采煤沉陷区油气管道泄漏风险量化分区研究

doi:10.13722/j.cnki.jrme.2021.1310

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摘要研究采煤沉陷区油气管道的泄漏风险，对保护管道的安全、维护集输工程的稳定至关重要。以鄂尔多斯盆地松散层内油气管道为研究对象，首先，分析管道–土体间的不同耦合状态，并采用弹性梁、弹性地基梁等力学模型计算出对应耦合状态的管道挠度；其次，结合规范计算出管道的极限变形量、采用可靠度理论将管道挠度与破坏泄漏相关联，随后将管道挠度与其极限变形量进行对比分割，划分管道轴向上的破坏风险等级。在此基础上结合管道的泄漏影响范围，建立沉陷区内油气管道泄漏风险的量化分区方法，并提出相应的校正方法和保护措施。最后，通过理论解对工程实例进行验算和对比验证，获得较好的一致性。结果表明：随着采煤沉陷区油气管道挠度的逐渐增大，管道发生破坏的风险等级逐渐升高；同时其发生泄漏的影响范围逐渐扩大。该方法实现沉陷区内油气管道泄漏风险的量化，有利于提高维护效率和保护管道安全。

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	任建东1
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	赵毅鑫1
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	王文3
	LIU Shimin4

关键词 ：采矿工程, 油气管道, 采煤沉陷区, 泄漏风险, 管道–土体耦合, 量化分区

Abstract：The study on the leakage risk of oil-gas pipeline in coal mining subsidence basin is essential to protect the pipeline's safety and maintain the stability of transportation projects. In this paper，the oil-gas pipelines in the loose layer of Ordos Basin are taken as the research object. First，the different coupling states between pipeline and soil are analyzed. And the mechanical models of elastic beam and elastic foundation beam are used to calculate the pipe deflection. Next，the deformation limit of the pipeline is calculated according to the industry code. And the reliability theory is used to link the pipeline's deformation and the leakage damage. Second，the pipeline deflection and its deformation limit are compared and segmented. The axial damage risk level of the pipeline was determined. On this basis，combined with the influence range of pipeline leakage，the quantitative partition method of pipeline leakage risk in subsidence basins is established. Meanwhile，the corresponding correction method and protection scheme are proposed. Finally，the engineering example is compared to the theoretical solution，and a good agreement is obtained. The results show that the risk level of pipeline damage increases with the gradual increase of pipeline deflection. At the same time，the impact area of leakage gradually increases. The method realizes the quantification of oil-gas pipeline leakage risk in subsidence basins，which is essential to increasing maintenance efficiency and protecting pipeline safety.

Key words： mining engineering oil-gas pipeline coal mining subsidence basin leakage risk coupling states of pipeline-soil quantitative partition

引用本文:

任建东1，2，赵毅鑫1，2，王文3，LIU Shimin4. 采煤沉陷区油气管道泄漏风险量化分区研究[J]. 岩石力学与工程学报, 2022, 41(S2): 3353-3368.
REN Jiandong1，2，ZHAO Yixin1，2，WANG Wen3，LIU Shimin4. Investigation on quantification partition of oil-gas pipeline leakage risk in coal mining subsidence basin. , 2022, 41(S2): 3353-3368.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1310 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS2/3353

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