Numerical simulation of mixing process of resin grout and optimization experiment of high-efficiency mixing component

In order to solve the commonly various anchoring failure problems of roof bolting,focusing on the analysis of the anchoring system adhesive failure of resin bolts and its affecting factors,it is found that the mixing effect of the resin grout has an important influence on its occurrence. In order to effectively reduce the impact of the anchor system failure problem and improve the mixing quality of resin anchoring agent,according to the mixing process of the resin grout and the influencing factors of the mixing effect,the high-efficiency mixing component of resin grout,that can be installed at the top of bolts or cable bolts,has been developed. The combination methods of theoretical analysis,numerical simulation and laboratory tests were used to analyze the important role of resin grout in the performance of anchoring system. At the same time,the structure design and parameter optimization of the high-efficiency mixing component were completed,and the component's working principle,the mixing effect and the effect of improving the anchoring quality were analyzed. The results show that when the tilted angle of the mixing blade of the component is 30°,the structural parameter design is reasonable,and the resin grout has a better mixing effect. The high-efficiency mixing component is installed at the top of bolts,the moving speed of resin grout,the uniformity and curing effect of resin grout are improved,and the resin grout distribution is denser. Under the mixing action of the component,the resin grout package is broken into smaller fragments,which avoid the impact of larger fragments on anchoring quality and help to improve the anchoring quality of anchor. The comparative analysis results of the bolt pull test show that after installing the component at the top of bolts,the pull force peak value of the bolts and the energy absorption capacity of the pull process are greatly improved compared with the case of only the bolts,and the anchoring system's ability to resist damage has been obviously enhanced.