采动地表移动变形对长输管道影响评价研究

发布时间：2018-10-04 22:40

【摘要】：长距离管道输送(简称长输管道)是线性构筑物,油气长输管道即不但连续输送距离长,而且具有特殊的安全要求。油气长输管道作为一种连续快速的油气输送方式近年来在我国快速发展,长输管道敷设通过矿区已开采沉陷区和未开采区已经成为长输管道必须研究解决的重要难题之一,论文针对未开采区已经敷设管道条件下,开采引起地表移动变形破坏对管道影响进行评价研究。在分析采动地表沉陷盆地特征和地表移动变形基本规律的基础上,将地表移动变形损坏形式划分为地表连续移动变形、非连续移动变形和随机移动变形破坏三种类型,结合油气长输管道线性构筑物受力力学特性和采动影响下地表变形基本特征,借鉴已有研究成果的基础上,给出了地表下沉量与沉陷区管道相对关系,地表移动变形过程管道受力分析和管道最大下沉量计算方法。在分析影响地表移动变形主要因素及长输管道力学特征的基础上,结合沉陷区灾害发生机理,建立了煤矿沉陷区油气长输管道安全评价指标体系,构建了评价管道安全可靠性的模糊综合评价模型和管道安全评判指标,结合陕京管道工程实例,运用模糊综合评价模型,结合沉陷区管道受力和最大下沉量计算结果对比检验,确定管道的安全等级。
[Abstract]:Long distance pipeline (long distance pipeline) is a linear structure. Long distance oil and gas pipeline is not only continuous transportation distance, but also has special safety requirements. As a continuous and rapid way of oil and gas transportation, long-distance oil and gas pipeline has developed rapidly in China in recent years. The laying of long distance pipeline through mining subsidence area and unmined area has become one of the important problems that must be studied and solved in long distance pipeline. In this paper, the influence of surface movement, deformation and failure caused by mining on pipeline is studied under the condition that pipeline has been laid in unmined area. On the basis of analyzing the characteristics of mining subsidence basin and the basic law of surface movement deformation, the surface movement deformation damage form is divided into three types: surface continuous movement deformation, discontinuous moving deformation and random moving deformation failure. Combined with the mechanical properties of linear structures and the basic characteristics of surface deformation under the influence of mining, the relative relationship between surface subsidence and pipelines in subsidence area is given on the basis of existing research results. The stress analysis of pipeline and the calculation method of maximum subsidence of pipeline in the process of surface movement and deformation. Based on the analysis of the main factors affecting the surface movement and deformation and the mechanical characteristics of long distance pipeline, combined with the mechanism of disaster in subsidence area, the safety evaluation index system of long distance oil and gas pipeline in subsidence area of coal mine is established. The fuzzy comprehensive evaluation model for evaluating pipeline safety reliability and the pipeline safety evaluation index are constructed. Combined with the example of Shanjing pipeline project, the fuzzy comprehensive evaluation model is used, and the results of the calculation of pipeline stress and maximum subsidence in subsidence area are compared and verified. Determine the safety level of the pipeline.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD325;TE832

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