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SANTIAGO, Chile — Chile’s mining minister acknowledged that a problem has stalled the most advanced of three tunnels being drilled to 33 miners trapped underground and said officials might have to restart the bore hole in another location.
But Laurence Golborne insisted Sunday that the setback is within the range of problems foreseen by authorities.
A drill last week struck an iron support beam for a mine shaft, destroying a drill bit. A replacement part was rushed from the United States, but engineers have so far failed to recover all of the broken metal using magnets.
