Theoretical Research And Numerical Simulation Of Anchor Roadway Based On Composite Reinforcement

In order to establish a simplified calculation method in accordance with stabilityanalysis of anchoring rock mass and reinforcement research of surrounding rock. Thispaper were studied by using theoretical analysis and numerical simulation method, themain results are as follows.（1）The theoretical analysisFirstly, this paper applied the basic principle of composite material mechanics,established a model of anchoring composite materials. We regarded anchor and mortaras elastic body, deduced the elastic parameters of equivalent anchor-mortar mechanicalmodel.Secondly, this paper quoted strengthening mechanism research results aboutanchoring rock mass from predecessors, calculated cohesion and internal friction angleof anchoring rock. This paper verified the applicability of plastic parameters ofanchoring rock mass by using equivalent mechanical model.Finally, this paper studied the prestress supporting effect on surrounding rockreinforcement, obtained secondary stress formula in plastic zone of the tunnelsurrounding rock according to elasticity plane problem of elastic mechanics,equilibrium equation, mohr-coulomb criterion and boundary conditions, deriveddisplacement formula of surrounding rock according to thick wall cylinder principle,geometry equation and physical equation. According to the equal displacement principleof elastic-plastic intercourse interface，we obtained analytical relationship about cablesupporting force, cohesion and internal friction angle, analysised the impact of anchorsupporting force on mechanical parameters of surrounding rock.（2）The numerical simulationAccording to the engineering example, this paper conducted numericalsimulation researches about composite model and discrete roadway model, validated thefeasibility of the equivalent method by analyzing two sides of the roadway, top, bottomdisplacement.The equivalent method on deformation law of surrounding rock of research has theadvantages of simple and convenient, has unique advantages in stability analysis ofsurrounding rock overall evaluation of support parameters.