Gebra open cast coal mining in Korba, Chhattisgarh. At present, it is India's largest coal mine with a total production capacity of 35 million ton per annum. Gevra mining block is having an area of about 19.03 sq.km, located in the central part of Korba field. These types of landscapes are very common view in this region made by the overburden of open cast coal mining.