竖井井壁竖向附加力的理论计算方法

Theoretical study on shaft wall of vertical additional force

从弹性力学的空间轴对称问题出发,从理论上推导建立了竖井竖向附加力的应力表达式.分析该应力表达式可知,在竖向附加力作用下,井壁所受的径向、环向压应力值均为零,竖向附加力对井壁的作用主要体现为轴向压应力,且轴向应力在沿井壁厚度方向几乎无变化,因而可以将作用在井壁外侧的竖向附加力等效为作用在井壁横截面上的均布力.利用该应力表达式对某铁矿竖井井壁竖向附加力进行了计算,得到了井壁应力状况.

Based on the elasticity theory of spatial axial symmetry question, the paper established the stress formula for vertical additional force theoretically. The stress expression analyses show that at ef- fect of vertical additional force, the hoop compressive stress and radial compressive stress of shaft wall are both zero, the vertical additional force imposed on the shaft wall is mainly axial compressive stress, and the axial compressive stress along the wall is almost no change in the thickness direction, so the vertical additional force can be equivalent to uniform force which was imposed on the cross section of shaft wall. Finally, the vertical additional force of shaft wall was calculated using the above stress for- mula, and its wall stress condition was obtained.