Rock samples σc Range ( MPa) σc2 Range (average) (MPa) Standard deviation Reclassified σc2 (MPa)
BP2G (*22) BP2S (*26) BP3 (*15 ) BP5a (*8) BP2a BP5b S2 (*8) S2’ S5’ S5a’ 12.64 - 100.24 17.18 - 102.25 13.03 - 87.40 9.96 - 39.64 - - 10.98 - 36.64 - - - 12.63 - 97.22 (48.34) 17.03 - 97.26 (54.16) 12.76 - 85.55 (42.95) 18.88 - 64.49 (42.79) - - 8.85 - 35.23 (18.41) 6.26 - 34.89 (15.24) 6.83 - 20.79 (10.87) 5.33 - 28.70 (10.86) 21.07 21.27 23.98 16.33 - - - - - - 27.91 - 71.36 (*17) 32.53 - 72.31 (*17) 20.81 - 45.12 (*9) 34.73 - 59.56 (*5) 71.23 - 97.26 (*12) 12.63 - 31.67 (*11) - - - -