| Cause-wise Trend in Dangerous Occurrences in Coal Mines in India (2007 to 2015) | |||||||||
| Classification | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| Overwinding of Cages, Skip or Bucket | |||||||||
| Spontaneous Heating of Coal in Underground | |||||||||
| Spontaneous Heating of Coal on Surface | |||||||||
| Spontaneous Heating of Coal in Opencast | |||||||||
| Outbreak of Fire Underground from Spontaneous Heating | |||||||||
| Outbreak of Fire Underground from Causes Other Than Spontaneous Heating | |||||||||
| Outbreak of Fire in Quarry from Causes Other Than Spontaneous Heating | |||||||||
| Outbreak of Fire on Surface from Causes Other Than Spontaneous Heating | |||||||||
| Premature Collapse of Workings or Failure of Pillars/Benches/Major Roof Fall | |||||||||
| Influx of Noxious Gases | |||||||||
| Breakege of Winding Rope | |||||||||
| Breakdown of Winding Engine, Crank Shaft, Bearing Etc. | |||||||||
| Ignition or Occurence of Inflammable Gas | |||||||||
| Breakage, Fracture or Failure of Essential Parts of Machinery or Apparatus Whereby Safety of Persons was Endangered | |||||||||
| Irruption of Water | |||||||||
| Subsidence | |||||||||
| Explosives | |||||||||
| Others | |||||||||
| Spontaneous Heating Belowground | |||||||||
| Over Winding of Cages etc. | |||||||||
| Total | |||||||||
