## 3 Results
### Rupture Characteristics  
The final damage pattern of the rock mass under the conditions of different grain sizes and anchoring methods is shown in Figure 8. As can be seen from the graph,  
Figure 7: Influence of the degree of surrounding rock fragmentation and the number of anchors added on the mechanical parameters of the rock mass. Under the condition of no anchor (0 anchor), the uniaxial compression of the specimen formulated with large-grained aggregate was more serious than that of the small-grained aggregate specimen. The specimen as a whole showed diagonal shear damage, but the secondary fissures showing splitting damage developed to a high degree, and different sizes of block spalling phenomenon appeared. When the aggregate diameter was 2-4 mm (Grain size A), the specimen split along the axial direction, i.e., the morphology of the rupture surface was parallel to the loading axial direction, and no shear rupture occurred; when the aggregate diameter was 4-8 mm (Grain size B), the shear rupture was relatively slight, and the shear rupture surface was not completely through the upper and lower parts of the rupture surface; and when the aggregate diameter was 10-15 mm (Grain size C), obvious shear damage occurred on the free surface, and a large number of block spalling phenomenon occurred. This shows the strength difference of the specimens made of the aggregates with different grain size ratios. 2. Under the action of the single anchor (1 anchor), the rock body along the anchor direction was subjected to a certain support resistance constraint, and the rupture of the specimen was relatively homogenized. The rupture crack direction of the rock body changed, the main rupture cracks in the aggregate diameter of 2-4 mm and 4-8 mm rupture cracks in the anchor position rupture crack direction changed at a certain angle, compared with the no-anchor condition rupture degree, which was small; 10-15 mm aggregate single-anchor specimens produced intensive rupture cracks, appearing to a certain extent of the block exfoliation. Combined with the rupture surface of the specimen under the anchored condition in Figure 8, the anchoring effect of the anchor on the specimen was reflected in the two aspects of reinforcement and crack stopping. Under the pre-stressing effect of the anchor, when the crack developed to the range of the anchor's action, the anchor played the role of stopping the crack from developing or changing the direction. The role of the trap along the anchor axial force was applied, and when the trap was in contact with the formation of conical stress concentration within the rock mass, the rock mass played a reinforcing effect. 3. Under the double-anchor condition (2 anchors), the damage pattern of the anchored rock body, when compared with single anchor with an aggregate diameter of 2-4 mm, had less developed specimen secondary cracks; when the aggregate diameter was 4-8 mm, the main rupture cracks were distributed along the direction of the axial stress, and the specimen underwent splitting damage, and the secondary cracks were obviously reduced. When the aggregate diameter was 10-15 mm, the rupture cracks produced by the single-anchor specimen are greater. When the aggregate diameter was 10-15 mm, the rupture cracks produced by the single-anchor specimens were intensive, and those produced by the double-anchor specimens were relatively scattered. This shows that the increase in anchors effectively enhanced the cementation between the anchors and the rock body, which can augment the supporting role of anchors, thus alleviating the degree of rupture of the rock body and improving the overall bearing capacity. The anchoring effect of the anchor on the specimen was reflected in the two aspects of reinforcement and crack stopping. Under the prestressing reinforcement of the anchor, when the crack developed into the reinforcement range of the anchor, the anchor played the role of stopping the crack from developing or changing its direction.