what is the meaning of coal mining

What Is Open Cast Mining? | Reference.com

Open cast mining is a type of surface mining in which mineral resources are removed from the earth through large holes or pits dug into the surface. The term "open cast mining" is used most commonly in Great Britain. In the United States, open cast mining is usually called open-pit or open-cut mining.

what is the meaning of coal mining

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What does coal mean? - Definitions.net

Chambers 20th Century Dictionary (0.00 / 0 votes) Rate this definition:. Coal. kōl, n. a solid, black, combustible substance used for fuel, dug out of the earth: cinder.—v.i. to take in coal.—v.t. to supply with coal.—n. Coal′-bed, a stratum of coal.—adj. Coal′-black, black as coal, very black.—ns. Coal′-box, a box for holding coal; Coal′-brass, a name applied to the pyrites ...

Coal - Idioms by The Free Dictionary

Like this video? Subscribe to our free daily email and get a new idiom video every day! canary in a coal mine Something or someone who, due to sensitivity to his, her, or its surroundings, acts as an indicator and early warning of possible adverse conditions or danger. Refers to the former practice of taking caged canaries into coal mines. The birds ...

Mining - definition of mining by The Free Dictionary

Particularly outstanding in the first group of coal papers are an overview on the effects of longwall mining on aquifers (Booth), and a case study on the assessment, prediction and management of long-term, post-closure water quality at a South African coal mine (Hattingh et al.

expressions - What is "a canary in a coal mine"? - English ...

A canary in a coal mine is an advanced warning of some danger. The metaphor originates from the times when miners used to carry caged canaries while at work; if there was any methane or carbon monoxide in the mine, the canary would die before the levels of the gas reached those hazardous to humans. See here.

coal mine (noun) definition and synonyms | Macmillan ...

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent. The thesaurus of synonyms and related words is fully ...

Glossary of Mining Terms - rocksandminerals.com

Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

Coal mining in India - Wikipedia

Coal mining in India began in 1774 when John Sumner and Suetonius Grant Heatly of the East India Company commenced commercial exploitation in the Raniganj Coalfield along the Western bank of Damodar river.Growth remained slow for nearly a century due to low demand. The introduction of steam locomotives in 1853 boosted demand, and coal production rose to an annual average of 1 million …

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

Mar 27, 2019· Today, the practice of using a to test the air supply has become part of coal mining lore, but the ideology behind it has become a popular expression. The phrase "living like a canary in a coal mine" often refers to serving as a warning to others. The actual canary had little control over its fate, but it continued to sing anyway.

Glossary of Mining Terms - Coal Education

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

To act like the canary in the coal mine - Idiom ...

Apr 22, 2017· "To act like the canary in the coal mine" is an idiomatic expression referring to the literal sense and situation of the canaries that were used in coald mines. As I understand, canaries were used, in the 19th C and early 20th C, in coal mines, not as pets or to keep company to the miners, but as zoological early-warning systems for toxic gases ...

Coal | Define Coal at Dictionary.com

Carbonaceous material accounts for more than 50 percent of coal's weight and more than 70 percent of its volume. Coal is widely used as a fuel, and its combustion products are used as raw material for a variety of products including cement, asphalt, wallboard and plastics. See more at anthracite bituminous coal …

Coal mining | Britannica.com

Coal mining: Coal mining, extraction of coal deposits from the surface of Earth and from underground. Coal is the most abundant fossil fuel on Earth. Its predominant use has always been for producing heat energy. It was the basic energy source that fueled the Industrial Revolution of the 18th and 19th

Coal | Definition of Coal by Merriam-Webster

— Jari Tanner, The Seattle Times, "Finns to vote on how best to save their welfare state," 12 Apr. 2019 Then, as a lobbyist, Wheeler represented the largest coal mining operation in the Untied States, Murray Energy, for more than a decade.

rom meaning in coal mining - krugerbrau.co.za

A coal preparation plant is a facility that washes coal of soil and rock, crushes it into graded ... The coal delivered from the mine that reports to the coal preparation plant is called runofmine, or ROM, coal.

what is a coal mines - vanoersgroup.eu

Coal mining in India - Wikipedia. Coal mining in India began in 1774 when John Sumner and Suetonius Grant Heatly of the East India Company commenced commercial exploitation in the Raniganj … Coal | Definition of Coal by Merriam-Webster. Coal definition is - a piece of glowing carbon or charred wood : ember. How to use coal in a sentence.

Coal mining - Wikipedia

Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

What does coal mining mean? - definitions.net

Freebase (0.00 / 0 votes) Rate this definition: Coal mining. The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.

canary in a coal mine - Wiktionary

Jan 11, 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 …

Glossary of Mining Terminology - Miners Museum

Inbye - A term relative to position, meaning nearer to the coal face, and opposite to the term outbye. Sometimes it is used on the surface to mean that an individual is in the mine. Induration - The process of hardening of sediments through cementation, pressure, heat, ... Glossary of Mining Terminology ...

Mining | Definition of Mining by Merriam-Webster

Mining definition is - the process or business of working mines. Recent Examples on the Web. One of Silicon Valley's most secretive companies, data-mining giant Palantir Technologies, is considering an initial public offering that some banks have valued at as much as $41 billion — one of the largest in recent years.— Recode Staff, Recode, "Recode Daily: Uber is building tools to Uber-ize ...

rom meaning in coal mining - krugerbrau.co.za

Prior to September 1999 the estimation and reporting of Coal Resources and Reserves in Australia ... Estimator) should have tertiary qualifications in geology or mining ... depth, quality, mineability or economic potential; and by definition, includes all Coal Resources. Coal In .... and presented as run of mine (ROM) coal. Read more

What does coal mining mean? - Definitions.net

Freebase (0.00 / 0 votes) Rate this definition: Coal mining. The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.