## 2 Project Overview  
The Dingji Coal Mine is situated in the northwest of Huainan City, Anhui Province, China, near the geographic center of the Panxie mining area. There is a specific structural framework around the 1232(3) working face. The mining area system roadway runs along the eastern edge, and the boundary of the Xiyi 13-1 mining area runs along the western edge. The F84 reverse fault, which has a throw of 60 m, is to the north, and the 1242(3) working face, which was previously mined, is to the south. The study examines the 1232(3) transportation road. A protective coal pillar separates this road from the goat of the nearby 1242(3) working face. This roadway goes along the goat. Figure 1 shows the plan for the working face's roadway layout. The average daily advancement is approximately 3.5 m. After mining, both ends of the face are sealed using shotcrete to isolate the goat and prevent air leakage. The operational face lies in the 13 th coal seam. The coal seam has an average dip angle of 7\({}^{\circ}\) and a thickness of 3.8 m. The majority of the coal seam's roof is mudstone; however fine sandstone can also be found in select areas. This lithological unit is about 4 m thick on average. The main roof is made up of sandy mudstone, which is sometimes mixed with mudstone. It is about 3 m thick on average. The mudstone at the foot of the coal seam has an average thickness of 4.8 m. The original bottom of the coal seam is composed of fine sandstone that is approximately 4.5 m thick. We extracted standard samples from roof strata, floor strata, and coal body samples from the roadway. The strength of the specimens was evaluated through standard tests. Tensile strengths of 0.7 MPa for 13-1 coal, 1.4 MPa for mudstone, 1.5 MPa for sandy mudstone, and 2.58 MPa for fine sandstone were determined by the test results. These tensile strength values were obtained in accordance with the Chinese national standard GB/T 23561.5-2009 [31], which is consistent with the International Society for Rock Mechanics' (ISRM) suggested methods for indirect tensile  
Figure 1: Plan of the roadway configuration at the working face. strength testing of rock. The results show that the surrounding rock mass is structurally weak, which means it has low bearing capacity. Figure 2 provides further details on the strata of the ceiling and substrate. The test results from three places--the south side of the Huqiaozi syncline (No. 1 station), the area around the Huqiaozi syncline (No. 2 station), and the north side of the Huqiaozi syncline (No. 3 station) are used to calculate the in situ stress of the 1232(3) working face. According to Table 1, the lateral pressure coefficient at the working face is determined to range from 1.03 to 1.65. This shows that horizontal tectonic stress is the most important type of stress in the region [32]. The anchor net cable's symmetrical support is used in the design of the 1242(3) transportation roadway's support. During excavation, the rock around the 1242(3) transportation roadway seems to change shape a lot. This paper is mostly about the mechanical response characteristics and use of the surrounding rock of the 1232(3) transport roadway because it is next to the 1242(3) transport roadway. Mechanical Investigation of the Surrounding Rock in a Deep Soft Rock Roadway Generated by Tectonic Stress  
Because the roof of the roadway is stable, the theoretical research method is usually to simplify the roof strata into beam and plate models that are clamped or simply support [33]. However, the model does not take into account the horizontal tectonic stress on both ends, which creates a big difference between the calculated results and what actually happened on the project. This section improves the standard mechanical model of roof