Copiapo, Chile (CNN) -- There may be light at the end of a nearly completed tunnel for the 33 men trapped since August 5 almost half a mile below ground, with rescuers expected to reach them within a day, Chile's mining minister said Friday afternoon.
"Hopefully before that," Mining Minister Laurence Golborne told reporters about the time when a rescue drill is expected to pierce the roof of the mine. As of Friday afternoon, it was 40 meters (about 130 feet) away. "Maybe tomorrow morning, early Saturday. We have to wait and see."
Once the mine has been reached, the rescue process could begin within three to four days, Golborne told reporters. But mine engineers must decide first whether they need to encase the shaft with steel tubing to prevent rockfalls and further collapses during the extraction process. "If we do a full casing of the hole, those three to four days could go to eight to 10 days," Golborne told reporters.
One of the rescue coordinators, Rene Aguilar, an engineer for state copper company Codelco, said this week they may encase just the first 100 meters (328 feet) of the shaft, a process that could take just 10 hours.
Before anyone can be rescued, the hole must be widened so that the rescue capsule -- dubbed the Phoenix -- can land cleanly inside the tunnel without getting hung up on obstructions, Golborne said. To accomplish that, explosives will be lowered to the miners for use in widening the shaft, said Golborne, who expressed little concern that the subterranean pyrotechnics would pose any danger to the men.
"We have to take into consideration that we are talking here about miners that have experience, many of them are licensed to use explosives, they know how to manipulate them, they have already made the holes that they need to set the right quantities of explosives. ... So it will be a very controlled explosion that will be made after we break into the tunnel."
Then, authorities will lower a doctor and a rescuer into the chamber, Health Minister Jaime Manalich said. Medical and rescue personnel will be in place to start extracting and treating the miners Monday night, he said.
Once the miners have been extracted, they will undergo about two hours of health checks at a field hospital set up at the mine.
Barring complications, it will take about 24 to 36 hours to remove all the miners through the 2,300-foot hole, Manalich said. They will then be flown by helicopter to a hospital in the town of Copiapo -- approximately a 15-minute flight.
coppied by http://edition.cnn.com/2010/WORLD/americas/10/08/chile.trapped.miners/index.html?hpt=T1
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