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针对岩体质量等级分类是岩石力学学科研究的热点和难点问题,将非线性主成分分析应用于岩体质量等级分类问题中,构建了岩体质量等级分类的非线性主成分综合评价模型,并选用岩石质量指标、完整性系数、单轴饱和抗压强度、纵波波速、弹性抗力系数和结构面摩擦因数6项指标作为聚类和判别指标,以实测数据进行分类和判别。结果表明,该评价模型有效,预测精度高,可供借鉴。
The classification of rock mass quality is a hot and difficult issue in the field of rock mechanics. The nonlinear principal component analysis is applied to rock mass quality classification, and a nonlinear principal component comprehensive evaluation model of rock mass quality classification is established. Rock mass index, integrity coefficient, uniaxial saturated compressive strength, longitudinal wave velocity, elastic resistance coefficient and structural surface friction coefficient were selected as the clustering and discriminant indexes, and the data were classified and discriminated according to the measured data. The results show that the evaluation model is effective and predictive accuracy is high and can be used as reference.