## 6 Conclusions  
Based on the novel numerical method for rockburst, this paper analyzes the variation characteristics of multivariate catastrophe information such as stress, energy, fracture, and rockburst proneness index of surrounding rock with the structural plane geometric parameters after tunnel excavation. The following are the main conclusions:  
1. A rockburst numerical analysis method is proposed using the bonded block model and the multi-parameter rockburst energy index. This method improves the modeling speed and calculation accuracy. It can not only simulate the fracture initiation, propagation, and interaction between blocks but also consider the various stress states of the rock unit. It realizes the visual analysis of the multivariate information response of the surrounding rock, the rockburst intensity and occurrence range, and the real simulation of the structure plane control effect on rockburst under the three-dimensional stress state. 2. As the dip angle increases, the fracture propagation range of rock mass between the tunnel and structural plane generally shows an increasing trend, the fracture width increases, and the intensity level and occurrence range of rockburst gradually decrease. As the length increases, the fracture propagation range, rockburst intensity, and occurrence range of the rock mass increase slightly. As the relative distance increases, the fracture propagation range and rockburst intensity decrease, while the occurrence range of rockburst increases first and then decreases. 3. With the increase in the surrounding rock depth, the distribution of rockburst proneness index \(C_{rs}\) value presents a tendency of first decreasing, then increasing, and finally decreasing. The rockburst proneness in the risk area is strong-weak-sub-strong-weak and then induces a rockburst. The increasing stage of rockburst intensity is distributed near the structural plane, and its distribution characteristics are basically  
Figure 11: Comparison of “11.28” rockburst failure zone between field observation and numerical simulation: (**a**) Field situation of rockburst; (**b**) Schematic of failure area; (**c**) Simulation result (Red represents the area of intense rockburst proneness). consistent with the characteristics of stress and energy information. The order of influence degree for the structural plane on rockburst proneness is relative distance > dip angle > length. 4. The engineering verification study was conducted on the \"11.28\" rockburst case in the Jinping II drainage tunnel. The peak value of rockburst index \(C_{rs}\) between the tunnel and structural plane is greater than 40, and the larger value is distributed in a \"V\" shape, which is consistent with the geometric distribution of the actual rockburst pit, and the structural plane controls the boundary of the rockburst pit. The numerical analysis method for rockburst proposed in this paper can better predict and reflect the catastrophic characteristics of the strain-structural plane slip rockburst, and the case study also has verified the rationality and applicability of the method. In this study, only the parameter design of dip angle, length, and relative distance about one structural plane is considered. However, under the requirements of reasonable structural plane parameter design, the structural plane arrangement also has a significant impact on rockburst. In the future, the corresponding numerical research can be carried out on the parameters of structural plane arrangement, such as spacing and number. And the influence of blasting load on the structural plane cannot be ignored with the drill-blasting method in deep underground engineering. The related research about the influence of blasting load disturbance on structural plane should be carried out, and the coupling effect of blasting load and engineering excavation should be fully considered. Conceptualization, J.G. and B.H. ; methodology, J.G. and Z.Z. ; software, H.Z. ; validation, Z.Z. and F.S. ; formal analysis, J.G. and Z.Z. ; investigation, B.H. ; resources, J.G.