1 / 52

Mineral Commodities

Mineral Commodities. Solid Earth System. Coal Mining Techniques.

ilithya
Télécharger la présentation

Mineral Commodities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mineral Commodities Solid Earth System

  2. Coal Mining Techniques

  3. Mine was using ‘retreat mining’ where pillars of coal, originally left to hold up the mine’s roof, are removed, in order to recover the coal in them. The pillars near the back of the mine are removed first, hence the word ‘retreat’. Ideally, the roof collapses in a sequence of small events. But if collapse is delayed, it can be very energetic and dangerous.

  4. Black Lung Disease

  5. Mountaintop removal coal mining

  6. Mine leachate near Ouray CO

  7. froth flotation tank

  8. pouring slag at night

More Related