中文摘要：

崩塌危岩多发育在高陡的斜坡地带，具有隐蔽性与突发性，经常造成重大人员伤亡与财产损失。因采用传统测量方法难以得到危岩体规模、负地形、不利结构面组合特征，进而判识危岩失稳模式与预测危害性，故危岩体的调查一直是地质灾害防治较为突出的难题。三维激光扫描技术通过激光反射，快速获取危高位危岩体点云特征，非接触得到所需的高陡斜坡危岩体几何与地质信息，获取传统测量无法得到的成果。本文以Optech扫描仪在高位危岩体调查中的应用为研究基础，阐述了该项技术在高陡斜坡地形图生成、节理裂隙统计、规模计算等方面的应用。并以旧关岭崩塌与南川甑子岩危岩体调查为例，诠释了激光扫描应用过程中的方法与技巧，为高陡危岩体的调查提供参考。

英文摘要：

Collapse and unstable rock often occurs in the high and steep slope zone. It has a sudden and concealment, and usually causes significant casualties and property losses. Because the traditional measurement method is difficult to get scale of dangerous rock mass, the existence of negative terrain, characteristics of unfavorable combination of structural plane, also hard to judge the instability mode and forecasts the harmfulness. So the investigation of unstable rock has been a glaring problem of geological disaster prevention. The emergence of 3D laser scanning technology provides a means to solve the problem. It can quickly get the point could of high rock with laser reflection. So we could get the geological information and geometrical information by the method of non-contact measurements. Through that we can obtain observation results which couldn＇t achieve by traditional measurement. This paper depends on the Optech scanner used in the dangerous rock collapse survey, so as to describe the application of the technology in the generation of topographic maps, jointed statistics, and volume calculation, etc. And the method and technique of laser scanning application processes are elaborated with the example of JiuGuanling collapse and Nanchuan Zenziyan dangerous rock. It provides a reference for the investigation of high and steep dangerous rock mass.