Abstract The stratum settlement caused by underground mining is one of the main geological disasters that threaten and damage buried pipelines. Therefore, the mechanical behavior of buried pipe under stratum settlement is investigated in this paper. Effects of pipeline parameters, mining area parameters and inclination directions of mining area on mechanical behavior of the buried pipeline are discussed. The results show that the maximum Von Mises stress and the maximum vertical displacement of pipeline are located in the middle of the pipeline during the mining process. As the excavation length increases, the Von Mises stress, the circumferential strain and vertical displacement increase. However, there is only stress concentration in the pipeline, and does not appear yield deformation. The vertical displacement of the pipeline is much greater than the horizontal displacement. The maximum stratum displacement appears on the upper surface of the mining area and it is stratum settlement. In addition, as the diameter-thickness ratio, buried depth, surrounding soil thickness of the pipeline and the height and the width of mining area increase, the maximum Von Mises stress, the circumferential strain and maximum vertical displacement of the pipeline increase, but they decrease with the increase of the buried depth of mining area. Whether the mining area is horizontal inclination or longitudinal inclination, the maximum Von Mises stress and maximum vertical displacement of pipeline are located in the middle of the pipeline. The maximum Von Mises stress, the circumferential strain and vertical displacement of pipeline decrease with the increase of the inclination angle. However, for the mining area of longitudinal inclination, the pipeline would produce horizontal displacement, the horizontal displacement of the pipeline increases with the increase of longitudinal inclination angle, and the position of the maximum strain of the pipe appears to shift. For the mining area of horizontal inclination, with the increase of horizontal inclination angle, the right side of vertical displacement curves approximately overlap, but the left side separates from each other.

中文翻译：

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地下开采引起地层沉降下埋地管道力学行为分析

摘要 地下开采引起的地层沉降是威胁和破坏埋地管道的主要地质灾害之一。因此，本文研究了地层沉降下埋地管道的力学行为。讨论了管道参数、矿区参数和矿区倾角对埋地管道力学行为的影响。结果表明，开采过程中最大Von Mises应力和最大管道垂直位移均位于管道中部。随着开挖长度的增加，Von Mises 应力、周向应变和垂直位移增加。但管道内只有应力集中，并没有出现屈服变形。管道的垂直位移远大于水平位移。最大地层位移出现在矿区上表面，为地层沉降。此外，随着管径厚比、埋深、周围土层厚度以及矿区高度和宽度的增加，管道的最大Von Mises应力、周向应变和最大垂直位移增加，但随矿区埋深增加而减小。无论采区是水平倾斜还是纵向倾斜，管道的最大Von Mises应力和最大垂直位移都位于管道中部。最大 Von Mises 应力，管道的周向应变和竖向位移随着倾角的增大而减小。然而，对于纵向倾斜的矿区，管道会产生水平位移，管道的水平位移随着纵向倾斜角的增加而增加，管道的最大应变位置出现偏移。对于水平倾角矿区，随着水平倾角的增大，竖向位移曲线右侧近似重叠，而左侧相互分离。管道的水平位移随着纵向倾角的增加而增加，管道的最大应变位置出现偏移。对于水平倾角矿区，随着水平倾角的增大，竖向位移曲线右侧近似重叠，而左侧相互分离。管道的水平位移随着纵向倾角的增加而增加，管道的最大应变位置出现偏移。对于水平倾角矿区，随着水平倾角的增大，竖向位移曲线右侧近似重叠，而左侧相互分离。