## 1 Introduction  
With the increase in depth and intensity of coal mining, disasters such as mine earthquakes and rock bursts become more and more serious [1]. The local pressure relief measures can be divided into the coal seam pressure relief measures to control the energy storage, the dynamic load reduction technology to control the sudden release of roof energy, and the floor pressure relief method to improve the floor stress environment. Various types of decompression and pressure relief measures have a limited scope of action, and the main purpose is to reduce the stress level of coal and rock layers around the roadway, form a \"rupture circle\", and weaken the severe dynamic load [2]. Coal seam pressure relief measures generally include drilling pressure relief, coal blasting, water injection softening, and so on. Among them, the large-diameter drilling pressure relief technology has the characteristics of simple operation, low construction cost, and strong applicability, which is widely used in rock burst mines [3; 4; 5; 6; 7]. The essence of the coal seam drilling pressure relief is to actively release the part of the energy accumulated in the surrounding rock of the roadway due to the rebalancing of the original rock stress in the process of the roadway after the excavation. To avoid the ruck burst and other disasters that are produced by the violent release due to the excessive energy accumulation in the surrounding rock and to ensure the safety of coal production [8; 9]. Many scholars at home and abroad have mainly researched the mechanism and drilling arrangement parameters of drilling pressure relief and impact prevention [10; 11; 12]. As for the research on the mechanism of pressure relief boreholes to prevent rock bursts. The action mechanism of pressure relief in drill holes and the redistribution process of surrounding rock pressure are studied by different numerical simulation software (FLAC3D, version 5.0, Istasca Consulting, Inc., Minneapolis, MN, USA; 3 DEC, version 5.0, Istasca Consulting, Inc., Minneapolis, MN, USA), and the results are applied to industrial tests. The results show that the mechanism of pressure relief from drilling holes is that the drilling holes actively change the integrity of the surrounding rock and form plastic zones so that the stress is transferred to the deeper part of the surrounding rock, which reduces the energy aggregation of the coal and rock seam around the roadway and reduces the risk of rock burst [13; 14; 15]. [PERSON] et al. [16] divided the surrounding rock of the borehole into three parts through the degree of destruction of the coal around the borehole: the residual strength zone, the plastic zone, and the elastic deformation zone. The widths of the three zones were calculated and used as a guide to determine the drilling parameters. [PERSON] et al. [17] analyzed the elastic-plastic state of the coal seam borehole under the ideal state of elastic strain softening; [PERSON] [18] established a similar analytical mechanical model to analyze the energy input required to be able to produce macroscopic cracks under different drilling diameters; [PERSON] et al. [19] used a three-axis loading experimental system to simulate the lateral stresses on the coal, using acoustic emission (AE) to monitor acoustic emission events during different drilling processes and record their characteristics; [PERSON] et al. [20] applied physical modeling and acoustic emission techniques to study the fracture evolution of rock in prefabricated circular boreholes and found that tensile splitting cracks were produced in the direction parallel to the loading direction, and compression cracks were produced at both sides of the borehole. In the research of drilling arrangement parameters, some foreign scholars such as [PERSON] and [PERSON] [21], [PERSON] et al.