Six coal mines of four States have been successfully auctioned during the 7th tranche of Coal block auctions. Among the mines auctioned, two coal mines are fully explored while four are partially explored. Coal Ministry said, the total geological reserve for these six coal mines is at over 2,105 million tonnes. It said, a total of 92 coal mines have been auctioned so far under commercial auctions. The Ministry said, Coal production from these mines will help to reduce the demand for imported thermal coal and decreasing reliance on public sector coal mining companies.