| Number of Cases by Nature of Defect in Terms of Improvement Notices under Sections 22 (1) and 22A (1) of Mines Act, 1952 in Coal Mines in India (2010) | |
| Defect | Number of Cases |
| High Benches in Opencast Workings | |
| Inadequate Support | |
| Poor Ventilation | |
| Inadequate Coal Dust Suppression | |
| Isolation Stopping | |
| Improper/Non-Provision of Travelling Road | |
| Danger of Inundation | |
| Unstable Workings | |
| Lag in Stowing | |
| Accumulation of Gases | |
| Defective Electrical Installation | |
| Inadequate Earth Leakage Protection | |
| Defective Winding Rope | |
| Other Defects in Winding Installation | |
| Defective Shot-Firing Practices | |
| Others | |
| Total | |
