ANALYTICAL SOLUTION FOR PLASTIC DEFORMATION PRESSURE AROUND A DEEP CIRCULAR OPENING BASED ON GENERALIZED HOEK-BROWN FAILURE CRITERION AND ITS TERNARY NONLINEAR REGRESSION MODEL
ZENG Qianbang1，2，WANG Enzhi1，2，WANG Sijing2，3
(1. State Key Laboratory of Hydroscience and Hydraulic Engineering，Tsinghua University，Beijing 100084，China；2. Department of Hydraulic Engineering，Tsinghua University，Beijing 100084，China；3. Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China)
Abstract：When = 1，a closed-form solution of the plastic deformation pressure in elastic-perfectly plastic surrounding rock obeying the generalized Hoek-Brown failure criterion around a deep circular opening is obtained. Employing the easily-obtained parameters of surrounding rocks，a binary linear regression model for the variation of the maximum plastic deformation pressure with the relative initial stress and the normalized Geological Strength Index(GSI) is established，and so is a ternary nonlinear regression model for the variation of the relative plastic deformation pressure with the relative initial stress，the relative plastic radius and the normalized GSI. The two models can supply a reliable approach for predicting the plastic deformation pressure.
曾钱帮,王恩志,王思敬，. 深埋圆形硐室围岩塑性形变压力的广义Hoek- Brown破坏准则解及其三元非线性回归模型[J]. 岩石力学与工程学报, 2009, 28(S2): 3543-3549.
ZENG Qianbang1，2，WANG Enzhi1，2，WANG Sijing2，3. ANALYTICAL SOLUTION FOR PLASTIC DEFORMATION PRESSURE AROUND A DEEP CIRCULAR OPENING BASED ON GENERALIZED HOEK-BROWN FAILURE CRITERION AND ITS TERNARY NONLINEAR REGRESSION MODEL. , 2009, 28(S2): 3543-3549.
