# Numerical Simulation Analysis Method for Rockburst Control in Deeply Buried Caverns
## 1 Introduction  
In the past decade, with the construction of increasingly deep underground caverns, more and more casualties caused by rockburst have occurred from time to time. [PERSON] [1] assessed the risk of roof falls in the development mine workings in the process of longwall coal mining in terms of Ukrainian mines and concluded that extra rockburst control methods can reduce casualties. So, in order to conduct numerical simulation of rockburst control measures, it is necessary to first understand the mechanism of rockburst. [PERSON] [2] firstly introduced the definition of rockburst as a sudden separation or falling off of the rock from the tunnel wall due to excessive stress on brittle and hard rocks. This viewpoint is an important definition of rockburst. [PERSON] and [PERSON] [3] reported rockburst as any sudden and violent explosion of rock when the amount of stress exceeds the strengthof rock mass. From 1980 to 2009, all rockburst definitions focused on the ejection of rock mass when the rock energy is released [4; 5; 6; 7]. [PERSON] et al. [8] defined rockburst as a sudden and violent movement of rock in high-stress environments. In general, rockburst is a phenomenon in which the elastic energy accumulated in brittle and hard rock masses is disrupted by excavation due to the influence of high geostress. This disruption leads to a sudden release of elastic energy, causing the rock mass to be ejected and collapse. The characteristic of rockburst is that there are no visible signs before it occurs; but the energy released during its occurrence is enormous. This can lead to casualties among personnel, loss of equipment, and delays in the project. Controlling the rockburst and reducing its hazards is crucial for construction workers. With the increasing occurrence of rockburst in deep underground engineering, scholars have conducted extensive research on rockburst disasters from theoretical analysis, numerical simulation, indoor experiments, on-site testing, and other aspects. From the studies in the Canadian hard rock mines on rockburst hazards, the rockburst damage mechanisms depend on the level of underground confinement [9]. [PERSON] et al. [5] classified rockburst damage into three types, i.e., rock bulking due to fracturing, rock ejection due to seismic energy transfer, and rockfall induced by seismic shaking. [PERSON] [10] considered three major types of rockburst, namely, strain burst, fault-slip burst, and the combination of the two mechanisms. They conducted multiple studies on the mechanisms, types, and prevention methods of rockburst. They also explored the mechanism of rockburst and its incubation evolution. Additionally, they proposed corresponding prediction methods and prevention measures. Based on the accumulation of elastic energy in rock masses and the factors that influence rockburst, [PERSON] et al. [11] discussed the mechanism of deformation-induced rockburst and proposed enhanced methods for predicting rockburst. These methods can help reduce the risk of rockburst and prevent it by improving the physical parameters of the surrounding rock. According to the rockburst mechanism, [PERSON] [12] summarized methods for testing rockburst risk, which include the seismic method, the drilling cuttings method, the acoustic emission method, the microgravity force method, the electromagnetic radiation method, the vibration method, and the photoelastic method. According to the influence of various factors on rockburst, [PERSON] [12] proposed that the rockburst grade can be reduced by modifying the internal conditions (such as lithology) and external conditions (such as tunnel layout). Additionally, [PERSON] suggested that rockburst can be prevented through the implementation of anchorage reinforcement measures. After summarizing the practice of controlling rockburst through Jinping auxiliary tunnel blasting, [PERSON] et al. [13] demonstrated that minimizing the impact of blasting on the surrounding rock is a crucial approach to decrease the grade and frequency of rockburst incidents.