## 1 Introduction  
Anchor bolt support is an active form of support with many advantages, such as good support effect and low economic cost. It has been widely used and has become the main form of support for the tunnel, mining, and civil defense engineering. With the continuous development of the economy and technology, the development and utilization of underground space are gradually moving towards deeper levels. The ground stress is also gradually increasing from low to high. In high-ground stress environments, the probability of nonlinear physical and mechanical disasters such as rockburst increases. Under such instantaneous dynamic loads, conventional steel bolts are prone to failure due to tensile fracture. Therefore, the main research direction of new anchor bolts today is to provide constant anchoring force and have good ductility to absorb energy when significant deformation occurs in the surrounding rock. At the same time, many scholars have conducted a large number of comparative and systematic studies on such projects from various levels, such as model tests, numerical simulations, theoretical analyses, and field tests, in terms of blast resistance of caverns. The research results have also been widely applied to field engineering. Some scholars have actively explored the blast resistance of anchoring and shotcrete-supported caverns [1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19]: [PERSON] [1] studied the problem of blasting damage to underground mine caverns and discussed the main factors leading to cracks and peeling of the surrounding rock of caverns and proposed that the vibration amplitude of the surrounding rock caused by blasting is an important reference. By using UDEC software, [PERSON] [2] studied and analyzed the stability of anchor-spray-supported caverns after two successive impulsive loads. [PERSON] et al. [3] used the high-pressure plane charge loading test technique to study the blast resistance of different types of structures in the rock medium, focusing on the direct wall arch structure. Three types of structures were tested: high-performance reinforced concrete, C30 reinforced concrete, and C30 reinforced concrete with foam concrete backfill. The dynamic response and damage characteristics of these structures were investigated. The experimental results showed that, under the same plane charge explosive load, using high-performance reinforced concrete and C30 reinforced concrete with foam concrete backfill can effectively reduce the damage extent of the rock structure. The composite structure with C30 reinforced concrete and foam concrete backfill exhibited excellent blast resistance. [PERSON] et al. [4] presented the surface overpressure distribution and dynamic response of retaining walls in underground structures subjected to internal explosions. The research indicated that the underground structure was in a static equilibrium state before the internal explosion, influenced by both gravity and the restraining pressure from the surrounding soil. A finite element model of a closed underground frame structure was established using the ANSYS/LS-DYNA software. Subsequently, a staged numerical simulation was conducted to study the overpressure distribution on the retaining wall surface, with a primary focus on analyzing the influence of initial equilibrium stress on the distribution pattern of explosion overpressure and the dynamic response of the retaining wall. [PERSON] et al. [5] used the particle flow code (PFC2D) to build numerical models of deep holes and inverted U-shaped tunnels and performed numerical tests at four different blasting positions. The dynamic response characteristics of deep-hole tunnels under blast interference were thoroughly analyzed. Radial stress waves and tangential stress waves around the deep hole during the explosion were obtained. The results showed that the diffraction initiation zone and diffraction termination zone were related to the fluctuation of stress waves.