【摘要】 采煤沉陷引起的地表移动变形会对天然气管线造成损坏性影响,从管线坡度的变化、竖曲线的变化、横向移动变形、水平拉伸和压缩变形及管道应力变化等方面分析了采煤沉陷对天然气管线的影响问题;描述了采煤地表移动变形时间过程中的初始期、活跃期和衰退期地表下沉量和所经历的时间过程;在考虑地表下沉还没有达到完全稳定结束及存在部分残余下沉量的情况下,讨论了地表沉陷残余变形的计算方法;最后给出了在采煤沉陷区上方建设天然气管线的安全技术措施。更多还原

【Abstract】 For surface movement deformation caused by coal miming subsidence will give rise to damage influence,even cause great safety accident.Based on this,the target of the text is to scientifically appraise dynamic development of surface deformation in subsidence area and its influence to groundwork stability of natural pipe,and then adopt some technical measures to ensure safe circulation of natural pipeline.Starting from this target,the text analyses the influence to natural pipeline from coal mining subsidence in the way of pipeline grade variation,vertical curve variation,landscape orientation deformation,horizontal pull and compression deformation and pipe stress etc;the text describes detailed surface subsidence product and its used time among initial phase,active phase and decline phase in the course of surface movement deformation time;in the context of considering surface subsidence that doesn’t reach basic latter end and residual subsidence product,the text discussion the calculation method of residual deformation in surface subsidence area;over the analyisi above,the text gives the technical measures about building natural gas pipeline on subsidence area.更多还原