摘要
近年来,随着开采深度和边坡高度的不断增加,内蒙古宝日希勒露天矿区边坡稳定性问题日益突出,对矿区周围的工矿设备和工作人员的生命安全构成了威胁。2020年4月30日,该矿区工作帮发生体积约130万m~3的大型滑坡,为研究此次边坡滑前的形变特征,本文采用39景Sentinel-1A卫星IW模式序列影像,以时序合成孔径雷达干涉(InSAR)技术为处理方法,获取了2019年1月4日至2020年4月28日矿区边坡滑移前的形变信息。经分析,该矿区东侧工作帮在监测时段内存在明显形变迹象,边坡滑移区域最大形变量超过1 000 mm,且结合光学影像发现东侧边坡南端后缘于临滑前已出现明显的拉裂痕迹,InSAR监测结果与光学影像上滑坡发生后的轮廓位置相吻合。该结果表明InSAR技术在露天矿区边坡稳定性评价方面有很好的应用潜力,它能够在快速获取影像覆盖范围内各露天矿区边坡形变信息的基础上,为地面监测设备布设位置的合理选择提供指导。
In recent years,with the increase of mining depth and slope height in Baorixile open-pit mining area in Inner Mongolia,the problem of slope stability has become increasingly prominent,which poses a threat to the safety of mining equipment and workers around the mining area.On April 30,2020,a large landslide with a volume of about 1.3 millionm 3 occurred in the working slope of the mining area.In order to study the deformation characteristics of the slope before sliding,39 scenes of sentinel-1A satellite IW mode series SAR images and time-series InSAR technology were applied to obtain the deformation information before the slope sliding from January 4,2019 to April 28,2020.According to the analysis,there were obvious deformation signs in the east working slope of the mining area during the monitoring period,and the maximum deformation of the slope slip area is more than 1000 mm.Combined with optical images,it was found that obvious tensile crack marks had appeared at the southern end of the east slope before the landslide.The InSAR monitoring results were consistent with the contour position of the landslide on the optical image.The results showed that InSAR technology had a good application potential in the slope stability evaluation of open-pit mining area.It could quickly obtain the slope deformation information of each open-pit mining area within the scope of image coverage,and provide guidance for the reasonable selection of ground monitoring equipment location.
作者
殷幼松
王娜
李晓芳
刘广全
李杰
YIN Yousong;WANG Na;LI Xiaofang;LIU Guangquan;LI Jie(EarthStar Incorporation,Huzhou Zhejiang 313200,China)
出处
《北京测绘》
2021年第6期818-822,共5页
Beijing Surveying and Mapping
作者简介
殷幼松(1990-),男,安徽寿县人,硕士,工程师,从事时序InSAR技术工程化应用研究。E-mail:18813119534@163.com。
