采空沉陷区埋地管道的力学特性与变形规律研究OA

To address the safety risks to buried pipelines posed by subsidence due to goaf collapse,this study developed a three-dimensional finite element model in ABAQUS using actual geological parameters.The mechanical responses of pipelines under longitudinal and transverse mining were compared.The results show that,under longitudinal mining,as the angle between the mining direction and the horizontal plane of the pipeline decreases,both the equivalent stress and the vertical displacement of the pipeline increase,reaching their maxima at the pipeline center.Although the final stress and deformation states resulting from longitudinal and transverse mining are generally consistent,transverse mining induces significantly more rapid variations in both stress and deformation response.These findings provide a theoretical basis for the safety assessment and protection design of pipelines in goaf areas.