SENSITIVITY ANALYSIS OF MODEL PARAMETERS AND υ-SVR MODEL OF SLOPE DEFORMATION DUE TO EXCAVATING FROM OPEN-PIT TO UNDERGROUND MINING
WANG Yunfei1，2，ZHENG Xiaojuan3
(1. Civil and Environment Engineering School，University of Science and Technology Beijing，Beijing 100083，China；2. State Key Laboratory of High-efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing，Ministry of Education，Beijing 100083，China；3. Jiaozuo Teachers College，Jiaozuo，Henan 454000，China)
Abstract：Based on the improved support vector regression(u-SVR) principle，the open-pit mine slope deformation u-SVR model is established which represents the nonlinear variation rule due to the disturbance of excavation from open pit into underground mine. u-SVR model is applied to Xingshan iron mine excavating from open pit to underground mining. The results show that the forecast value which is close to true value and calculation is convenient，and the validity of the improved support vector regression principle is verified by studying the open-pit slope nonlinear deformation rule with virtue of the secondary mining perturbations. The sensitivity of the parameters is analyzed，intuitively reflecting the effect of C，u on mean absolute error(MAE) and the number of support vectors，and the reasonable ranges of the parameters C，u are determined，that is，[1 000，5 000] for parameter C. The interval is larger，but the effect of parameter C on the generalization performance should be considered when selecting parameter C；for parameter u = [0.028，0.125] is a rather reasonable range.
王云飞,郑晓娟. 露天转地下边坡变形u-SVR模型及参数敏感性分析[J]. 岩石力学与工程学报, 2010, 29(S1): 2902-2907.
WANG Yunfei1，2，ZHENG Xiaojuan3. SENSITIVITY ANALYSIS OF MODEL PARAMETERS AND υ-SVR MODEL OF SLOPE DEFORMATION DUE TO EXCAVATING FROM OPEN-PIT TO UNDERGROUND MINING. , 2010, 29(S1): 2902-2907.
