Course Hero Logo

Dig Into Mining.pdf - Dig into Mining! Deborah Wasylik, Dr....

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 1 - 3 out of 6 pages.

Dig into Mining!Deborah Wasylik, Dr. Phillips H.S. Orlando, FLMining is a very diverse field with different aspects to it. There are many different ways thatminerals are extracted from the earth depending on where they are located. The main twodivisions of mining are:Surface miningUnderground miningSurface MiningSurface minesare mining operations that delve into rock to extract deposits of mineral resourcesthat are close to the surface. In most forms of surface mining, heavy equipment, such asearthmovers, first remove the overburden (the soil and rock above the deposit). Next, hugemachines such as drag line excavators extract the mineral.Once the material has been removed, the land is recovered for safe use on the surface through aprocess called reclamation.There are several variations of surface mining...Placer MiningPlacer mining defines any type of mining where the rawminerals or ore is located in either in sand, gravel, or on the surface soit is retrievable without the use of dynamite or other extraordinarymeans. Placer means“sandbank”in Spanish so the term is veryappropriate to the type of mining. There are different types of placer
mining which include sluicing, dredging, and panning. The simplest and one of the oldesttechniques of placer gold mining is panning. Panning is a method used by hobbyists andpersonal miners using a gold pan. In panning, some sediment is placed in a large metalpan, combined with a generous amount of water, and agitated so that the sand flows overthe side. Any gold particles contained in the sand, due to the higher density of gold, willtend to remain on the bottom of the pan after all of the sand and mud have been removed.In order to increase the yield, miners would often build sluice boxes. In sluicing theplacer gravel is shoveled into asluice box which sits on an incline.The sluice box has a mix of trapsand riffles that catch the material asit passes through. Water is fed intothe sluice and the riffles trap theheavy minerals. Sluicing allows thecapturing of very fine gold particlesas does panning, but processes moresand and sediment. Commercialwater based mining is calleddredging. (photos: scienceblogs.com; mygoldrush.com).

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 6 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
NoProfessor
Tags
underground mining, Surface mining

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture