31. In 1985 open-pit mining operations were halted by Kennecott's Utah Copper. 32. It services a mining town ( the open pit mine is in this town ). 33. Open Pit mining at Nchanga started in 1955, in the main Nchanga Open Pit. 34. Newmont plans to return to open pit mining in 2010 if drilling results are positive. 35. Underground mining ended around 1949 . Future production would come from open-pit mining . 36. The near surface resource is believed to be recoverable through conventional open-pit mining . 37. Yanacocha operates three open-pit mines , with a fourth to open late this year. 38. The strike began Wednesday in the Kolubara open pit mine and spread Thursday to nearby Kostolac. 39. It includes an open-pit mine , a concentrator and two SX-EW plants. 40. Atlas Copco said the deal will help it expand in the open-pit mining market.
