Issue 51

R. Basirat et alii, Frattura ed Integrità Strutturale, 51 (2020) 71-80; DOI: 10.3221/IGF-ESIS.51.06 73 rock samples and the field rock mass were from the same site. Six samples were collected from each region (12 samples in total). Tab. 1 shows the diameter and height of the core samples. Then, fractures in the core samples were extracted using a CT-Scan device (Model: Bright Speed) (Fig. 3). Fig. 4 presents the core samples and CT-scan records for two studied regions. The output of the CT-scan device is sliced with a spacing of 0.1 mm in three perpendicular directions. Region 1 (Fig. 1.a) Region 2 (Fig. 1.b) No. Diameter (cm) Height (cm) No. Diameter (cm) Height (cm) A1 9 22.1 B1 5.4 13.9 A2 9 23 B2 9 14.1 A3 9 19.1 B3 9 19.6 A4 5.4 22.2 B4 9 19.3 A5 5.4 24.5 B5 5.4 25.8 A6 5.4 17.3 B6 5.4 19.9 Table 1: The size of core samples for two study regions Figure 2: Two examples of limestone rock mass outcrops with FN