental data, it is found that rocks with different genesis and structure have significant morphological similarities between strength curves under different stress conditions and different loading modes. Shear resistance The strength coefficient A and the positive pressure intensity coefficient B, the internal friction coefficient f and the cohesion coefficient K have a high degree of correlation, and the logarithm coordinates have a straight line parallel arrangement characteristic. After the power regression analysis calculated the empirical formula. As long as the rock uniaxial compressive strength R_c can be measured, the shear strength value under any given positive pressure value can be obtained and the rock strength diagram can be easily and simply determined. This will greatly simplify the experimental work of determining the rock strength map and reduce the computational effort to determine the cohesion C and the internal friction angle φ by the permutation and combination method.