UPDATE 3-Codelco restarts Chuquicamata mine after strike forces halt
* Protesters block Codelco mine access roads across Chile
* Codelco No. 2 mine temporarily halted Tuesday morning
* Salvador remains suspended (New throughout, adds more comments from companies)
By Fabian Cambero
SANTIAGO, July 28 (Reuters) - A week-long strike by Codelco contract workers in Chile briefly stopped work at its second-largest copper mine on Tuesday, as Codelco Chief Executive Officer Nelson Pizarro negotiated with companies that employ the striking workers.
State-run Codelco, the world's No. 1 copper miner, said it had halted operations at Chuquicamata on Tuesday morning, after protesters cut off mine access roads and threw stones at vehicles as shifts changed.
By afternoon, operations had "normalized", the company said in a statement.
Codelco is undertaking an ambitious investment plan to revamp its aging mines at a time when the copper price is at multi-year lows.
Century-old Chuquicamata's contribution has declined as its ore grades have diminished, but it still had output of 340,000 tonnes of copper in 2014, or about 2 percent of global output. Continuación...