Table 8: Effect of the amount and height of the simultaneous cooling zone on temperature stress.

Case Height of the simultaneous cooling zone (m) Basic restrain zone simultaneous cooling measure Maximum temperature at the high restraint zone (°C)Maximum tensile stress in the high restraint zone
(Mpa)Elevation (m)Safety coefficient

Case  11818 m below the 3,300 m elevation
Simultaneous cooling during the middle and second stages

Case  218 + 27On the basis of case 1, adding 27 m above the 3,300 m elevation24.151.403304.51.81

Note: (1) 18 + 27 means that the first simultaneous cooling zone is 18 m, and the second one is 27 m.