Codelco copper output hit by lingering effects of rock collapse

Codelco attributed a sharp drop in production at its top mine to the lingering effects of a rock collapse last year as the world’s No. 1 copper supplier strives to reverse slumping output. “This situation was foreseen in annual planning and does not affect the committed production budget,” the state-owned company said in a written response to questions about the massive El Teniente mine.