Analysis Of Influence Of Anchorage Segment Structure On Anchoring Performance Of Mine

In recent years,the optimization of structural parameters of the anchorage section of the steel rebar anchor has become one of the important research contents of scholars at home and abroad.Through the adjustment of the parameters of the rebar bolt,the anchoring performance of the anchor is improved effectively and the anchoring effect is improved.Therefore,this paper combines the theoretical calculation with FLAC3D numerical simulation to analyze the effect of anchoring section structure on anchor anchoring performance by numerical simulation.Firstly,combined with the theory of uniform distribution of anchoring force and weak surface theory,the maximum drawing force of rebar bolt with diameter of 22mm is calculated to be 103KN and the optimum transverse rib height is 0.8mm.Using the Midas-FLAC3D coupled modeling technique,the numerical model of the ribbed steel bar was established in FLAC3D.The plastic damage characteristics of the anchoring agent and the surrounding rock and the Mises equivalent stress transmission law of the anchorage section were analyzed by numerical simulation.Finally,the influence of FLAC3D numerical simulation on the anchoring performance of anchor anchoring section structural parameters(transverse rib height,transverse rib arrangement and transverse rib spacing)is further studied.Numerical simulation shows that it is beneficial to reduce the transverse rib height The effect of the transverse rib arrangement on the anchoring effect of the anchor is related to the preconditioning condition such as the preload,and the variation of the transverse rib spacing has a great influence on the anchoring performance of the anchor bar,When the transverse rib spacing is 48mm,the anchoring performance is the best.In this paper,the numerical analysis of the anchoring section of the anchor is carried out by using FLAC3D from the angle of the transverse rib of the bolt,the arrangement of the transverse rib and the spacing of the transverse ribs.Further,the structural parameters of the anchor anchoring mechanism and the anchor anchoring section are further Research has a certain reference value and reference.