煤矿长壁开采过程中埋地管道的变形破坏分析

发布时间：2018-01-27 06:50

本文关键词： 埋地管道长壁开采变形破坏 FLAC~(D)　出处：《油气储运》2016年04期 　论文类型：期刊论文

【摘要】：近年来煤矿开采引起的地面塌陷已影响了油气管道的安全运营,我国煤矿采空区上方埋地管道的安全性评判标准及稳定性量化标准尚不成熟,对长壁开采过程中不同开采阶段引起的管道变形破坏特征尚未研究。利用安全系数的概念反映管道不同部位的应力情况,基于第四强度理论,应用有限差分软件FLAC3D中的FISH语言输出管道的安全系数,判断管道的稳定性,进而分析了长壁开采过程中不同开采阶段管道的下沉和安全系数的变化规律。研究结果为沉陷区埋地管道的监测和防护提供了理论依据。
[Abstract]:In recent years, the surface collapse caused by coal mining has affected the safe operation of oil and gas pipelines. The safety evaluation standard and stability quantification standard of buried pipelines above the goaf of coal mines in China are not mature. The characteristics of pipeline deformation and failure caused by different mining stages in long wall mining process have not been studied. The concept of safety factor is used to reflect the stress of different parts of pipeline based on the 4th strength theory. The safety factor of pipeline is outputted by FISH language in finite difference software FLAC3D, and the stability of pipeline is judged. Furthermore, the variation law of pipeline subsidence and safety factor in different mining stages of longwall mining is analyzed. The results provide a theoretical basis for monitoring and protection of buried pipelines in subsidence areas.
【作者单位】：中国地质大学(北京);中国地质环境监测院;
【基金】：国家自然科学基金资助项目“煤矿采动条件下浅埋输气管线变形机理研究”,41172266 国土资源部百名优秀青年科技人才计划资助项目“长输管线穿越地面塌陷区灾害风险评价方法研究”,2007
【分类号】：TD82;TE88
【正文快照】： 近年来,开挖造成的地面沉降和塌陷对埋地管道产生的影响不容忽视,油气管道的敷设很难避开开挖地段[1],特别是由于开矿留下的大量采空区严重制约了油气管道的建设和运营[2-3]。地表变形区的管道可能发生悬空甚至折断,沉陷盆地区的管道可能发生拉伸、压缩、弯曲等变形破坏,导致

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