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近年来煤矿开采引起的地面塌陷已影响了油气管道的安全运营,我国煤矿采空区上方埋地管道的安全性评判标准及稳定性量化标准尚不成熟,对长壁开采过程中不同开采阶段引起的管道变形破坏特征尚未研究。利用安全系数的概念反映管道不同部位的应力情况,基于第四强度理论,应用有限差分软件FLAC3D中的FISH语言输出管道的安全系数,判断管道的稳定性,进而分析了长壁开采过程中不同开采阶段管道的下沉和安全系数的变化规律。研究结果为沉陷区埋地管道的监测和防护提供了理论依据。
In recent years, ground subsidence caused by coal mining has affected the safe operation of oil and gas pipelines. The safety evaluation criteria and stability quantification standards for buried pipelines above coal mined areas in China are not yet mature, which have caused different mining stages in longwall mining The characteristics of pipe deformation and failure have not been studied. The concept of safety factor is used to reflect the stress in different parts of pipeline. Based on the fourth strength theory, the safety coefficient of pipeline is output by FISH language in finite difference software FLAC3D, and the stability of pipeline is judged. Then the different mining methods in longwall mining Stage pipe sinking and safety factor changes. The results provide a theoretical basis for the monitoring and protection of buried pipelines in subsidence area.