In 2016, Rampura Agucha is expected to be the world's largest zinc producer, and has held this position since 2008. The project was given the go-ahead by the Indian Government in 1985. Commercial production started in June 1991. Until recently, mine production has come solely from the Agucha open pit. The high average head grade of the ore milled helped make this the largest zinc mine in the world for a number of years, with contained metal production averaging 650kt/a zinc between 2009 and 2014. Ore from underground stopes began supplementing the open pit ore feed to the mill from 2013, with some development ore prior to this.
The deposit is mined using conventional open pit methods, with additional production from underground stopes being fed to the mill from 2013. The open pit was expected to close in around 2017/2018, however with the development of the underground mine behind schedule the open pit has had approval to extend the mine life to 2019. Closure of the open pit will be followed by the ramp-up of production from the underground mine.