## 1 Introduction
The analysis results showed that the maximum dynamic shear displacement increment induced by quarry mining is significantly affected by the fault friction angle, the mining depth, and the position of the fault relative to the ore body, while the fault stiffness and expansion angle have little effect [21]. [PERSON] et al. investigated the characteristics of overlying strata collapse and mining pressure on a fault-influenced zone by creating a physical experimental model [22]. Recently, [PERSON] and [PERSON], 2014a; [PERSON] and [PERSON], 2014b; and [PERSON] and [PERSON], 2015, conducted a series of studies to model the effects of fault slip using various methods. The effects of mining depth, friction angle, expansion angle, and fault stiffness on fault slip were examined. In addition, the fault surface roughness and slip-weakening behavior were investigated, and the fault slip strength was estimated by using FLAC3D [23; 24; 25; 26]. [PERSON] et al., 2012, investigated the value of critical velocity obtained by transforming the stick-slip motion into a steady motion through a series of rock friction experiments. The relationship between the coefficient of kinetic friction, coefficient of static friction, and the increase in the velocity of motion was obtained [27; 28]. [PERSON] et al. investigated the influence mechanism of different geological parameters on the activation of small faults in deep coal mining and face mining by using numerical simulation [29]. [PERSON] et al. carried out a systematic superposition dynamic normal perturbation shear test on the surface of saw-cutting bare granite by utilizing a multifunctional shear test device developed independently to reveal the activation mechanism and characteristics of faults under the action of a certain stress environment and the external dynamics of the normal perturbation load [30]. [PERSON] et al. [31] derived the mining stress evolution law when the working face crosses the faults through FLAC3D. [PERSON] [32] used the Ritz method to calculate and determine the bending deformation deflection function equations of the top plate of two types of faults and carried out the weakened decompression zoning for the area near the faults through numerical simulation. [PERSON] et al. [33] conducted sandstone double-shear friction tests to determine the sliding criterion of sandstone and found the fault sliding criterion of the Taiji Coal Mine. For the problem of fault stability caused by mining disturbances, scholars at home and abroad have used a variety of methods to analyze and study the problem of fault stability, such as numerical models, mechanical models, engineering verification and theoretical analysis. The evolution law of stress during mining, the influence of various fault parameters and structural parameters on fault stability, and the fault slip criterion are obtained. However, the geological structure of the mining area is complex, and it is often impossible to fully consider a variety of factors when conducting research and analysis. The stability of the fault is not only linked to one parameter; therefore, it is necessary to consider the comprehensive situation. At present, most research has focused on the influence of a single mining method on fault stability and few research works have been conducted on the change rule of the dynamic response of faults under coordinated mining methods. In terms of numerical simulation, most of the studies reflect mining in the ore body but rarely reflect the real ore body, the fault model and the real mining situation. In order to further study the impact of mining on fault stability, in this paper, we take the West Second Mining Area of Jinchang Longshou Mine as the background; this is a typical sharply inclined metal mine, which has adopted the sublevel caving method without the sill pillar and the lower-layer filling method for coordinated mining. There are fault structures in the mining area, which will increase the risk of mining disasters.