mining stripping encyclopedia
Welcome to the broken dawn

mining stripping encyclopedia

Strip mining - Encyclopedia Britannica

Strip mining, removal of soil and rock (overburden) above a layer or seam (particularly coal), followed by the removal of the exposed mineral.. The common strip-mining techniques are classified as area mining or contour mining on the basis of the deposit geometry and type. The cycle of operations for both techniques consists of vegetation clearing, soil removal, drilling and blasting of ...

Strip Mining Encyclopedia

May 14, 2018  Strip mining is used for mining phosphate fertilizer in Florida, North Carolina, and Idaho, and for obtaining gypsum (mainly for wallboard) in western states. However, the most common association of strip mining is with coal . The examples of decimated land in Appalachia have motivated calls for prevention, or at least major efforts at reclamation.

Strip Mining - an overview ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004 2.3 Strip Mining. Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips. The pits are parallel and adjacent to each other. Strip mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling.

Break-even stripping ratio - Encyclopedia Britannica

mining. The break-even stripping ratio is a function of ore value and the costs involved. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made. Otherwise, if there are sufficient reserves under the knob of the hill, the coal may be recovered by underground mining or

Stripping ratio - Wikipedia

In surface mining, stripping ratio or strip ratio refers to the amount of waste (or overburden) that must be removed to release a given ore quantity. It is a number or ratio that express how much waste is mined per unit of ore. The units of a stripping ratio can vary between mine types. For example, in coal mining the stripping ratio is commonly referred to as volume/weight. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can be expressed as a ratio or as a number.

Mining - Encyclopedia Britannica

Large stripping machines with excavating wheels used in surface coal mining are employed in other types of open-pit mines. Water inflow was a very important problem in underground mining until James Watt invented the steam engine in the 18th century. After that, steam-driven pumps could be used to remove water from the deep mines of the day.

Open Pit Mining - an overview ScienceDirect Topics

There are two principle types of surface mining, strip mining and open-pit mining (see Fig. 8.8). Strip mining is the process of mining a seam of mineral by removing a long strip of overlying soil and rock. Strip mining is a practical type of mining when the ore body that is to be extracted is near the surface.

Coal Mining Encyclopedia

May 23, 2018  Mining Industry, Mining is a site-specific economic activity creating wealth from the extraction of nonrenewable resources from land and sea. The boundaries of the mi Strip Mining, This technique is used for near-surface, relatively flat sedimentary mineral deposits. How deeply the mining can occur is essentially determined by t

Mining Encyclopedia

Mining Modern mining is an industry that involves the exploration for and removal of minerals from the earth, economically and with minimum damage to the environment. Mining is important because minerals are major sources of energy [1] as well as materials such as fertilizers and steel.

Stripping ratio mining - Encyclopedia Britannica

Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of producing and

Mining - Surface mining - Encyclopedia Britannica

Mining - Mining - Surface mining: It has been estimated that more than two-thirds of the world’s yearly mineral production is extracted by surface mining. There are several types of surface mining, but the three most common are open-pit mining, strip mining, and quarrying. These differ from one another in the mine geometries created, the techniques used, and the minerals produced.

Strip mining Article about strip mining by The Free ...

strip mining: see coal miningcoal mining, physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Coal has been historically important industrially as a source of energy, but air pollution and climate change, which the ..... Click the link for more information ...

Surface Mining - e-WV The West Virginia Encyclopedia

Mar 11, 2020  Surface Mining. Surface mining allows the removal of coal from the surface rather than through underground tunnels. It requires the stripping away of earth, rock, and vegetation (collectively known as overburden) from above the coal deposit, which can then be mined and trucked away. Often referred to as strip mining, the practice has a history ...

Break-even stripping ratio - Encyclopedia Britannica

mining. The break-even stripping ratio is a function of ore value and the costs involved. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made. Otherwise, if there are sufficient reserves under the knob of the hill, the coal may be recovered by underground mining or

Mining - Encyclopedia Britannica

Large stripping machines with excavating wheels used in surface coal mining are employed in other types of open-pit mines. Water inflow was a very important problem in underground mining until James Watt invented the steam engine in the 18th century. After that, steam-driven pumps could be used to remove water from the deep mines of the day.

Surface Mining The Encyclopedia of Oklahoma History and ...

Significant strip-mining activity in the eastern Oklahoma coal field began about 1915. Large-scale surface mining commenced in the 1920s with the development of mechanized earth-moving equipment. By 1940 half of Oklahoma's annual coal production was recovered by surface mining, and at the end of the twentieth century 95 percent of the state's ...

Open Pit Mining - an overview ScienceDirect Topics

There are two principle types of surface mining, strip mining and open-pit mining (see Fig. 8.8). Strip mining is the process of mining a seam of mineral by removing a long strip of overlying soil and rock. Strip mining is a practical type of mining when the ore body that is to be extracted is near the surface.

Coal Mining Encyclopedia of Alabama

Strip mining, a variation of the open pit process used initially in the mid-nineteenth century, used bucket-wheel excavators to remove up to 200 cubic yards of dirt and rock in one bucketful. Mining engineer and English émigré Joseph Squire revolutionized coal-mining operations upon

MINING.COM - Answering Mining's Big Questions

Apr 29, 2021  Answering Mining's Big Questions. Economies reopening coupled with massive stimulus, faster-than-expected vaccine rollouts, and supportive fundamentals all

Mining The Canadian Encyclopedia

Apr 07, 2009  The Canadian Encyclopedia, s.v. "Mining", Last Edited March 04, 2015, ... through the development of large open-pit and strip-mining operations in British Columbia. Beginning in the 1960s, opencast mining permitted the massive expansion of Canadian mineral production from coast-to-coast.

Surface Mining Encyclopedia

Surface mining Surface mining techniques are used when a vein of coal or other substance lies so close to the surface that it can be mined with bulldozers, power shovels, and trucks instead of using deep shaft mines, explosive devices, or coal gasification techniques. Surface mining is especially useful when the rock contains so little of the ore being mined that conventional techniques, such ...

Coal The Encyclopedia of Oklahoma History and Culture

Underground or shaft mining predominated from the 1870s through the 1960s. Heavy production resulted from shaft mining in Coal, Pittsburg, Latimer, Haskell, and LeFlore counties. From 1974 through the twenty-first century surface or strip mining has prevailed, primarily in Rogers, Nowata, and

Strip-mining Article about strip-mining by The Free ...

Kentucky Diversified Fuels LLC is a consolidated energy company with operations in eastern Kentucky, consisting of a steam coal strip-mining company, Middle Fork Development Services LLC and subsidiaries; a development stage coal-to-liquid company, MXP LLC and a coal feedstock impoundment, situated on 24.68 acres, with around 2.4 million tons of in-place fine refuse reserves.

Strip-mining Article about strip-mining by The Free ...

Kentucky Diversified Fuels LLC is a consolidated energy company with operations in eastern Kentucky, consisting of a steam coal strip-mining company, Middle Fork Development Services LLC and subsidiaries; a development stage coal-to-liquid company, MXP LLC and a coal feedstock impoundment, situated on 24.68 acres, with around 2.4 million tons of in-place fine refuse reserves.

Surface Mining - e-WV The West Virginia Encyclopedia

Mar 11, 2020  Surface Mining. Surface mining allows the removal of coal from the surface rather than through underground tunnels. It requires the stripping away of earth, rock, and vegetation (collectively known as overburden) from above the coal deposit, which can then be mined and trucked away. Often referred to as strip mining, the practice has a history ...

Surface Mining The Encyclopedia of Oklahoma History and ...

Significant strip-mining activity in the eastern Oklahoma coal field began about 1915. Large-scale surface mining commenced in the 1920s with the development of mechanized earth-moving equipment. By 1940 half of Oklahoma's annual coal production was recovered by surface mining, and at the end of the twentieth century 95 percent of the state's ...

Open Pit Mining - an overview ScienceDirect Topics

There are two principle types of surface mining, strip mining and open-pit mining (see Fig. 8.8). Strip mining is the process of mining a seam of mineral by removing a long strip of overlying soil and rock. Strip mining is a practical type of mining when the ore body that is to be extracted is near the surface.

Strip-mines Article about strip-mines by The Free Dictionary

Find out information about strip-mines. An opencut mine in which the overburden is removed from a coal bed before the coal is taken out. McGraw-Hill Dictionary of Scientific Technical Terms, 6E,...

Coal Mining Encyclopedia of Alabama

Strip mining, a variation of the open pit process used initially in the mid-nineteenth century, used bucket-wheel excavators to remove up to 200 cubic yards of dirt and rock in one bucketful. Mining engineer and English émigré Joseph Squire revolutionized coal-mining operations upon

Coal The Encyclopedia of Oklahoma History and Culture

Underground or shaft mining predominated from the 1870s through the 1960s. Heavy production resulted from shaft mining in Coal, Pittsburg, Latimer, Haskell, and LeFlore counties. From 1974 through the twenty-first century surface or strip mining has prevailed, primarily in Rogers, Nowata, and

Coal National Geographic Society

Strip mining can be used in both flat and hilly landscapes. Strip mining in a mountainous area is called contour mining. Contour mining follows the ridges, or contours, around a hill. Surface Mining: Open-Pit Mining Open-pit mining is used when coal is located deeper underground. A pit, sometimes called a borrow, is dug in an area. This pit ...

MINING.COM - Answering Mining's Big Questions

Apr 29, 2021  Answering Mining's Big Questions. Economies reopening coupled with massive stimulus, faster-than-expected vaccine rollouts, and supportive fundamentals all

Stripping - definition of stripping by The Free Dictionary

strip 1 (strĭp) v. stripped, stripping, strips v.tr. 1. a. To remove clothing or covering from: stripped the beds. b. To remove or take off (clothing or covering): stripped off his shirt. c. To remove an exterior coating, as of paint or varnish, from: stripped the cabinets. d. To remove the leaves from the stalks of (tobacco, for example). e. To ...

Mining Tennessee Encyclopedia

Mining. Tennessee has a long, rich, and varied mining history. Although the industry today accounts for only about three-tenths of a percent of the state’s gross products and two-tenths of a percent of nonagricultural jobs, Tennessee remains among the national leaders in some mining categories. Nonetheless, minerals and mining in the late ...

Glossary of Mining Terms - Mineral

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.

Strip-mining - definition of strip-mining by The Free ...

Define strip-mining. strip-mining synonyms, strip-mining pronunciation, strip-mining translation, English dictionary definition of strip-mining. v. strip-mined , strip-mining , strip-mines v. tr. 1.

Coal Mining - Encyclopedia of Arkansas

Coal Mining. Coal fields in Arkansas are located in the Arkansas River Valley between the western border of the state and Russellville (Pope County) an area only about thirty-three miles wide and sixty miles long. Until about 1880, most coal mined in Arkansas was used near its original location, often to fuel the fires of blacksmiths.

Copyright © 2021.Company name All rights reserved.Dawn Broken