The mines will serve as captive source for the company’s upcoming 3,960MW coal-based Sasan Ultra Mega Power Project.

The company began production six months ahead of the original schedule and aims to achieve capacity of about 20 million tons per annum in four years.

Reliance Power chairman Anil Ambani commenting on the development said, "We are developing the coal blocks to exacting international standards of operations, safety and productivity with the finest team available not only in the country but also overseas."

Reliance Power chief executive officer J P Chalasani stressed on the company’s commitment to increasing domestic coal production and reduce imports to save foreign exchange.

"For the Sasan mines we have deployed the largest, state-of-the-heart mining equipment ever used in Indian mining history to produce coal," Chalasani added.

The project has being financed by global financing institutions including the US Export-Import Bank.