Fig. 5. (a) Temperature and (b) saturation evolution just above the crown of the drift in the center of the test cell (x = 0 m, y = 0 m); (c) gives the evolution of the distance of the boiling isotherm above the drift crown, measured in the center of the test cell (x = 0 m, y = 0 m). The time axis scale is identical in all three graphs; M = matrix, F = fracture.