利用差分干涉测量技术监测煤矿区开采沉陷变形的初步研究

近年来,差分干涉测量技术（D-InSAR）越来越多地被应用于地表沉陷变形监测方面,如地震、地下水过度开采等造成的地表形变,地下煤炭资源开采所造成的地表形变具有影响空间范围小、沉降速度缓慢的特点,而差分干涉测量的精度又易受大气、时间和空间基线等因素的影响,因此,利用D-InSAR对煤炭资源开采沉陷所造成的形变进行监测,具有更大的难度。为了验证D-InSAR技术对于该类沉陷的监测能力,选择了地表观测记录资料较为翔实、沉陷灾害比较严重的山西潞安矿区作为研究区域。结果表明,利用D-InSAR技术可以比较容易地确定地表沉陷的位置和分布范围,具备监测采煤沉陷地表变形的能力。下一步的研究,是希望建立基于D-InSAR技术的稳健、经济、高效的煤矿区开采沉陷变形监测系统。

Preliminary study on monitoring mine subsidence deformation based on D-InSAR technique

Recently D-InSAR technique has been widely adopted to monitor land subsidence deformation caused by earthquake, withdrawal of water and minerals. But monitoring subsidence caused by underground coal mining is more difficult because of its small spatial extent and slow velocity. D-InSAR is liable to be contaminated by atmosphere delay, temporal decorrelation and baseline errors. Luan-Mine, Shanxi province has thousands of valuable leveling data, smooth topography and severe subsidence, it becomes a nice place to test and analyze D-InSAR technique. The result demonstrates that D-InSAR can detect subsidence within 2 months and point out its distribution and scope. The final interest of research is to establish a robust, cost efficient mine subsidence monitoring system by using D-InSAR technique.