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在岩石应变软化变形全过程的损伤统计本构模型基础上,根据单轴压缩应力应变全过程曲线,进一步明确了本构模型中分布参数的物理意义和实际意义,提出了模型参数的确定方法并通过试验验证了该方法的合理性,在此基础上进一步分析了不同均质度岩石的临界敏感性.结果表明,通过该方法确定的岩石均质度综合反映了岩石峰前聚能和峰后释能的能力,比以往的计算和拟合过程更简单,物理意义更加明确;随着均质度的增加,岩石临界行为特征越来越明显,临界敏感性增强,对于岩爆岩石来说,岩爆倾向性增强.通过确定的岩石均质度可以方便的定量比较不同岩石的临界敏感性和岩爆倾向性,便于更好的指导实际工程和提前采取预防措施.
Based on the damage statistical constitutive model of rock strain softening deformation and the whole process of uniaxial compressive stress and strain curves, the physical and practical significance of the distribution parameters in the constitutive model is further clarified and the method of determining the model parameters The rationality of this method is verified by experiments, and the critical sensitivity of rocks with different homogeneous degree is further analyzed.The results show that the rock homogenization degree determined by this method comprehensively reflects the peak energy before peak and after peak The capability of energy release is simpler and has more physical meaning than previous calculation and fitting processes. With the increase of the homogenization degree, the critical behavior of rocks becomes more and more obvious and the critical sensitivity increases. For rock-burst rocks, The tendency of rockburst is enhanced.The critical sensitivity and rockburst tendency of different rocks can be conveniently and quantitatively compared through the determined rock homogenization degree so as to better guide the actual engineering and take precautionary measures in advance.