What is Concentric Drilling System and Why Do We Use Them?

Material that lies above the resource to be mined

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Overburden at a coal mining site

In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body. Overburden is distinct from tailings, the material that remains after economically valuable components have been extracted from the generally finely milled ore. Overburden is removed during surface mining, but is typically not contaminated with toxic components. Overburden may also be used to restore an exhausted mining site during reclamation.[1]

Interburden is material that lies between two areas of economic interest, such as the material separating coal seams within strata.[2][3]

Analogous uses

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Overburden is also used for all soil and ancillary material above the bedrock horizon in a given area.

By analogy, overburden is also used to describe the soil and other material that lies above a specific geologic feature, such as a buried astrobleme, or above an unexcavated site of archeological interest.

In particle physics, the overburden of an underground laboratory may be important to shield the facility from cosmic radiation that can interfere with experiments.

In arboriculture, the word is also used for the soil over the top of the roots of a tree collected from the wild.

See also

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Notes

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1. ^Industrial minerals & rocks: commodities, markets, and uses (7th edition) Society for Mining, Metallurgy, and Exploration (U.S.), Littleton, Colorado, ISBN 0-87335-233-5

   Kogel, Jessica Elzea (editor) (2006)(7th edition) Society for Mining, Metallurgy, and Exploration (U.S.), Littleton, Colorado, page 379

2. ^Selective Interburden Handling Techniques National Technical Information Service, Springfield, Virginia, OCLC 42983831

   United States Bureau of Mines (1980)National Technical Information Service, Springfield, Virginia,

3. ^Coal Mine Ground Control (2nd edition), Wiley, New York, page 303, ISBN 0-471-82171-3

   Peng, Syd S. (1986)(2nd edition), Wiley, New York, page 303,

References

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• Bates, R.L., and Jackson, J.A., (1987) Glossary of geology American Geological Institute, Alexandria, Virginia.
• Haering, K. C.; Daniels W. L. and Roberts J. A. (1993) "Changes in mine soil properties resulting from overburden weathering" Journal of environmental quality 22(1): pp. 194–200.
• McFee, W.W.; Byrnes, W.R. and Stockton, J.G. (1981) "Characteristics of coal mine overburden important to plant growth" Journal of environmental quality 10(3): pp. 300–308.

The dictionary definition of overburden at Wiktionary

Concentric Casing System

Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.
Maxdrill’s concentric casing system is the perfect drilling tool to drill hole in the complex rock formation. Maxdrill offers a wide range of sizes of the concentric casing system from 114mm (4 1/2") to 1220mm (48") to suit your needs.

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Concentric Casing System

Application Range:
The concentric overburden drilling system is widely used to drill in rock formations where ovals and fractures are present.

Design Principles:
The stable and reliable working performance and less vibration of the drill rig.

Different Structures:
Concentric system with ring bits, wing and blocks.

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As a reliable drilling tools manufacturer with a focus on supplying “Energy-saving, Economical, Efficient” products all along, we gradually become one of the most credible Chinese manufacturers in rock drilling tools industry. Maxdrill is always committed to supplying low cost, high efficiency, energy saving and environment-friendly products for global customers. No matter what types of rocks — soft rock, loose-medium rock, hard rock and any other special formations, just tell us what you need and leave the rest to us, and our customer service is always there to help you meet your requirements.

Are you interested in learning more about Concentric Drilling System? Contact us today to secure an expert consultation!