Tuesday, August 7, 2007

visuals of open pit mines/quarry

Dear students take a look at these visuals for better understanding of the concepts.First two pictures are of QUARRY and other two are of OPEN PIT MINES.



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^^VRINDA CHHABRA^^ said...

HIII MA'AM ..
I HAVE SEEN ALL THE PICTURES AND AND INFORMATION THAT YOU POSTED ON THE BLOG.THEY ARE REALLY NICE AND TO ADD TO THEM I WOULD ALSO LIKE TO CONTRIBUTE SOME MORE INFORMATION ABOUT MINING!!


MINING
Mining is the extraction of valuable minerals or other geological materials from the earth, usually (but not always) from an ore body, vein, or (coal) seam. Materials recovered by mining include bauxite, coal, copper, gold, silver, diamonds, iron, precious metals, lead, limestone, nickel, phosphate, oil shale, rock salt, tin, uranium, and molybdenum. Any material that cannot be grown from agricultural processes, or created artificially in a laboratory or factory, is usually mined. Mining in a wider sense can also include extraction of petroleum, natural gas, and even water.


Procedure
Steps of process
1.Prospecting to locate ore.
2.Exploration to find and then define the extent and value of ore where it is located ("ore body").
3.Conduct resource estimate to mathematically estimate the extent and grade of the deposit.
4.Conduct mine planning to evaluate the economically recoverable portion of the deposit (and including reclamation planning).
5.Conduct a feasibility study to evaluate the total project and make a decision as whether to develop or walk away from a proposed mine project. This includes a cradle to grave analysis of the possible mine, from the initial excavation all the way through to reclamation.
6.Development to create access to an ore body
7.Exploitation to extract ore on a large scale
8.Reclamation to make land where a mine had been suitable for future use.

Techniques

A minecart toilet, used in Bisbee, Arizona.Mining techniques can be divided into two basic excavation types:

1. Surface mining
Open-pit mining
Quarrying
Strip mining
Placer mining
Mountaintop removal
2. Sub-surface mining
Drift mining
Slope mining
Shaft mining
Hard rock mining
Borehole mining
Drift and Fill mining
Long Hole Stope mining
Sublevel Caving
Block Caving
Shrinkage Stope mining


Solution mining is a particular mining technique that is used to mine minerals (potash, potassium chloride, sodium chloride, sodium sulphate) which dissolve in water.

August 7, 2007 at 6:17 PM

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