## 1 Introduction
[22], and [PERSON] and [PERSON] [23] took the lead in implementing the coal seam drilling pressure relief measures in mine production for the prevention and control of rock burst and wrote it as an industry standard into the regulations and stipulated that the pressure relief borehole method as the preconstruction must be carried out before the mining; based on a large number of engineering practices, they proposed the optimal borehole diameter and spacing and summarized the formula of independent borehole rupture radius with the underground measurement data to get good results in preventing and controlling the rock burst. On this basis, research on the design of drilling unloading and preventing rock burst parameters has been started one after another. [PERSON] et al. [24] studied the influence of the drilling arrangement on the mechanical properties of the coal model through uniaxial compression tests and determined the intrinsic connection between the drilling diameter, the number of rows, and the energy evolution. [PERSON] et al. [25] determined the optimal drilling diameter for preventing rock bursts. [PERSON] et al. [26] used similar materials to design different physical tests with different numbers of boreholes and arrangements and obtained that the effect of pressure relief is positively proportional to the borehole diameter, and the reduction in hole spacing and the increase in borehole depth will enhance the effect of pressure relief. [PERSON] and [PERSON] [27], and [PERSON] and [PERSON] [28] used Particle Flow Code (PFC) numerical simulation to obtain the occurrence, expansion, and penetration of cracks around the boreholes, to achieve the goal of pressure relief of coal seams. The increase in the diameter of the boreholes and in the depth of the boreholes will strengthen the effect of pressure relief. [PERSON] et al. [29] studied the generation and development of local cracks around the borehole and concluded that the higher the density of the borehole, the more cracks are developed, the more energy is released, and the effect of pressure relief is better. [PERSON] et al. [30] studied the influence of the shape of the borehole on the mechanical properties and fracture characteristics of rock-containing holes under the action of uniaxial load, analyzed the crack development and expansion of different types of specimens and the distribution of stress, and finally obtained the stability order of the borehole with different shapes as follows: circle \(>\) inverted u-shape \(>\) trapezoid \(>\) square \(>\) rectangle. [PERSON] et al. [31]studied the crack initiation, agglomeration mechanism, and damage behavior of granite specimens with different prefabricated borehole diameters, distributions, and spacings. The above research results have played a powerful role in promoting the development of drilling pressure relief technology for dynamic pressure roadways in working faces. The force state of anchor bolts and anchor cables changes under the influence of dynamic pressure. [PERSON] constructed a 2D different element method (DEM) model of a deep tunnel in an underground coal mine and comprehensively evaluated the effects of yielding (D-bolt and Roofex) and conventional anchors (fully resin-grounded steel bars) on controlling the self-initiated strain burst. [PERSON] conducted 36 static tests and 576 dynamic tests to examine the effects of bolt diameter, steel yield and ultimate strength, dynamic loading rate, and dynamic loading mass on cable bolt displacement, shear, and energy absorption capacity; however, the interrelationship between support and unloading borehole parameters was not considered [32; 33]. It is known that the diameter of the drill hole has the greatest influence on the decompression effect [34]. However, conventional pressure relief drilling will weaken the strength of the roadway support structure while transferring the high stress of the surrounding rock.