空间轴对称极限平衡应力数值分析

NUMERICAL ANALYSIS OF SPACE AXISYMMETRIC LIMITING EQUILIBRIUM STRESS

以莫尔－库仑准则和全塑性假设为基础的空间轴对称问题的基本方程化为无量纲形式，利用比较精确的应力方程数值积分方法对空间轴对称问题的基本方程作了数值解，编制了程序ＣＡＬＣ，在此基础上，将立井围岩视为松散介质，进行模拟计算，得出了井壁压力不是直线型的，而是曲线型的；别氏公式在浅部适用性较好，而在深部不适用等结论，并对滑移线形状进行了描述．

The basic equation of space axial symmetry is translated into dimensionless form based on Mohr Coulomb criterion and full plastic assumption. The numerical solution for the basic equation of space axial symmetry is obtained by a more precise stress equation, namely the numerical integration method, and a program, CALC, is provided. Based on this method, analogue computation is made, in which the surrounding rock of vertical shaft is regarded as a loose medium. A conclusion is drawn. i e the pressure on the shaft wall is not linear, but curvilinear. The B Г formula is applicable in shallow shaft but not in deeper shaft. The shape of slip line is also described.