The salvation operation to winch the 33 miners to the surface was scheduled to start during the night.
When the men are hauled out of the earth that has kept them prisoner longer than anybody on record, they will go from humid, dark isolation to a blaze of publicity normally reserved for the world’s biggest sporting or political events.
More than 1,700 journalists from around the world have turned up to record their salvation.
Each of the men is to be slowly winched up from the tunnel they took refuge in after an August 5 collapse in the upper galleries of their mine outside Copiapo, northern Chile.
The 622-metre ascent is almost as high as two Eiffel Towers, one on top of the other.
It will take around 15 to 20 minutes for the metal capsule enclosing each miner to arrive at the surface, and around an hour for the contraption to do a round trip to pick up the next man. At the camp near the mouth of the rescue shaft, a celebratory vibe already takes hold.
It was certain to go up another notch when Chilean President Sebastian Pinera, accompanied by Bolivian President Evo Morales, were to turn up to participate in the rescue operation.
Thirty-two of the miners are Chilean. One is Bolivian. They were said to be anxious as their freedom neared.
“They are praying to ease the tension,” said Alberto Segovia, who spoke at the weekend with his trapped brother Dario Segovia via videolink.
“He doesn’t want to be the first, because he’s afraid. No one wants to be the first. Can you imagine being brought up 700 metres?”
Another miner, Mario Gomez, was also “nervous, because of what they are all going through. There is a mix of heightened emotions down there, lots of anguish and joy,” said Rossana Gomez.
Andres Sougarret, the head engineer overseeing the rescue operation said possible problems had been looked at and solutions worked out.
Falling rocks or damage to the narrow cradle could occur, Dr Sougarret said. “But we’ll have the means to unblock them.”
Though officials have refused to say in what order the men will emerge, they have said the first group to exit will include some of the strongest men.
Those with chronic health problems including high blood pressure or respiratory ailments will go next, followed by a final group of healthy miners.
Before the rescue begins, two mining experts and two Marine nurses will go into the mine and determine in which order the men will come out.
The narrow cage bringing up the men had been painted in the colours of the Chilean flag and baptised the “Phoenix” to symbolise the rebirth the miners were to experience on rediscovering the surface.
Each will wear medical sensors to monitor stress levels, and a camera and microphone system will keep them in constant contact with officials.
Should the capsule become blocked from above, the miner inside can detach the cage and slowly lower themselves back down.
If all goes to plan, though, the miners will be brought out and straight into the care of doctors standing by. Two or three close relatives will be able to see them then, too.