近年来随着对天然气资源的大量需求，以及环境保护迫切需要，我国天然气管道工程的建设也进入一个高峰期，天然气资源以管道输送为主，输送管道是大范围延伸分布的线性工程，其不可避免地要通过一些煤矿采空沉陷区和地质构造复杂区域。煤矿采空沉陷区的地表移动变形必然对在建和在役天然气管道产生一定的影响或危害。研究煤矿采空沉陷区天然气管道的危险性评价，对于保障天然气管道安全正常运营，降低管道铺设、维护成本，充分利用地下矿产资源均具有重要的意义。 论文以西气东输二线位于恒发煤矿采空区的DD245~DD246段输气管道工程为研究背景，结合开采引起地表移动变形破坏规律及管道结构特征，在分析适合不同采矿地质条件下地表移动变形的基础上，划分了相应的地表移动变形预计模型。通过对影响地表移动变形主要因素的分析，根据采空沉陷区的类型和特征按开采深度与开采厚度之比、开采方法、顶板管理方法、采空沉陷区形成时间等采矿地质条件对采空沉陷区的稳定性进行分类。应用层次分析法建立以开采方法、采空沉陷区形成时间、覆岩岩性、开采深厚比、水平变形、曲率半径、倾斜、下沉值及采空区类型为主要指标的评价体系，依据评价体系划分不同危险性等级，同时针对不同危险性等级采取相应的处置措施。论文结合西气东输二线输气管线宁陕支线进行实例论证，表明恒发煤矿采空沉陷区天然气管道的危险性评价的结果与实际影响情况相吻合，同时给出了处置办法。

With the high demand for natural gas resources, as well as an urgent need for environmental protection in recent years, the construction of the natural gas pipeline project has also entered a peak period in china, natural gas resources transport by pipeline, transmission pipeline engineering is extending the distribution a wide range of linear, its is not available to avoid through the coal mining subsidence and tectonic complex region. Mined subsidence of ground movement and deformation inevitable in service natural gas pipeline or under construction produce a certain impact or harm. Study coal gob the subsidence gas pipeline risk assessment for normal operation to protect the safety of natural gas pipelines, reducing the pipe-laying, maintenance costs, and full use of underground mineral resources are of great significance. Paper to the Second West-East gas pipeline Hengfa coal mining area DD245 ～ DD246 gas pipeline project as research background, combined with mining-induced ground movement and deformation failure regularity and piping structural characteristics, surface movement and deformation analysis suitable for different mining geological conditions divided on the basis of the corresponding surface movement and deformation prediction model. Through the analysis of the impact of ground movement and deformation of the main factors, according to the type and characteristics of the mined subsidence depth of mining and mining thickness ratio, mining methods, roof management method, mined subsidence formed time and other mining geological conditions of mined area stability classified. Mining method, gob subsidence formed, overlying rocks in deep mining ratio, horizontal deformation, the radius of curvature, inclined, type as the main indicator of the sinking value of the mined-out area evaluation system using analytic hierarchy process, according to the evaluation the system is divided into different risk levels, and take the appropriate measures to deal with different risk levels. The paper combines the Second West-East gas pipeline the line Ningshan Extension examples, we demonstrate that David Carse, coal mining the empty subsidence gas pipeline risk assessment results and the actual impact of consistent and disposal options.