Experimental Study and Model Analysis of Rheological Mechanical Properties of Anchoring Interfaces

The rheological properties of anchoring systems are one of the key factors affecting the long-term stability of anchoring engineering. Although, scholars at home and abroad have conducted many studies on this property, research on the rheological properties of anchoring interfaces is still limited. This study explored the rheological characteristics of the anchoring interface of cement mortar anchoring agent through four sets of rheological tests, and proposed a component model for the entire rheological process of the anchoring interface based on NVPB nonlinear rheological body. Through experimental data inversion, various model parameters were obtained. The results show that the rheological process of the anchoring interface can be divided into three stages: initial rheological, constant velocity rheological, and accelerated rheological. The proposed model has good agreement with experimental data, with correlation coefficients above 0.97. This indicates that the model has strong applicability to the rheological properties of the anchoring interface, and has certain reference significance for subsequent research on the rheological properties of the anchoring interface.