Operations at NMDC Donimalai mine to improve domestic iron ore supply: Experts SECTIONS Last Updated: Feb 21, 2021, 04:55 PM IST Share Synopsis Resumption of mining operations at the Donimalai mine will improve iron ore supply in the country and help ease prices of the key steel making raw material, experts say. Agencies Resumption of mining operations at the Donimalai mine will improve iron ore supply in the country and help ease prices of the key steel making raw material, experts say. Mining at NMDC's 7-million tonnes per annum (MTPA) Donimalai mine in Karnataka resumed from Thursday. After remaining closed for over two years, the country's largest iron ore miner company was able to resume operations following the necessary permission and clearances from the Karnataka government.