Measurements to characterize discontinuities of quarry faces of chalk “Monte Tondo” in Riolo Terme (Italy) through terrestrial 3d laser scanning method and to compare them at survey techniques data traditional

This paper describes the results of a study to characterize discontinuities of chalk quarry faces "Monte Tondo" in Riolo Terme (Italy) by means of 3D laser scanning and at the same time to compare survey techniques data traditional. One of the major advantages of 3D laser scanning method is an unbiased, rapid and accurate discontinuity analysis. With 3D laser scanning it is possible to measure quarry rock faces whose access is limited or also slopes along highway lines where working conditions are hazardous. The 3D laser scanning method is also cheaper of the traditional manual survey and analysis methods. Laser scanning is a relative new surveying technique, where every point of a data set, so-called “cloud points” represents a point in 3D space of the scanned rock surface. Making to vary the density of the “cloud points” a accurate reconstruction of the original rock surface can be obtained in the form of an 3D interpolated and meshed surface, using different interpolation techniques. Through geometric analysis of this mesh 3D, is possible to characterize surfaces, which represent different rock masses discontinuity sets.