The application of 3-D laser scanning technology in rock joint sets identification
Bingshun He · Journal of China Institute of Water Resources and Hydropower Research · 2007
The joint sets of rock mass are commonly identified by means of compass today.There are lots of shortcomings with this traditional method.The long distance high resolution 3-D laser scanning technology(LIDAR) provides new methods that may replace the traditional one.The procedures of semiautomatic and automatic methods with their engineering application to rock face identification have been introduced in this paper.The semiautomatic method will transform the coordinate system and get the stratum-dip direction and stratum-dip angle by fitting the plane from the scanning points.The automatic method will reconstruct the surface and utilize the fuzzy K mean clustering method to cluster the facets.The K value of the fisher distribution is the key index to justify the clustering method and to filter non-key points off.Finally the dominant joint sets and their direction of the outcrop will be obtained when the K value is big enough.A case study of application of the automatic method is presented.The result reveals that LIDAR is applicable to exploitation of rock mass.