一种基于分层约束的露天矿DEM构建方法

针对边坡的台阶状地形特征是露天矿地形表达的关键和难点问题,该文基于边坡台阶要素的空间关系建立边坡层次关系模型,采用一种逐层加入扩展点和约束线的方法生成扩展约束TIN模型,将某露天煤矿作为实验区,实现了露天矿DEM的动态建模。结果表明:提高了边坡坡面的层级可视化效果,保持了地形结构的完整性,实现了边坡实体单元的分层次表达,能够获得不同水平层次的DEM数据。基于边坡特征分析的分层约束方法为露天矿DEM的构建提供了一种思路,可为边坡监测、灾变分析和灾情预测等领域提供精确的地形数据。

A method of building the open-pit mine DEM based on hierarchical constraint TIN

According to the bench-controlled characteristics of the slope is the key problem and difficulty of the open-pit mine terrain expression,the slope hierarchy model is established based on the research of the spatial relations of the slope bench features.By increasing extension points and feature lines of the slope to the TIN hierarchically,the controlled extension TIN model can be built.The dynamic DEM is established for an experiment of an open-pit coal mine.The results show that this method can enhance the hierarchy visualization of the slope surface,keep the integrality of the terrain structure,provide the layered slope entity unit and obtain the different hierarchical level data of DEM.This method not only gives a new way for building open-pit mine DEM,but also provide the exact terrain data for many application fields,such as the slope monitoring,the disaster analysis and the disaster forecasting etc.