coal mining definition

MJ Series Jaw Crusher

MJ Series Jaw Crusher

MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing in the crushing section. Because it can effectively…

MC Series Single-Cylinder Hydraulic Cone Crusher

MC Series Single-Cylinder Hydraulic Cone Crusher

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway, chemical and building materials industries. It…

ML Series Vertical Shaft Impact Crusher

ML Series Vertical Shaft Impact Crusher

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical shaft impact crushing equipment is very popular…

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine material crushing of some rocks and ores. MD series…

MF Series Fixed Shaft Circular Vibrating Screen

MF Series Fixed Shaft Circular Vibrating Screen

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box caused by diagonal vibration in the actual screening…

MGD Series Vibrating Feeder

MGD Series Vibrating Feeder

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact crushers and primary hammer crushers. It is widely…

Underground mining | Britannica

Coal is a combustible black or dark brown rock consisting of carbonized plant matter, found mainly in underground deposits and widely for electricity production. Coal. Definition. Coal is a black or dark brown combustible rock made primarily of carbon. It was formed millions of years ago when ferns, plants and trees died and fell into swamps.

Glossary of Mining Terms -

Then it was fully a mile from the opening of the coal-mine to the face of the coal, and all, of course, was in the blackest darkness. View in context. A big coal waggon, loaded with lump coal and drawn by four huge horses, just debouching from Kearny Street as though to turn down Market, blocked their way.

Coal mining | Britannica

Coal takes millions of years to form. Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests.

Glossary of Mining Terms -

Alternatively, the coal is drilled, and the resultant holes are loaded with explosives and blasted in order to break the coal to the desired size. In order to protect the miners and equipment in an underground coal mine, much attention is paid to maintaining and supporting a safe roof or overhead ceiling for the extraction openings.

Mining terms explained: A to Z | Anglo American

Bootleg Coal - The mining and/or selling of coal from an area not owned by the miner or without the owner's permission. Bord - A chamber excavated in coal, off a balance. In some coal fields, a bord is called a room. Bore Hole - A hole of small diameter drilled or bored to explore the strata beneath,

What does coal mining mean? - definitions

Feb 05, 2020· canary in a coal mine, what about a flea in a circus, a goldfish in a bowl, the blind pit pony, not forgetting the ones we eat. Don't feel to sorry for the canary although to be born into the tropics and end up in pit well wouldn't be long before you stopped singing anyway.

coal mining definition | English definition dictionary ...

Definition and synonyms of coal mining from the online English dictionary from Macmillan Education. This is the British English definition of coal mining. View American English definition of coal mining. Change your default dictionary to American English. View the pronunciation for coal mining.

Unit 4 APUSH Vocabulary Flashcards | Quizlet

Mining definition, the act, process, or industry of extracting ores, coal, etc., from mines. See more.

Coal mining | definition of Coal mining by Medical dictionary

And if so, this is the article for you. We're going to explain what surface mining is and give you some information about the MSHA Part 46 training requirements for surface mines to boot. If you read through this and are still wondering about the surface mining definition, leave a note in the comments below.

Coal - definition of coal by The Free Dictionary

coal mining definition: the business, job, or process of removing coal from the ground: . Learn more. Cambridge Dictionary Plus; My profile; How to... Log out; Dictionary ... Add coal mining to one of your lists below, or create a new one. More {{name}} Go to your word ...

Coal mine - definition of coal mine by The Free Dictionary

Coal definition: Coal is a hard black substance that is extracted from the ground and burned as fuel. | Meaning, pronunciation, translations and examples. Log In ... To return coal mining jobs to West ia would mean erecting massive barriers to imports. Times, Sunday Times (2016) Watch him talk about coal …

What Is Surface Mining? | Convergence Training

Mar 07, 2014· Aided by railroads, which tore through the countryside, coal companies soon found themselves reaching a level of power that had previously been thought unattainable. Owning countless square miles of land, coal companies created company towns, where miners and their families lived, worked and worshiped under the watchful eye of mine bosses.

What Is Mountaintop Removal Mining? | Earthjustice

In coal mining this is the intended basis for roof bolting. Bearing – A surveying term used to designate direction. The bearing of a line is the acute horizontal angle between the meridian and the line. The meridian is an established line of reference. Azimuths are angles measured clockwise from any meridian.

coal - Kids | Britannica Kids | Homework Help

The major source of fuel throughout the world is coal. Coal is a black or brown rock that, when burned, releases energy in the form of heat. One of coal's main uses is the production of electricity.

Mining | Definition of Mining at

Coal mining definition: the act, process, or industry of extracting coal from the earth | Meaning, pronunciation, translations and examples. Log In Dictionary. ... coal mine; coal miner; coal miner's lung; coal mining; coal oil; coal pit; coal pot; All ENGLISH words that begin with 'C' Source.

COAL MINE | definition in the Cambridge English Dictionary

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What does It Mean to be a "Canary in a Coal Mine"?

Define coal mine. coal mine synonyms, coal mine pronunciation, coal mine translation, English dictionary definition of coal mine. Noun 1. coal mine - a mine where coal is dug from the ground coalpit colliery, pit - a workplace consisting of a coal mine plus all the buildings and...

Glossary of coal mining terminology - Wikipedia

Coal mine definition, a mine or pit from which coal is obtained. See more.

Coal Mining and Processing - The National Academies Press

Oct 21, 2019· canary in a coal mine (plural canaries in a coal mine or canaries in coal mines) Something whose sensitivity to adverse conditions makes it a useful early indicator of such conditions; something which warns of the coming of greater danger or trouble by a …

Coal mining - Wikipedia

Opening up of commercial coal mining for private sector is the most ambitious coal sector reform since the nationalisation of this sector in 1973 Methodology gives highest priority to transparency, ease of doing business and ensuring that natural resources are used for national development To bring efficiency into the coal sector by moving from an era of monopoly to competition Higher ...

Canary in a coal mine - Idioms by The Free Dictionary

Jan 20, 2020· Underground mining is a technique used to access ores and valuable minerals in the ground by digging into the ground to extract them. This is in contrast with techniques like open pit mining, in which the surface layers of ground are scooped away to access deposits, or mountaintop removal, in which the top of a mountain is simply shaved off to access the ore inside.

Coal mining : definition of Coal mining and synonyms of ...

Strip mine - An open-pit mine, usually a coal mine, operated by removing overburden, excavating the coal seam, then returning the overburden. Sub-bituminous - A black coal, intermediate between lignite and bituminous. Sublevel - A level or working horizon in a mine between main working levels.

Glossary of Mining Terminology

Mountaintop removal coal mining, often described as "strip mining on steroids," is an extremely destructive form of mining that is devastating Appalachia. In the past few decades, over 2,000 miles of streams and headwaters that provide drinking water for millions of Americans have been permanently buried and destroyed.

What is Underground Mining? (with pictures)

Definition of coal mining in the dictionary. Meaning of coal mining. What does coal mining mean? Information and translations of coal mining in the most comprehensive dictionary definitions resource on the web.

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