# Stability Analysis of Roadway Groups under Multi-Mining Disturbances
## 1 Introduction  
Deep mining has become a common practice in the east of China due to the exhaustion of shallow coal resources [1]. After mining coal, the in situ stress redistributes and abutment stress forms around the coal mining goat [2, 3, 4]. The distance from the peak abutment pressure to the coal wall decreases with the increase in the mining depth. Large stress concentrations cause the collapse of roadways, rockburst, gas drainage, and other issues [5, 6]. Researchers can grasp laws of the influence of mining face on the surrounding rock strata and put forward preventions and control measures to achieve coal mine safety production by fully investigating distribution characteristics of the mining stress field [7, 8, 9]. Moreover, the main roadways with long service life play an important role in transportation, ventilation, and communication [10, 11, 12]. The main roadways are usually excavated from the shafts and roadway groups [13, 14]. Due to various factors such as large cross-sections, and large disturbance effects, the surrounding rock of these roadways can broke and become unstable [15, 16]. In addition, the complexity in terms of space and time and the uncertainty of geological conditions complicate the exploration of surrounding rock instability factorsof multi-disturbance roadways in deep wells [17; 18]. Consequently, the new efficient support technology is required to maintain the stability of roadways within the service period after revealing the failure mechanism of multi-disturbed roadways [19; 20].  
Some studies have been carried out on the law of advanced influence of the working face [21]. For example, previous studies adopted microseismic and online stress monitoring technology to measure the vertical stress of the coal body at 31102 working face of Nalinhe No. 2 Mine. They analyzed the stress distribution law and determined the influence distance of the working face in advance and support measures. Some of these studies used UDEC software to analyze change characteristics of the roof and floor stress field, and the distribution law of advanced abutment pressure in the working face during mining. Some used Flac3D software to analyze stress distributions of a roadway with different sections after excavation and proposed the concepts of equivalent excavation and ineffective reinforcement area according to different tunnel cross-section shapes [22; 23; 24; 25; 26].  
The mechanism of mining on the surrounding roadway group has not yet been explained [27]. For instance, some researchers systematically summarized the failure modes of strata bedding plane shear, such as delamination, end compression, shear, bending, and tension. The contact pressure model of strata slip was established according to the rotation angle equation, and the deformation geometrical relationship of composite beams [28]. Some combined the key layer calculation discrimination method with the field high-precision microseismic monitoring technology to accurately determine the level of the key strata. Other studies established the mechanical model of the key strata based on the theory of catastrophe and structural mechanics to analyze the stresses fields. Furthermore, the influence of the key strata on the surface subsidence control in coal mining from the perspective of movement and deformation of strata inside the overburden was explored. The fracture spacing and horizons of each inferior strata and the main key strata are calculated by the key strata theory. The 3 DEC software was used to study the controlling effect of key layers on the law of surface subsidence [29; 30; 31].  
The existing methods only adopt the influence of the overlying part of the rock strata on the working face mining, which have some limitations on the main key strata caring caused by long face mining, and the effect of dynamic pressure on adjacent roadway groups. Determining the influence range of mining face and the influence mechanism of mining on the surrounding roadway groups are important.