开采沉陷区埋地管道变形及力学特征分析

doi:10.16265/j.cnki.issn 1003-3033.2020.10.012

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (10): 82-89.doi: 10.16265/j.cnki.issn 1003-3033.2020.10.012

开采沉陷区埋地管道变形及力学特征分析

任建东¹, 王文¹ 副教授, 董淼² 高级工程师, 高诗松³ 高级工程师

1 河南理工大学能源科学与工程学院,河南焦作 454003;
2 中国石油化工集团有限公司华北油气分公司,河南郑州 450007;
3 西安多维测绘工程有限公司,陕西西安 710003

收稿日期:2020-07-02 修回日期:2020-09-05 出版日期:2020-10-28 发布日期:2021-07-15
作者简介:任建东 (1993—),男,河南三门峡人,硕士研究生,主要研究方向为开采损害与保护。E-mail:renjd-hpu@foxmail.com。
基金资助:
国家重点研发计划项目(2018YFC0604502);河南省产学研合作计划项目(172107000016);河南省高等学校青年骨干教师培养计划项目(2019GGJS053)。

Analysis of deformation and mechanical characteristics of buried pipelines in mining subsidence areas

REN Jiandong¹, WANG Wen¹, DONG Miao², GAO Shisong³

1 School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China;
2 North China Oil and Gas Branch, China Petroleum & Chemical Corporation, Zhengzhou Henan 450007, China;
3 Xi'an Multidimensional Surveying and Mapping Engineering Co., Ltd., Xi'an Shaanxi 710003, China

Received:2020-07-02 Revised:2020-09-05 Online:2020-10-28 Published:2021-07-15

摘要/Abstract

摘要： 为研究气煤重叠区内煤层开采对天然气埋地管道的影响,采用理论分析和数值模拟研究采动影响下埋地管道的受力变形特征,建立不同开采程度埋地管道变形的数学模型,得出竖向应力作用下管道顶部受力状态由受拉转为受压、底部由受压转为受拉;水平应力作用下管道顶底部均受拉应力作用,拐点左侧与右侧受力方向相反。研究结果表明:开采沉陷区内埋地管道变形可由高斯函数表示;竖向应力作用下管道顶底部受力状态呈现上下反向对称、关于沉陷中心呈现左右对称;整体受力状态关于沉陷中心呈现左右对称。

关键词: 开采沉陷区, 天然气埋地管道, 数值模拟, 受力变形特征, 下沉曲线

Abstract: In order to study influence of coal seam mining on buried natural gas pipelines in gas-coal overlap areas, stress and deformation characteristics of pipelines under mining influence were studied by using theoretical analysis and numerical simulation, and a mathematic model for deformation under different mining levels was established. It was obtained that stress state at top of pipelines changed from tension to compression and the other way round for bottom part under vertical stress, while under horizontal stress, both top and bottom parts were subject to tensile stress, and direction of force on left and right sides of inflection point was opposite. The results show that deformation of buried pipelines in subsidence areas can be represented by Gaussian function. And under vertical stress, stress state of top and bottom parts shows reverse symmetry up and down while left-and-right symmetry regarding subsidence center. Entire force state of pipelines is left-and-right symmetrical surrounding subsidence center.

Key words: mining subsidence area, buried natural gas pipeline, numerical simulation, force and deformation characteristics, subsidence curve

中图分类号:

X944.4

任建东, 王文, 董淼, 高诗松. 开采沉陷区埋地管道变形及力学特征分析[J]. 中国安全科学学报, 2020, 30(10): 82-89.

REN Jiandong, WANG Wen, DONG Miao, GAO Shisong. Analysis of deformation and mechanical characteristics of buried pipelines in mining subsidence areas[J]. China Safety Science Journal, 2020, 30(10): 82-89.

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开采沉陷区埋地管道变形及力学特征分析

Analysis of deformation and mechanical characteristics of buried pipelines in mining subsidence areas

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