基于Fisher判别分析法岩质边坡稳定性评价

Evaluation of Rock Slope Stability Based on Fisher Discriminant Analysis Method

基于岩石边坡稳定性评价方法CSMR体系,建立了边坡稳定性评价的判别分析模型,选用岩体质量、结构面特征、边坡几何条件等方面的综合指标作为判别分析模型的判别因子,以多个岩石边坡工程的稳定状况样本数据进行学习训练,建立了相应的线性判别函数对待判样本进行了预测。分析结果表明,判别分析模型评价边坡稳定性准确度高、误判率低,能够反映CSMR体系各参数对边坡稳定安全系数的影响程度,是一种有效的边坡稳定性评价方法。

On the basis of the Chinese Slope Mass Rating（CSMR） system, a discriminant analysis model for estimating the rock slope stability is established,including combined indice which reflect the factors influencing rock slope stability,such as rock quality,structural faces of rock masses and slope geometry properties. Linear discriminant function is obtained through training a large amount of rock slope enginee ring cases. The results of analysis show that the Fisher discriminant analysis model can accurately reflect the effect of CSMR system factors on slope safety factor,and could be effectively used to predict the safety of rock slope with high accuracy.