采空区地表沉降监测对在役管道影响分析

Analyses on the Influence of Surface Subsidence Monitoring in Goaf on Inservice Pipeline

煤矿采空区导致的地表沉降或塌陷是常见的一种地质灾害形式,由于地层产生较大的竖向和侧向变形,导致管道产生局部应力集中,甚至发生管道失效的情况。基于GNSS监测和InSAR形变监测,对煤矿开采采空区的地表变形规律进行点、线、面的还原,并对两种测量数据的优缺点进行对比分析。总结出管道周边地表变形在时间上的变化规律,为后期管道安全性校核提供必要的判定依据。

Surface subsidence or collapse caused by goafs in coal mines is a common form of geological disasters.Due to the large vertical and lateral deformation of the formation,the local stress concentration and even the failure of pipeline occur.In this paper,based on GNSS monitoring and InSAR deformation monitoring,the surface deformation law of coal mining goaf is restored by points,lines and planes,and the advantages and disadvantages of two measurement data are compared and analyzed.Finally,this paper summarizes the time variation law of surface deformation around the pipeline,which provides the necessary judgment basis for the later pipeline safety check.