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。
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.
作者
任建东
王文
董淼
高诗松
REN Jiandong;WANG Wen;DONG Miao;GAO Shisong(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454003,China;North China Oil and Gas Branch,China Petroleum&Chemical Corporation,Zhengzhou Henan 450007,China;Xi'an Multidimensional Surveying and Mapping Engineering Co.,Ltd.,Xi'an Shaanxi 710003,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第10期82-89,共8页
China Safety Science Journal
基金
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)。
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
mining subsidence area
buried natural gas pipeline
numerical simulation
force and deformation characteristics
subsidence curve
