Jan 02, 2015 · HasdeoArand coalfield, spread over an area of 1,878 sq kms over Korba, Surguja and Surajpur districts in north Chhattisgarh, is loed about 300 kms away from the state capital. Of the total area, 1,502 sq km area is under biodiversityrich forest cover. The coalfield has total estimated reserves of billion tonne.