CNMC began construction on the Chambishi Copper Smelter (CCS) soon thereafter, and the plant opened in early 2009. In January of that year, the investor at Luanshya Copper Mine closed its operations and announced the mine was for sale; CNMC purchased it several months later. The mine reopened in December 2009 after hundreds of millions of dollars in investment; more than 2,000 miners are employed at China Luanshya Mine (CLM).
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The manner in which rock is blasted in mining operations subjects the rock mass to stress resulting in breakage. Different blasting methods result in different stress distributions in the rock and may have a significant effect on subsequent comminution operations (Chi et al., 1996). The effects of blasting on crushing and grinding are poorly understood. Comminution may take advantage of internal cracking and weakness in the rock caused by an explosive shock from blasting. However, quantifying this phenomenon will require a multidisciplinary investigation involving the physics of rock breakage, mining and mineral processing, and the optimization of energy requirements between blasting and crushing for size reduction