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金属矿山 ›› 2024, Vol. 53 ›› Issue (3): 183-.

• 地质与测量 • 上一篇    下一篇

采动影响下浅埋输油气管线变形监测与风险性评价 方法及应用实践

张连贵1 刘峰建2 张 鑫3 郭广礼3 李怀展3 宫亚强3   

  1. 1. 兖矿能源集团股份有限公司,山东 济宁 273500;2. 兖矿能源集团股份有限公司东滩煤矿,山东 济宁 273512; 3. 中国矿业大学环境与测绘学院,江苏 徐州 221116
  • 出版日期:2023-03-15 发布日期:2024-04-25
  • 基金资助:
    兖矿集团股份有限公司科学技术项目(编号:1040B2022000040);国家自然科学基金区域联合基金重点项目(编号:U21A20109)。

Deformation Monitoring and Risk Assessment Method and Application Practice of Shallow Buried Oil and Gas Pipelines under the Influence of Mining

ZHANG Liangui1 LIU Fengjian2 ZHANG Xin3 GUO Guangli3 LI Huaizhan3 GONG Yaqiang3   

  1. 1. Yankuang Energy Group Company Limited,Jining 273500,China; 2. Dongtan Coal Mine,Yankuang Energy Group Company Limited,Jining 273512,China; 3. School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China
  • Online:2023-03-15 Published:2024-04-25

摘要: 目前,我国油气资源主要以埋地管线的形式输送,穿越采空区时采动造成的地表移动变形必然会对埋 地输油气管线产生一定的影响和危害。鲁皖管道济宁支线穿越兖矿能源集团股份有限公司东滩煤矿,与煤矿三采区 3308 工作面最近水平距离仅85 m。为保证鲁皖管道济宁支线在安全运行的前提下实现3308 工作面安全高效开采, 提出了浅埋输油气管线及地表变形监测与评价方法。基于3308 工作面地表移动变形实测及管线应力监测数据,研究 了鲁皖管道济宁支线沿线地表变形特征及对管道的影响,分析了采动影响下的管线监测应力变化,在此基础上对受 采动影响埋地管线当前的风险性进行了评价并给出管线防护建议措施。结果表明:目前3308 工作面开采造成的地表 下沉及倾斜变形对管道变形影响较小,管道沿线地表的当前稳定性级别为Ⅳ级,危险程度较低;地表移动变形对管道 应力状态有一定的影响,特别是初期开采区域距离管线较近,管道沿线地表下沉较活跃,导致管道轴向应力增大;对 管道进行一定周期的应力监测,监测结果均低于管道预警规范的第三级阈值,管道运行始终处于绿色无风险范围内, 后续需继续采取措施对采空区场地及埋地输油气管线进行变形监测和日常防护。研究结果对于埋地输油气管线下 安全高效采煤具有一定的借鉴意义。

Abstract: At present,China′s oil and gas resources are mainly transported in the form of buried pipelines. The surface movement and deformation caused by mining when crossing goaf will inevitably have a certain impact and harm on the buried oil and gas pipelines. The Jining Branch Pipeline of the Shandong-Anhui Pipeline passes through Dongtan Coal Mine of Yankuang Energy Group Company Limited,and the nearest horizontal distance from the 3308 working face in mining area 3 is only 85 m. In order to ensure the safety of the Jining Branch Pipeline of the Shandong-Anhui Pipeline and realize the safe and efficient mining of the 3308 working face,a monitoring and evaluation method for shallow buried oil and gas pipelines and surface deformation is proposed. Based on the actual measurement of surface movement and deformation of the 3308 working face and the monitoring data for pipeline stress,the characteristics of surface deformation along the Jining Branch Pipeline of the Shandong-Anhui Pipeline and its impact on the pipeline are studied,and the changes of pipeline monitoring stress under the influence of mining are analyzed. On this basis,the current risk of buried pipelines affected by mining is evaluated,and the pipeline protection measures are proposed. The results show that the surface subsidence and slope deformation caused by the mining of 3308 working face have little impact on the pipeline deformation,and the current stability level of the surface along the pipeline is Grade Ⅳ,with low risk. The surface movement and deformation have a certain impact on the stress state of the pipeline, especially the initial mining area is close to the pipeline,and the surface along the pipeline is more active,leading to the increase of the axial stress of the pipeline. A certain period of stress monitoring practice was carried out for the pipeline,and the monitoring results were lower than the third level threshold value of the pipeline early warning specification. The pipeline operation was always in a green and risk-free range. In the future,measures should be continued to be taken to monitor the deformation and daily protection of the goaf site and buried oil and gas pipelines. The study results have certain reference significance for safe and efficient coal mining under buried oil and gas pipelines.