Titulo
Mine engineers decided to encase just the top part of the shaft with steel tubing to prevent rockfalls and further collapse during theextraction process. Previously, they had thought they might need to encase the whole thing -- a process which would have delayed the rescue. Rescue crews have been drilling three separate wider holes tosend down the rescue capsule and hoist the men to the surface. Those rescue attempts have been labeled Plans A, B and C. Brandon Fisher, owner of the Pennsylvania Company that provided and oversawthe use of drilling bits for the Plan B team, felt a "huge sense of relief and joy" and noted that the success wasn't "in the bag until we were through."
"This project was unbelievably challenging,"said Fisher, whose company, Center Rock Inc., aided in the rescue of nine miners who were trapped for more than four days after the 2002 collapse of the Quecreek Mine, also in Pennsylvania.
After the2,300-foot hole in Chile is secure, materials and equipment will be brought in so that the rescue capsule -- dubbed the Phoenix -- can be lowered into the mine. Then, authorities will lower a doctor...
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