###### Abstract
In recent years, experts in related fields at home and abroad have conducted extensive research on buried pipeline systems by using analytical methods, dynamic models, similar simulation systems, and other specific methods. In terms of theoretical analysis, based on the theory of the elastic foundation beam, [PERSON] et al. established a mechanical model of pipe-soil interaction when buried steel pipelines are partially suspended. Using the deformation coordination between the suspended section and the non-suspended section of the pipeline, the deflection and internal force of the partially suspended pipeline were analyzed [12]. Based on the elastic layered theory, [PERSON] et al. used the transfer matrix method and the finite difference method to establish a calculation method of underground pipeline deformation under the condition of soil heterogeneity [13]. [PERSON] et al. used the probability integral method to predict the three-dimensional deformation of the surface in the subsidence area. Combined with factors such as the axial action between the pipeline and the soil and the nonlinearity of the pipeline material, a simplified evaluation formula for the maximum stress and strain of the buried pipeline in the subsidence area was proposed [14]. [PERSON] et al. analyzed the deformation equation of pipelines under different coupling states of pipeline-soil by the elastic foundation beam model [15]. Based on the theory of continuous pipelines, [PERSON] et al. analyzed the influence of tunnel excavation on the buried pipeline considering factors such as stratum displacement settlement, pipeline section stiffness, and joint stiffness [16]. In terms of numerical simulations, [PERSON] et al. proposed an analytical methodology for the strain analysis of pipelines subjected to permanent ground-induced actions in geohazard areas, which resulted in closed-form expressions for pipeline deflection and strains [17]. [PERSON] et al. defined the safety factor of pipelines through the FISH language built-in FLAC3D and obtained the sinking law and safety factor for pipelines at different mining stages through numerical calculation and analysis [18; 19]. [PERSON] et al. established a finite-element model based on the soil spring model and proposed that the axial and vertical displacements of a pipeline increase with the increase in the mining thickness and the deformation reaches extreme values in the middle and inner edges of the subsidence area [20; 21]. [PERSON] et al. analyzed the deformation curve of a pipeline and the stress state of the top and bottom under the influence of coal mining through ABAQUS [22]. Regarding similarity simulation, [PERSON] et al. designed a test system for the study of pipe-soil interactions in subsidence soil and measured the sinking deformation of pipelines, the earth pressure around pipelines, and the axial strain on pipelines in the presence of different levels of soil subsidence [23; 24]. Through similar simulations, [PERSON] et al. indicated that the bending deformation in the center of the subsidence area and the oblique tensile deformation at the inflection point were the main causes of pipeline failure [25]. [PERSON] et al. analyzed the deformation characteristics of buried pipelines under the action of surface soil subsidence with similar simulation results and considered that the deformation curve of pipelines under the influence of coal mining conforms to the Gaussian function and that there is a phenomenon of pipe-soil separation [26; 27; 28]. [PERSON] et al. proposed a new mechanical model to compute the earth pressure above a pipeline considering pipe-soil interactions and the three-dimensional soil arching effects of cohesive fills, based on the Terzaghi vertical sliding surface theory [29]. [PERSON] et al. researched the pipe-FC interaction mechanism and compared it with the pipe-soil interaction mechanism under normal fault displacements caused by earthquakes [30]. To clarify the impact of excavation unloading on buried pipelines, [PERSON] et al.