## 5 Conclusions  
Both a numerical simulation and a similar simulation showed that under the action of high stress and the conditions of a 45\({}^{\circ}\) surrounding rock inclination, the deformation and failure of the roadway-surrounding rock had the following conclusions:  
1. The deformation of the surrounding rock in roadway layered surrounding rock was asynchronous in time and asymmetric in space. The temporal asynchrony manifested in the order of appearance of the deformation area of the roadway surrounding rock, showing that the tangent area between the layered surrounding rock and the roadway surface was the earliest, followed by the layered surrounding rock and the vertical area of the roadway surface. The spatially asymmetric deformation of the surrounding rock of the layered roadway manifested in that the deformation amount was different in different areas of the surrounding rock of the roadway. The order of the displacement of surrounding rock at the four corners of the roadway was upper right, lower left, upper left, and lower right.
2. The layered surrounding rock conditions affected the shape symmetry of the plastic zone of the roadway. The specific performance was that in the area where the rock layer and the roadway surface were tangent, and in the vertical area between the rock layer and the roadway surface, the plastic zone had a large development depth, while other areas had a small plastic zone development depth, and there was a blind zone in the lower right area.  
Figure 11: Plastic zone shape, stress measurement points, and stress distribution.  
3. Affected by the development shape of the layered surrounding rock and the plastic zone, the internal stress value of the surrounding rock at the same distance from the roadway surface was different. With the increase of the surrounding rock stress, the plastic zone inside the surrounding rock of the roadway expanded, and the stress at the stress monitoring point first increased and then decreased; the perpendicular radial stress inside the surrounding rock of the roadway was smaller than the tangential stress. 4. Similar simulation stress monitoring results and numerical simulation plastic zone distribution showed that the stress monitoring value increased with an increase of the model's confining pressure when monitoring points were outside the plastic zone. With the plastic zone expanding, the monitoring points which closer to the roadway surface moved from outside of the plastic zone into the plastic zone, and the monitoring points' stress value first increased and then decreased. 5. From the point of view of the arrangement direction of the pressure box at the monitoring point, on the same radius from the center of the roadway, if the normal direction of the pressure box was tangent to the concentric circle of the roadway, the stress value of the monitoring point increased greatly, and if it was vertical, the stress value increased more slowly.  
Software, Z.Z.; resources, X.G. and T.L.; writing--original draft preparation, X.Z.; writing--review and editing, J.C.; project administration and funding acquisition, H.W. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the National Natural Science Foundation of China, grant number 52074117, 51774133, and by the Open Fund of the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology (No. SKLMRDPC20 KF08). The APC was funded by the National Natural Science Foundation of China, grant number 52074117, 51774133.  
Not applicable.  
Data Availability Statement: Data is available on request due to privacy restrictions.  
The authors declare that there is no conflict of interests regarding the publication of this article.