Khost Colliery, Nadir Khan Mine

This was the first mine explosion in India on record. The explosion occurred in a thin and steep seam (only 75 cm thick, dip 53°) which depended only on natural ventilation. The coal had high volatile matter (45%) and gas had occasionally been found in the workings. Un-bonneted Clanny flame safety lamps were in use throughout the mine. Inquiry into the accident revealed that the explosion was caused by an ignition of firedamp by a damaged flame safety lamp and was propagated throughout the mine by the agency of coal dust.