井壁可缩层合理设计位置的数值模拟分析

Based on the numerical simulation analysis of the shaftlining damaged cases in Huadong mine areas, the result indicates that the main cause for damage is vertical additional force. Based on the theory of pile foundation, by considering the relative displacement in shaft lining and strata, the additional forces and the axial stress in shaft lining is obtained. The settings of compressible tie-ins to weaken the vertical attached power and the section axial stress of shaft wall, and optimization principle of compressible tie-in are brought forward; It is shown that the compressible shaft wall can reduce the additional force and the section axial stress of shaft wall effectively; Compared to the single compressible tie-in, two compressible tie-ins setting is more effective. The results can provide a theoretical basis for design, and it has important guidance meaning to design compressible shaft wall reasonably.