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2007-06-30 22:27:24 · 5 answers · asked by mehdi n 1 in Science & Mathematics Earth Sciences & Geology

5 answers

"Cut-and-cover" is a method of excavation whereby the construction takes place from the ground surface. Once the excavation reaches a certain depth, the open cut can be covered with a steel or concrete plate to enable traffic or
pedestrians to traverse the excavation while construction proceeds below. This technique is used for tunneling through consolidated and unconsolidated geologic materials. The antonym for "cut and Cover" would be "mined excavation".

2007-07-01 10:02:34 · answer #1 · answered by Metallic stuff 7 · 1 0

They strip off the overburden, mine out the mineral and then replace to dirt that they took of to get at the mineral. Then they plant a few trees, a bit of grass and say that everything is better than it was before they started.
Once they get the first cut complete they cover it with the soil from the next cut. Basically they are just piling the dirt onto where they dug up before.

2007-07-01 07:26:28 · answer #2 · answered by ? 5 · 0 1

Open-pit mining, or opencast mining, refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow.

The term is used to differentiate this form of mining from extractive methods that require tunneling into the earth. Open-pit mines are used when deposits of commercially useful minerals or rock are found near the surface; that is, where the overburden (surface material covering the valuable deposit) is relatively thin or the material of interest is structurally unsuitable for tunneling (as would be the case for sand, cinder, and gravel). For minerals that occur deep below the surface—where the overburden is thick or the mineral occurs as veins in hard rock— underground mining methods are used to extract the valued material.

Open-pit mines that produce building materials are commonly referred to as quarries. People in some English-speaking countries are unlikely to make a distinction between an open-pit mine and other types of open-cast mines, such as quarries, borrows, placers, and strip mines.

Open-pit mines are typically enlarged until either the mineral resource is exhausted, or an increasing ratio of overburden to ore makes further mining uneconomic. When this occurs, the exhausted mines are sometimes converted to landfills for disposal of solid wastes. However, some form of water control is usually required to keep the mine pit from becoming a lake.

2007-07-01 09:36:19 · answer #3 · answered by Michael N 6 · 0 0

http://www.answers.com/cut+mining?cat=technology cut mining = open pit mining

the only thing that I could find for cover mining however is toxic cover of mining. or cover up in the mining industry.

2007-07-01 05:40:29 · answer #4 · answered by Kristenite’s Back! 7 · 0 1

they dig out what need to use and when there finished they
cover it up with they dirt they dug up.

2007-07-03 00:08:49 · answer #5 · answered by atlantismeditation@sbcglobal.net 6 · 0 1

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