The predisposition of a slope to generate rockfalls is related to the intensity of rock mass jointing and the geometric arrangement of discontinuities intersecting the rock face. With the increasing use of terrestrial laser scanner (TLS) in rock slope surveying, methods have been proposed to semi-automatically extract the spatial properties of outcropping discontinuities from high-resolution topographic data. The present paper builds upon one of such methods (named DiAna), and extends it to enhance the assessment of rockfall susceptibility over steep rock walls. In particular, a Matlab routine (named DiAna-K) that incorporates a full three-dimensional derivation of kinematic analysis principles is introduced. Kinematic tests for plane, wedge, block toppling, flexural toppling, and free fall failure are formulated by explicitly accounting for the presence of overhanging areas of the rock face as well as varying frictional strengths across different discontinuity sets, planes, or intersections between planes. Results from a test application at an abandoned quarry site highlight the ability of the proposed procedure to provide detailed insights into the kinematic feasibility of structurally controlled instabilities. They also demonstrate the importance of properly defining failure mechanisms over steep (and usually undersampled) topographies in order to derive realistic quantifications of rockfall hazards.

斜坡产生落石的倾向与岩体节理的强度和与岩面相交的不连续性的几何排列有关。随着地面激光扫描仪（TLS）在岩石边坡测量中的使用越来越多，已经提出了从高分辨率地形数据中半自动提取露头不连续空间特性的方法。本论文建立在其中一种方法（名为 DiAna）的基础上，并将其扩展以加强对陡峭岩壁上落石敏感性的评估。特别是，介绍了一个包含运动学分析原理的完整三维推导的 Matlab 例程（名为 DiAna-K）。平面、楔形、块状倾倒、弯曲倾倒的运动学测试，和自由落体破坏是通过明确考虑岩面悬垂区域的存在以及不同不连续组、平面或平面之间的交叉点的不同摩擦强度来制定的。在废弃采石场进行的测试应用结果突出表明，所提出的程序能够详细了解结构受控不稳定性的运动学可行性。他们还证明了正确定义陡峭（通常是采样不足）地形的失效机制的重要性，以便得出落石危险的真实量化。在废弃采石场进行的测试应用结果突出表明，所提出的程序能够详细了解结构受控不稳定性的运动学可行性。他们还证明了正确定义陡峭（通常是采样不足）地形的失效机制的重要性，以便得出落石危险的真实量化。在废弃采石场进行的测试应用结果突出表明，所提出的程序能够详细了解结构受控不稳定性的运动学可行性。他们还证明了正确定义陡峭（通常是采样不足）地形的失效机制的重要性，以便得出落石危险的真实量化。