Trend in Output of Coal as Obtained from Longwall Working and Splitting as Final Operation in India (1966, 1971, 1976 and 1981 to 2014) | ||||
Year | Longwall Working | Splitting as Final Operation | ||
No. of Mines Reported | Output (In ` 000 Tonne) | No. of Mines Reported | Output (In ` 000 Tonne) | |
N.A. | N.A. |