| Cause-wise Trend in Dangerous Occurrences in Coal Mines in India (1990 to 2006) | |||||||||||||||||
| Classification | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
| Overwinding of Cages, Skip or Bucket | |||||||||||||||||
| Spontaneous Heating of Coal in underground | |||||||||||||||||
| Spontaneous Heating of Coal on Surface | |||||||||||||||||
| Spontaneous Heating Belowground | |||||||||||||||||
| Spontaneous Heating of Coal in Opencast Working | |||||||||||||||||
| 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 Occurrence of Inflammable Gas | |||||||||||||||||
| Breakage, Fracture or Failure of Essential Parts of Machinery or Appratus Whereby Safety of Persons was Endangered | |||||||||||||||||
| Irruption of Water | |||||||||||||||||
| Subsidence | |||||||||||||||||
| Explosives | |||||||||||||||||
| Transportation Machinery, Wheeled Trackless | |||||||||||||||||
| Fall of Machinery from Heights in opencast Working | |||||||||||||||||
| Others | |||||||||||||||||
| Total | |||||||||||||||||
