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Through the analysis of the subsidence of the mined-out area of the mine, the characteristics and laws of its subsidence can be mastered. According to different subsidence types and subsidence, a reasonable calculation model is used to calculate and analyse the stress of the pipeline, and the stress and strain values at different points of the pipeline are obtained. At the same time, by studying different pipeline laying methods, a reasonable pipeline laying method is selected from them to meet the adaptability of the pipeline to the ground subsidence of the goaf. When optimizing the laying method of the pipeline, the design concept and method based on the strain are used to put forward requirements for the strain of the pipeline, formulate reasonable design guidelines, and finally determine reasonable countermeasures according to the design guidelines, thereby improving the design level of the mine’s goaf pipeline, and ensure the intrinsic safety of the pipeline and coordinate the relationship between pipeline construction and mineral exploration.

The most important problems encountered in the design and operation of oil pipelines in permafrost regions are frost heaving and thawing settlement. In this paper, we conducted an investigation and analysis on the status of freezing damage of the operating oil pipelines. Based on the investigation and research, we calculated the temperature field of the oil pipeline and analysed the thawing ability under the conditions of the strain criterion. Finally, we proposed a design method for pipeline insulation and the maximum amount of thawing displacement that the pipeline can withstand. It has certain guiding significance for the thermal insulation design of oil pipelines in permafrost regions.