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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。
Stepped terrain features for the slope are the key and difficult issues in the terrain expression of the open pit mine. Based on the spatial relationship of the slope step elements, a hierarchical relationship model of the slope is established, and a method of adding extension points and constraint lines layer by layer is adopted Extended constrained TIN model, an open pit mine as the experimental area, to achieve the dynamic modeling of opencast DEM. The results show that the hierarchical visualization of slope slope is improved, the integrity of the terrain structure is maintained, and the hierarchical expression of solid units of the slope is realized, and the DEM data of different levels can be obtained. The hierarchical constraint method based on slope characteristics analysis provides an idea for the construction of opencast mine DEM, which can provide accurate topographic data in the fields of slope monitoring, catastrophe analysis and disaster prediction.