The results show that the classification model of distance discriminant analysis has excellent performance, high prediction accuracy;and can be used in practical engineering.

• 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。