岩石可崩性分级的Fisher判别方法

Fisher discriminant method for rock cavability classification

在深入研究Fisher判别法和分析多种岩石可崩性分级评价方法的基础上,选取影响岩石可崩性分级的主要因素:岩石抗压强度、RQD值、节理间距、摩擦角、张开度、地下水作为判别因子,构建岩石可崩性分级的Fisher判别模型。利用国内外岩石可崩性分级实例作为样本进行训练,求出最优线性判别函数,用建立的判别模型对已有的几个分级实例进行判别分级,分级结果与实际吻合程度很高,验证了判别方法的可行性。

Based on the research of the Fisher discriminant method and analysis of several evaluation methods for various rock cavability grading, the following main factors affecting rock cavability classification were selected as discriminant factors to construct Fisher discriminant model of the rock cavability classification, such as compressive strength of rock, RQD value,joint spacing, friction angle, fracture opening and ground water. The domestic and foreign rock cavability classification examples were used as training samples to work out the optimal linear discriminative functions, and the established discriminative models were used to classify several available samples, the classification result is in good agreement with actual condition and the feasibility of the discriminative method was verified..