Novel Numerical Approach to Analysis of Axial Stress Accumulation in Pipelines Subjected to Mine Subsidence

Spatio-Temporal Evolution of Loading and Deformation of Surface Gas Pipelines for High-Intensity Coalbed Mining and Its Integrity Prediction Methodology

“…In order to grasp the loading and deformation characteristics of shallowly buried pipelines in the surface subsidence area, at present, scholars at home and abroad adopt the foundation beam model to simulate the interaction between the pipeline and the soil, divide the deformation between the pipeline and the soil into coordinated and uncoordinated deformations in the process of surface subsidence, establish the pipeline deflection differential equations and the mechanical model, put forward the segment probability integral correction model for the prediction of the surface subsidence, achieve the prediction of the boundary of the subsidence basin, and analyze the stress and deformation distribution law of pipe body in the process of pipe-soil coordinated and uncoordinated deformation in the subsidence area [9][10][11][12]. Meanwhile, the random medium theory has also been applied to study the deformation law of the soil around the pipeline, which can more accurately assess the strain or stress suffered by the pipeline [13][14][15]. Due to the difficulty of real-time on-site monitoring of the stress and strain on pipelines in the subsidence area of coal mining and the high cost of monitoring, with the continuous enrichment of mechanical and theoretical models of pipelines and the rapid development of numerical simulation software, some scholars have used the finite element method to study the nonlinear mechanical response of pipelines and soil parameters to buried pipelines during the subsidence of the local soil layer [16][17][18][19][20][21].…”