## 6 Conclusions  
A full-length bonded anchor has significant local characteristics in the case of structural surface misalignment, and the following conclusions were obtained by numerical simulation and theoretical analysis:  
1. With the dislocation of the structural surface, the anchor bolt near the structural surface was locally deformed, and the axial stress and tangential stress on the anchor bolt at the deformation part could effectively improve the shear strength of the structural surface. The effect of the bolt to enhance the shear strength of the structural surface was different for different lithologies. Under unit shear displacement, the better the lithology of the structural surface, the stronger the ability of the bolt to enhance the shear strength of the structural surface, and when the bolt yielded, its enhancement of the shear strength of the structural surface was nearly equal in different lithologies.
2. With the dislocation of the structural surface, the damaged area of the anchoring agent on the anchor bolt was concentrated near the structural surface, and the length of the damaged area of the anchoring agent was nearly the same as the length of the deformation area of the bolt. The length curve of the anchoring agent damage with the dislocation of the structural surface was characterized by a rapid increase and then a flattening.
3. By calculation, the axial stresses of the bolt in coal, sandstone, and granite structural surfaces at the bolt yield were 212.76 MPa, 196.54 MPa, and 182.09 MPa, respectively, the shear stresses were 195.56 MPa, 201.14 MPa, and 205.62 MPa, respectively, the shear strengths of the enhanced structural faces were 1.5451 MPa, 1.5377 MPa, and 1.5289 MPa, respectively, and the enhancement rates were 129.84%, 129.21%, and 128.48%, respectively, compared to the shear strengths of the structural surfaces themselves.
4. When the structural surface was dislocated, the pinning action and tensile action of the anchor bolt improved the shear strength of the structural surfaces, and with the pure shear displacement of the structural surfaces, the pinning action of the anchor bolt contributed to the reinforcement of the shear strengths of the structural surfaces to a greater extent.  
Figure 19: Schematic diagram of the allowable displacement of the anchored structural surface.  
**Author Contributions:** Conceptualization, Y.T. and T.W.; formal analysis, Y.T., D.J. and T.W.; methodology, Y.T., D.J. and T.W.; writing and editing, Y.T., D.J., S.Z. and T.W.; data curation, H.L. and J.L.; writing and editing, Y.T. and D.J.; software, Y.T., D.J., S.Z. and T.W.; review and editing, H.L. and J.L. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This study was funded by the Natural Science Foundation of Shandong Province for Young Scholars (No. ZR2021 QE176) and the National Natural Science Foundation of China (No. 52104093).  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** The data associated with this research are available and can be obtained by contacting the corresponding author.  
**Acknowledgments:** We thank the Natural Science Foundation of Shandong Province and the National Natural Science Foundation of China for their support of this study. We thank the academic editors and anonymous reviewers for their kind suggestions and valuable comments.  
**Conflicts of Interest:** The authors declare no conflict of interest.