基于SAR偏移量追踪技术的露天矿大梯度形变监测

Big Gradient Deformation Monitoring in Open-pit Mine Based on SAR Offsets Tracking Techniques

首先分析了不同参数对偏移追踪计算结果的影响,其次在SNAP8.0的偏移追踪工具中添加基于纹理特征的偏移量追踪法,两种偏移量追踪方法相结合对Sentinel-1升、降轨数据进行了处理,根据升、降轨观测几何解算出露天矿二维形变量。结果显示,在排土场、开采区和剥离区一共有6处大梯度形变区域,垂直向和东西向形变量范围为-42.41 m~40.71 m、-50.41 m~42.80 m,剥离区垂直向和东西向形变量达到最大,分别为-42.41 m、-50.41 m,识别的大梯度形变主要位于采掘和排土作业等频繁的区域,因此SAR偏移量追踪技术可对露天矿生产作业区的形变进行有效监测,以保障矿区安全生产和生活。

The influence of different parameters on the offset tracking calculation results was analyzed.Then,the offset tracking method based on texture features was added to the offset tracking tool of SNAP8.0.Two offset tracking methods were combined to process the Sentinel-1 ascending and descending data.Two-dimensional deformation of the open-pit mine were calculated according to the geometry of ascending and descending observation.The results show that there are 6 large gradient deformation areas in waste dump,mining area,and stripping area.Vertical and east-west deformation ranges from-42.41 m to 40.71 m and-50.41 m to 42.80 m,respectively.In stripping area,vertical and east-west deformation reaches the maximum,which is-42.41 m and-50.41 m,respectively.The identified large gradient deformation is mainly located in the areas with frequent mining and dumping operations,Therefore,SAR offset tracking technology can effectively monitor the deformation in operation area of open-pit mine,so as to ensure the safe production and life in mining area.