1. Coal is a bedded deposit.
2. Metalliferrous minerals are non-bedded type .
3. Non-bedded deposits normally have a large horizontal extent, and more uniform in thickness, quality and dip.
4. They are often only mildly inclined.Very steep or nearly vertical bedded deposits are not common.
5. Mineral ore bodies are, as a rule, irregular in extent , thickness, quality and dip.
5. In many cases in exist in patches or shoots.
6. Hence metal mining methods are more varied and may have to be changed in the same mine in time to time.
7. Coal is softed than most of the metal ferrous minerals and coal drills are therfore electrically operated.
8. In pact electricity is the power in coal mines where as compressed air is the main power in under ground metal mines.
9. Extraction of coal is comparatively easy.
10. Roof of coal is comparatively soft and crumbly.
11. Coal can be used directly after extraction from the mines as a fuel.
12. Practically all the metal minerals need to be processed for getting the mineral and the metal.
13. Infrastructure in a metal mine is therefore heavy and costly
14. Underground mining of coal is much simpler.
15. In metalliferous mining, horizon mining is the standard practice requiring drivage of roads.
16. Underground coal mines produce an inflammable and explosive gas, fire damp, Such danger does not exits in underground metal mines
17. Naked lights cannot be used in coal mines.
18. Permitted explosives ,flame proof machinery is used in coal mines
19. Sampling and assaying is very important in metal mines but Coal mines does not call for a regular team of workers for sampling and quality control.
20. Geologists are required for metal mines.
21. Metal mines requires a high standard of surveying
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