Table 3: Potential shaft lengths of simple shafts in case of a vadose zone with various thickness.

α1 α2 H (m) f.a.h. H (m) f.a.h. H (m) f.a.h. H (m) f.a.h. H (m) f.a.h.
100 200 300 400 500
- 0° - - - - -
- 10° 588.23 5.88 1176.47 5.88 1764.70 5.88 2352.94 5.88 2941.18 5.88
- 20° 294.11 2.94 588.23 2.94 882.35 2.94 1176.47 2.94 1470.59 2.94
30° (60°) 30° 200.00 2.00 400.00 2.00 600.00 2.00 800.00 2.00 1000.00 2.00
40° (50°) 40° 156.25 1.56 312.5 1.56 468.75 1.56 625.00 1.56 781.25 1.56
50° (60°) 129.87 1.30 259.74 1.30 389.61 1.30 519.48 1.30 649.35 1.30
60° (30°) 114.94 1.15 229.89 1.15 344.83 1.15 459.77 1.15 574.71 1.15
70° (20°) 106.38 1.06 212.77 1.06 319.15 1.06 425.53 1.06 531.91 1.06
80° (10°) 102.04 1.02 204.48 1.02 306.12 1.02 408.16 1.02 510.20 1.02
90° (0°) 100.00 1.00 200.00 1.00 300.00 1.00 400.00 1.00 500.00 1.00

h: Thickness of the vadose zone; α1 : Inclination of the fracture and fault; α2 : Bed inclination; f.a.h.: Specific shaft length.
The number in brackets refers to the degree of the deviation from vertical.