Drift mining Britannica

Other articles where Drift is discussed: mining: Horizontal openings: drifts: All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration. A drift running parallel to the

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Mining - Horizontal openings: drifts Britannica

Mining - Mining - Horizontal openings: drifts: All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration. A drift running parallel to the ore body and lying in the footwall is called a footwall drift, and drifts

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Footwall drift mining Britannica

2020-4-28  Other articles where Footwall drift is discussed: mining: Horizontal openings: drifts: the footwall is called a footwall drift, and drifts driven from the footwall across the ore body are called crosscuts. A ramp is also a type of drift.

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Mining - Underground mining Britannica

Mining - Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on the

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Coal mining - Choosing a mining method Britannica

2020-5-15  Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the cho of which method to use in extracting a coal seam depends on many

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Mining Britannica

Mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with a few exceptions, is an inorganic substance occurring in nature that has a definite chemical composition and distinctive physical properties or molecular structure. (One organic

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Crosscut mining Britannica

Other articles where Crosscut is discussed: mining: Horizontal openings: drifts: the ore body are called crosscuts. A ramp is also a type of drift.

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Coal mining Britannica

2020-5-16  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

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drift mining britannica - bsideprojects

coal mining: various coal mines Students Britannica Kids. A surface mine is developed where a coal seam lies near the surface of the ground. For underground mining in hilly terrain, a drift mine may be opened where the entry can be driven horizontally; a slope mine where the entry must be driven at an angle—upward or downward—to reach the coal.

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Drift mining - WikiMili, The Free Encyclopedia

2019-3-25  Drift mining is either the mining of an ore deposit by underground methods, or the ing of coal seams accessed by adits driven into the surface outcrop of the coal bed. [1] A drift mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam. [2] Random House dictionary says the origin of the term

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Drift mining - Infogalactic: the planetary knowledge core

2019-12-17  Drift mining is either the mining of an ore deposit by underground methods, or the ing of coal seams accessed by adits driven into the surface outcrop of the coal bed. A Drift Mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam. Random House dictionary says the origin of the term "drift

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drift mining britannica

Drift mining Britannica. In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for

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mining Longwall mining - Students Britannica Kids

mining - Longwall mining - In the longwall system the ore body is divided into rectangular panels or blocks. In each panel two or more parallel drifts (for ventilation and ore transport) are driven along the opposite long sides to provide access, and at the end of the panel a single crosscut drift is driven to connect the two sides. In the crosscut drift, which is the “longwall,” movable

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underground mining drift - ME Mining Machinery

Mining Horizontal openings: drifts Britannica. Mining Mining Horizontal openings: drifts: All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.

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drift mijnbouw - Drift mining - qwe.wiki

Drift is een algemene term mining, waardoor een bijna horizontale doorgang in een mijn, na het bed (kolen, bijvoorbeeld) of ader erts. Een drift kan al dan niet snijden het grondoppervlak. Een drift volgt de ader, te onderscheiden van een afkortzaag dat het snijdt, of een niveau of galerij, die ofwel te doen.

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drift mining encyclopedia - operaanconajesi

Drift mining - Encyclopedia Britannica. In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.

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mining - Students Britannica Kids Home Help

Encyclopædia Britannica, Inc. There is a wide range of principal methods that can be used to mine such deposits. Room-and-pillar underground mining methods for many metal and nonmetal deposits differ from those of coal and other softer mineral deposits; these differences are primarily ones of equipment used, method of breaking up the ore, and ways of removing the ore from the mine.

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mining drift underground

Mining Underground mining Britannica. Mining Mining Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered.

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Drift Mining Definition of Drift Mining by Merriam

Drift mining definition is - mining gold-bearing gravel deposits by shafts and drifts instead of by hydraulic methods.

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Drift Definition of Drift by Merriam-Webster

Drift definition is - the act of driving something along. How to use drift in a sentence. Synonym Discussion of drift.

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Drift Definition of Drift by Merriam-Webster

Drift definition is - the act of driving something along. How to use drift in a sentence. Synonym Discussion of drift.

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drift and fill mining method - imaigenostredame

Learn how underground mining s at HowStuffWorks X often called drift and fill [sources: Mining KnowHow] The least common method in hardrock mining, Inquire Now; Mining Hisagoves. May 16, 2017018332Cut and fill mining is an expensive but selective method, with low ore loss and dilution Drift and fill is similar to cut and fill, Inquire Now

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Ayle Colliery Subterranea Britannica

2020-4-16  Ayle Colliery. Cumbria. Reports; Images; Videos; Map; Written by Clive Seal on 01 September 1996. The present Ayle Colliery was opened 1932 ⁄ 3 by Mr Mrs White of White Lea’s Farm who formed the Ayle Colliery CO Ltd. Coal had previously been ed by the ‘old man’ and from time to time these ings were broken into.. The First drift was started from behind White Lea’s farm

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Ellington Colliery Subterranea Britannica

2020-4-16  Ellington retained its separate identity for materials and man-riding, and its own underground locomotive allocation with a narrow gauge loco kept for surface use in the stockyard. The mine was closed by British Coal in February 1994, but retained on care and maintenance until it was acquired by RJB Mining.

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Coal Mining Methods - EMFI

2011-7-28  Coal Mining Methods Underground Mining Longwall Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United States. Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of

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mining process drift - communales2018

Retreat mining is a process that recovers the supporting coal pillars, ing from the back of the mine towards the entrance, hence the word retreat.Room and pillar mining advances inward, away from the entrance of the mine. Other underground mining methods include Hard rock mining, bore hole mining, drift and fill mining, long hole slope mining,

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Google's free serv instantly translates words, phrases, and web pages between English and over 100 other languages.

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INTRODUCTION TO MINING - Ciência Viva

2012-3-20  INTRODUCTION TO MINING 1.1 MINING’S CONTRIBUTION TO CIVILIZATION Mining may well have been the second of humankind’s earliest endeavors— granted that agriculture was the first. The two industries ranked together as the primary

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Wikipedia - Wikipedia

2 天前  Wikipedia (/ ˌ w ɪ k ɪ ˈ p iː d i ə / wik-ih-PEE-dee-ə or / ˌ w ɪ k i ˈ p iː d i ə / wik-ee-PEE-dee-ə) (abbreviation: "WP") is a multilingual online encyclopedia created and maintained as an open coloration project by a community of volunteer editors, using a wiki-based editing system. It is the largest and most popular general reference on the World Wide Web, and is one

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Drift Mining Accessible - ME Mining Machinery

Drift mining Britannica. In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.

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INTRODUCTION TO MINING - Ciência Viva

2012-3-20  INTRODUCTION TO MINING 1.1 MINING’S CONTRIBUTION TO CIVILIZATION Mining may well have been the second of humankind’s earliest endeavors— granted that agriculture was the first. The two industries ranked together as the primary

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Wikipedia - Wikipedia

2 天前  Wikipedia (/ ˌ w ɪ k ɪ ˈ p iː d i ə / wik-ih-PEE-dee-ə or / ˌ w ɪ k i ˈ p iː d i ə / wik-ee-PEE-dee-ə) (abbreviation: "WP") is a multilingual online encyclopedia created and maintained as an open coloration project by a community of volunteer editors, using a wiki-based editing system. It is the largest and most popular general reference on the World Wide Web, and is one

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Drift Mining Accessible - ME Mining Machinery

Drift mining Britannica. In mining: Horizontal openings: drifts. All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.

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what is drift mining placer -

Drift Mining, Mining Process, Mining Techniques, Gold . Drift Mining. Drift mining is a process of accessing precious geological material, like coal, by cutting into the side of the earth, rather than tunneling directly downwards. Drift mines have flat entries into the coal seam from a hillside. Drift mines are different from slope mines, which

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Anthracite - Wikipedia

2020-5-8  Anthracite derives from the Greek anthrakítēs (ἀνθρακίτης), literally "coal-like". Other terms which refer to anthracite are black coal, hard coal, stone coal, dark coal, coal, blind coal (in Scotland), Kilkenny coal (in Ireland), crow coal or craw coal, and black diamond. "Blue Coal" is the term for a once-popular and trademarked brand of anthracite, mined by the Glen

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Lethbridge - Wikipedia

2020-5-10  Lethbridge is the commercial, financial, transportation and industrial centre of southern Alberta. The city's economy developed from drift mining for coal in the late 19th century and agriculture in the early 20th century. Half of the force is employed in the health, education, retail and hospitality sectors, and the top five employers are government-based.

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Encyclopaedia Britannica

Enjoy Britannica content, without the clutter of ads. A credit card is required to validate your free trial. You will not be charged during your free trial, and you can cancel at any time. If you decide not to cancel your membership, your serv will continue at $74.95 for your first year and renew after that year at

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TERTIARY meaning in the Cambridge English Dictionary

tertiary definition: 1. relating to a third level or stage 2. relating to education in colleges and universities: 3. A. Learn more.

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1911 Encyclopædia Britannica/Coal - Wikisource, the

2020-5-11  1911 Encyclopædia Britannica/Coal. tributary of the Rhine. In the other chief industrial region of Germany, in Saxony, Zwickau and Lugau, are important mining centres. In German Silesia there is a third rich field, which extends into Austria (Austrian Silesia and Galicia), for which country it forms the chief home source of supply (apart

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Data mining - Wikipedia

2 天前  Data mining is the process of discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database systems. Data mining is an interdisciplinary subfield of computer science and statistics with an overall goal to extract information (with intelligent methods) from a data set and transform the information into a comprehensible structure for

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