轴向力作用下岩柱抗弯刚度的数值解

Numerical solution of bending stiffness of rock column under axial force

基于平截面假定,利用MATLAB程序编写了岩柱在不同轴向力作用下的弯矩曲率计算程序,以得到地下工程中岩(矿)柱抗弯刚度的计算方法和其弹性区和软化区数值特征,最后分析了轴向力对岩柱抗弯刚度和岩爆的影响,结果表明,随着轴向力的增加,岩柱的抗弯刚度基本不变,但抵抗极限弯矩的能力随之加强,而岩柱在岩爆中释放的弯曲应变能也愈大。

Based on the plane section assumption, a MATLAB code is programmed to calculate the relationship between moment and curvature of rock pillars under different axial force. By which, bending stiffness of rock column and its numerical characteristics in elastic and softening zone can be obtained. Finally, the effects of axial force on rock column bending stiffness and rock burst are analyzed and the results show： with the increase of axial force, bending stiffness of rock column basically unchanged, but the capacity to resist limit bending moment increases, and rock piUar in rock burst release of the bending strain energy increases.