弹塑性变形条件下围岩-支护相互作用全过程解析

围岩-支护作用机制是正确认识支护结构对围岩进行有效支护作用的基础理论问题。根据开挖面的空间效应及Hoek拟合方程计算了某工程实例的巷道顶板径向位移沿巷道纵向剖面方向分布的曲线，建立了围岩-支护耦合作用的力学模型，进而建立了描述巷道顶板径向位移与力学模型中的虚拟支护力的关系的数学模型。通过对数学、力学模型的解析与分析，研究了围岩-支护在其相互作用的全过程中的相互作用路径。在此基础上，对弹塑性变形阶段围岩-支护的相互作用原理给出了最新的认识。应用该研究成果，对某工程实例进行了支护作用效果的计算与分析研究。本文的研究成果实现了对围岩-支护耦合作用的全过程解耦，可以对围岩-支护的相互作用进行实时地预测或再现。

Analysis of complete process of interaction of surrounding rock and support under elastioplastic deformation condition

The principle of coupled action of surrounding rock and support is a basic theory to accurate reveal that the tunnel is effectively supported by support structure.The longitudinal deformation profile(LDP) of tunnel roof radial displacement of a practical project has been calculated based on spatial effects of the excavation face and E.Hoek empirical equation.Mechanical model that describes the coupled action of surrounding rock and support has been built,and then the mathematical model that describe the relation of the tunnel roof radial displacement and virtual support force in mechanical model is built.The coupled action between surrounding rock and support in their whole interaction process is analyzed by analyzing and studying of mathematical and mechanical model.For the principle of coupled action of surrounding rock and support at elastioplastic deformation stage,the latest understanding has been given.The supporting action effect of a practical project has been calculated and analyzed by the research results.In this paper,the interaction solution of complete action process of surrounding rock and support at elastioplastic deformation stage has been obtained,and the interaction of surrounding rock and support also can be on-line predicted or reproduced by the research results.