Abstract: Traditional approach of investigating high slope perilous rock is very difficult and dangerous. Three-dimensional laser scanning with high efficiency, high accuracy and remote non-contact measurement makes up the deficiencies of traditional geological investigation methods. By 3-D laser scanning, traditional geological investigation process can be optimized. Moreover, with the development of indoor data processing softwares, quantitative analysis on perilous rocks can be conducted, for instance, the measurement of geometric dimension of perilous rock, highly accurate real tangent geologic profile, measurement of structural plane occurrence, trace length, connectivity rate and spacing, as well as the acquisition of space coordinate and the determining of perilous rock body boundary. In addition, by redeveloping post processing software for 3-D laser scanning and establishing rock stability assessment system, the feasibility has been proved in theory. Thus it can be seen, 3-D laser scanning has broad application and prospect in geological exploration.

Key words: perilous rockmass, high slope, 3-D laser scanning, diversified application