PSU miner Coal India (CIL) has now limited mining only to Over Burden Removal (OBR) with falling demand of coal. The mining behemoth is now keeping seams exposed removing the top soil so that coal can be extracted as soon as the demand picks up.
OBR is an integral part of coal mining and the first stage in the process. Through exposed seams it can be easily estimated how much of coal has actually been mined, a CIL official told FE.
