基于D-InSAR技术的金矿老采空区下沉监测与位置反演  

Subsidence Monitoring and Position Inversion of Old Goaf in Gold Mine Based on D-InSAR Technique

作　　者：王远坚 齐麟 姜岳 袁鑫 李鹏宇 徐永梅[1] Wang Yuanjian;Qi Lin;Jiang Yue;Yuan Xin;Li Pengyu;Xu Yongmei(College of Geomatic and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;College of Geoscience and Surveying Engineering,China University of Mining & Technology(Beijing),Beijing 100083,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《金属矿山》2019年第10期68-73,共6页Metal Mine

摘　　要：为合理回收黄金资源,山东某黄金矿山对部分浅部老采空区残留的矿体进行了再次开采,重复采动破坏了地层的应力平衡状态,引起了老采空区"活化",导致地表发生移动变形,对地面建(筑)物带来了损害影响。为控制地表下沉危害,需要对"活化"的老采空区进行注浆处理,从而有必要准确确定"活化"采空区的位置。利用地表下沉信息反演"活化"采空区位置,结合合成孔径雷达差分干涉测量技术(Differential Interferometry Synthetic Aperture Radar,D-InSAR),运用ALOS-1卫星和哨兵1A卫星数据提取了该矿区部分时间段的下沉量分布信息,并将D-InSAR监测结果与前期水准实测数据相结合,分析了矿区下沉的变化规律,确定了岩层移动参数,反演出了"活化"采空区的位置。研究表明:该矿区下沉活动仍在发生,但下沉速率明显放缓,2007年以后采取的充填治理方案效果显著;尽管金矿开采地表下沉量较小,应用D-InSAR技术仍然能够快速获取下沉信息,可进一步根据地表下沉信息反演"活化"采空区的具体位置。研究结果可为矿区采用D-InSAR技术监测地表沉陷以及反演矿井地下开采空间的动态发展过程提供有益参考。In order to recover the gold resources reasonably,some residual orebodies in the old goaf in the shallow part of a gold mine in Shandong Province have been mined repeatedly.The repeated mining has destroyed the stress balance state of the strata,"activated" the old goaf and resulted in the moving deformation of the surface,which brings large damage to the buildings and structures on the surface.In order to control the surface subsidence damage,the "activated" old goaf needs to be treated by grouting,so it is essential to determine the position of the "activated" goaf.By using the surface subsidence information,the location of the "activated" goad can be reversely deduced.The D-InSAR(differential interferometry synthetic aperture radar)technique,combining with the data of ALOS-1 and Sentinel-1 A satellites,is adopted to extract the mining subsidence distribution at part of time.With integration of D-InSAR monitoring results and the previous measured data,the change law of mining subsidence are analyzed to determine rock movement parameters and deduce the location of "activated" goad.The study results illustrate that the subsidence is still happening in this gold mine,but the subsidence rate is obviously slowed down,the filling treatment scheme adopted after 2007 has a significant effect;although the mining surface subsidence of gold mines is relatively small,D-InSAR can quickly obtain the subsidence information,and accurately deduce the specific location of "activated" goaf based on the surface subsidence information.The above study results can provide reliable reference for monitoring mining subsidence and inversely deducing the dynamic development process of underground mining based on D-InSAR technique.

关 键 词：开采沉陷 老采空区 D-InSAR监测 采空区位置反演 

分 类 号：TD325[矿业工程—矿井建设]