距离判别分析法在岩体质量等级分类中的应用

将距离判别分析法应用于岩体质量等级分类问题中,建立岩体质量等级分类的距离判别分析模型,选用单轴抗压强度、岩体声波纵波速度、体积节理数、节理面粗糙度系数、节理面风化变异系数和透水性系数6项指标作为距离判别分析模型的判别因子,以工程岩体实测数据作为学习样本进行训练,建立相应线性判别函数对待判样本进行分类。研究结果表明,距离判别分析模型分类性能良好,预测精度高,回判估计的误判率很低,是岩体质量等级分类的一种有效方法,可以在实际工程中进行推广。

APPLICATION OF DISTANCE DISCRIMINANT ANALYSIS METHOD TO CLASSIFICATION OF ENGINEERING QUALITY OF ROCK MASSES

Based on the principle of Mahalanobis distance discriminant analysis,a classification model of engineering quality of rock masses is established,including six indexes reflecting the engineering quality of rock masses:uniaxial compressive strength,P-wave velocity in rock,volumetric joint countr,oughness coefficients of joints,weathering coefficients and permeability coefficient of joints.Linear discriminant functions are obtained through training a large set of expansive samples.The results show that the classification model of distance discriminant analysis has excellent performance,high prediction accuracy;and can be used in practical engineering.