基于莫尔圆的煤岩体σ-τ一元线性回归模型检验

发布时间：2018-06-27 08:06

  本文选题：煤岩体强度 + 莫尔强度包络线　； 参考：《煤矿安全》2016年11期

【摘要】：测量岩石的黏聚力和内摩擦角是非常重要的,而测量得出的数值可信度到底有多高也是值得关注的。通过取若干组试件达到极限破坏状态时的法向力σ和切向力τ,建立σ关于τ的一元线性回归方程,并编写了相应程序解得最佳c、φ值,进一步对回归方程进行检验,最终发现当取显著性水平α≥0.005时,τ与σ之间有线性关系,当取显著性水平α≤0.001,无线性关系,结果表明得到的φ,c值都是在一定的可信度下。由此可见必须选取最合适的可信度,以得到最佳的c、φ值。
[Abstract]:It is very important to measure the cohesive force and the internal friction angle of the rock, and it is worth paying attention to how high the reliability of the measured value is. By taking some groups of specimens to reach the ultimate failure state, the linear regression equation of the normal force and tangent force is established, and the optimum C, Phi value and the value of the corresponding program are compiled. One step is to test the regression equation. Finally, it is found that when the significant level is equal to 0.005, there is a linear relationship between the tau and the sigma. When the significant level is equal to < 0.001, there is no linear relationship. The results show that the obtained C values are all under certain reliability. Thus, the most suitable reliability must be selected to get the best C and phi value.
【作者单位】： 重庆大学煤矿灾害动力学与控制国家重点实验室;重庆大学资源及环境科学学院;
【基金】：重庆大学煤矿灾害动力学与控制国家重点实验室自主课题重点资助项目(2011DA105287-ZD201504)
【分类号】：TD315
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本文编号：2073253