基于InSAR技术的神木、府谷煤矿开采沉降监测及开采过程反演

Monitoring of coal mining subsidence and inversion of mining process in the Shenmu and Fugu based on InSAR technology

为有效监测因长期地下开采导致的陕西省北部地区发生的持续性地面沉降现象,本文依托实际项目,利用SBAS-InSAR技术对覆盖神木、府谷2020年1月8日—2020年11月27日的Sentinel-1数据进行处理,获取观测时间段内由于地下开采而导致的地面沉降的范围和深度,利用D-InSAR技术对该地区某一开采工作面进行反演。同时,将SBAS-InSAR监测结果与水准数据进行对比验证,差值在1.8~8.1 mm之间,满足监测精度要求,证明了SBAS-InSAR技术在监测矿区地表沉降方面的可靠性;将D-InSAR反演结果与矿方提供的资料进行对比发现二者具有一致性,证明了D-InSAR技术在反演煤矿开采进程方面的可行性。

In order to effectively monitor the continuous land subsidence phenomenon in northern Shaanxi Province caused by long-term underground mining,this paper relies on a practical project,uses SBAS-InSAR technology to process Sentinel-1 data covering Shenmu and Fugu from January 8,2020 to November 27,2020,and obtains the scope and depth of ground subsidence caused by underground mining during the observation period.The D-InSAR technique is used to invert a mining face in this area.At the same time,the SBAS-InSAR monitoring results are compared with the level data,and the difference is between 1.8 and 8.1 mm,which met the monitoring accuracy requirements,and proved the reliability of SBAS-InSAR technology in monitoring the surface subsidence of mining areas.By comparing the D-InSAR inversion results with the data provided by the mine,it is found that the two are consistent,which proves the feasibility of D-InSAR technology in the inversion of coal mining process.