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explain the the difference between an opencast mine and underground mining

16Feb 701
The Actual Difference Between Surface and Underground Mining

The Actual Difference Between Surface and Underground Mining. There are two ways to extract a mineral - by digging it up, or accessing it by tunnels. This pretty much sums up the comparison of surface vs. underground mining. But is it that simple? For a better understanding, ScienceStruck gives more differences between these two methods.

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4Feb 1466
10 difference between quarry and mine

Mar 07 2013what is the difference between an open pit mine a quarry and an Opencast mining shaft ing can any one give Aug 18 2008 and later by underground methods. Assessment Of Distribution And Composition Of Quarry Mine

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17Feb 658
What Is Open Cast Mining?

 · 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. According to the Berkeley Laboratory for ...

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2Feb 1017
Surface Mining Methods and Equipment

in surface and underground mines. However, the total number of injuries per one million employee-hours for underground US coal mines in the last decade is three to four times higher than for surface mines. The difference between the injury rates per one million tons of coal production further demonstrates this point – underground mining is less

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16Feb 1856
What Are The Differences Between Open Cast And Shaft Mining

difference between open pit quarry underground mine shafts. ... Difference between open cast mining shaft mining.If access exists at the bottom of the proposed shaft and ground conditions allow then raise boring may be used to excavate the shaft from the …

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3Feb 1691
Opencast Mining

Mining and opencast mining in particular affect all components of ecosystems (Bradshaw, 1997).During opencast mining, material overlying the mined minerals, called overburden, is excavated and deposited in a heap. This heap can be located either inside the mine …

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1Feb 869
Difference Between Open Cast Mining And Underground Mining

Differences between open pit and underground mining Main Difference. In surface mining, the ore is accessed directly from the Earth''s surface, and contact is maintained with the surface throughout the operation. Underground or subsurface mining is accomplished with the help of tunnels going into the Earth, and does not occur on the surface.

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15Feb 1190
Glossary of Mining Terms

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.

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6Feb 1029
Module 2 Overview | ABC 123: Testing Site / Course

explain the difference between an Act (law) and a Regulation; explain the purpose of the Code of Federal Regulations, and Title 30, Volume I, Chapter I of the Code of Federal Regulations; list and describe the five major categories of mining law that govern everything from access to minerals, how we mine, to how we leave the site when we have ...

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5Feb 967
What is the difference between strip mining and ...

 · Strip mining is done on the surface; underground mining is done below the surface. In strip mining, the ore is extracted from the surface in layers resulting in a deepening artificial valley. This is done when the ore is relatively near the surface. In underground mining, mine shafts are bored or dug from the surface to the underground layers where the ore is located, and ore extraction takes ...

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17Feb 1913
Digging deeper: Mining methods explained | Anglo American

The underground mining methods we use include room and pillar, narrow vein stoping and large-scale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them which are …

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12Feb 1726
Different Types of Explosives Used in Mining

 · Due to their extreme sensitivity to heat, friction, impact, static electricity. Mercury fulminate, lead azide or PETN (or penthrite, or more properly Penta Erythritol Tetra Nitrate) are good examples of primary explosives used in the mining industry. They …

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7Feb 847
The Mining Life: Open Pit vs. Underground

 · The differences between the many kinds of mines, especially open pit mines and underground mines, are many, and miners tend to prefer one over the other. Every mining site has its natural and man-made characteristics that make it unique.

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2Feb 1919
New to Mining? Here are the Most Common Types of Mining ...

 · In an opencast or strip mining operation, the run of mine (ROM) material is normally transported to the primary crusher by haul trucks, and in underground mining operations it is conveyed to the primary crusher. Crushing equipment is important to the mining process because it reduces the use of precious excavated resources and eliminates the ...

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25Feb 1912
Difference Between Open Pit Mine A Quarry And An ...

What Are The Differences Between Open Cast And. The Difference Between An Opencast Mine And Binq Mining. Feb 08 2013 difference between a open pit mine and an underground mine openpit mining opencast mining opencut mining strip mining people in few of the englishspeaking countries are not likely to make a difference among an open. More Details

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15Feb 749
Mining Terms

Examples for Underground Mining Important Terms of Underground Mining . Some. ... Open Cast Mining . Open Pit Mining . Strip Mining . Quarry Mining . Placer Mining . ... is the maximum vertical and lateral extent which may be excavated economically in an open pit mine.

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14Feb 934
Underground hard-rock mining

Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer minerals, such as salt ...

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16Feb 1171
What are the different types of mining and how do they differ?

 · Underground Mining. Underground or Sub-surface mining involves the digging of a network of shafts and tunnels into the earth to reach and extract the deposit of ore or mineral beneath the earth. In comparison to other methods, underground mines impact less on the environment and are much more harmful to those working within them.

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20Feb 1994
Difference Between Open Cast Mining And Underground Mining

 · Differences between open pit and underground mining Main Difference. In surface mining, the ore is accessed directly from the Earth''s surface, and contact is maintained with the surface throughout the operation. Underground or subsurface mining is accomplished with the help of tunnels going into the Earth, and does not occur on the surface.

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17Feb 887
The Differences Between Shaft Mining And Opencast Mining

No Opencast! (Do or Die) - eco-action org. Since early 1995 there has been an informal co-operation between the No Opencast ... Opencast mining (or strip mining as it is also known) is one of the most ... the deep shaft mines came the expansion of the opencast coal mining industry with its .... the site and seemed to have seen us but drove off in a different direction.

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17Feb 916
Coal mining

Underground mining. In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata.Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of service facilities for such essential activities ...

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11Feb 1350
How is Coal Mined

 · These are termed as opencast and underground mining depending upon the proximity of the coal seam form the surface of the earth. Opencast mining is resorted to when coal is found at relatively shallower depths while underground or deep mining becomes necessary when coal is found at depths of more than 200 meters from the surface of the earth.

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22Feb 1782
Open Cut and Underground Mining | iMINCO

Underground Mining is generally used for areas where the mineral seam is too far underground for open cut mining to be of use. A tunnel, called a decline, is created to allow workers and machinery to reach the location of the minerals. Stope mining is used for most hard rock mining of minerals such as copper, silver, lead and zinc.

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10Feb 1763
(PDF) COAL MINING METHODS

The various methods of mining a coal seam can be classified under two headings, surface. mining and underground mining. 2. 3. Methods of extraction. The most economical method of coal ex traction ...

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9Feb 1919
Underground versus Open Pit Mining

 · There are several different ways to mine underground. You can build spiral tunnels that circle the deposit, sink vertical shafts adjacent to the ore, or create adits, which are horizontal excavations into the side of a hill or mountain. Unlike open pit, underground mining requires that you take into account a wide variety of added requirements ...

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8Feb 578
Underground Mine Ventilation | Technical Aspects of Mining ...

Underground mines of all sizes require a formal, planned ventilation system to deliver fresh air to all working places. Mine ventilation is the process of supplying sufficient fresh air to the U/G workings to achieve these purposes, ensuring proper distribution & use of the air, and controlling the return to surface of contaminated air.

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26Feb 903
1.1 PHASES OF A MINING PROJECT

Although underground mining is a less environmentally-destructive means of gaining access to an ore deposit, it is often more costly and entails greater safety risks than strip mining, including open-pit mining. While most large-scale mining projects involve open-pit mining, many large underground mines are in operation around the world. 1.1.3 ...

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17Feb 1502
Ground support

The fatality rate in underground mines in the 1970''s was on average twice as high as today''s rate regardless of the increase in mine production and depth. Throughout the ages, the development of new ground support techniques and stricter legislation has allowed for safe mining …

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14Feb 564
Mining and Refining – Process

Before mining can commence the land needs to be cleared of timber and vegetation. Alongside this process may be the collection of seeds and/or saplings, for inclusion in a seedbank, which will form the basis of post-mining revegetation of the site. Next the top soil is removed and is usually also stored for replacement during rehabilitation.

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30Feb 1484
Basics of an open pit mine

Open pit mines can be used in coal mining, and they are used extensively in "hard rock" mining for ores such as metal ores, copper, gold, iron, aluminum, and many minerals. In a open pit coal mine, the pit bottom would be the bottom mined coal seam elevation, since it is usually feasible to extract multiple seams when surface mining coal.

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22Feb 1981
CHAPTER 11 Mining Technology

not later be retrieved. Underground mining methods usually leave a significant portion of the coal reserve in the ground, Some under-ground mines recover only30 to 50 percent of the minable resource, although, averaged over all underground mines in the United States, the recovery ratio is63 percent. Sur- face mines, on the other hand, typically re-

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30Feb 1229
mining

mining - mining - Prospecting and exploration: Various techniques are used in the search for a mineral deposit, an activity called prospecting. Once a discovery has been made, the property containing a deposit, called the prospect, is explored to determine some of the more important characteristics of the deposit. Among these are its size, shape, orientation in space, and location with respect ...

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23Feb 980
i) Mechanical excavation methods; such as Open-pit and ...

Difference between surface and subsurface mining. Pros and Cons ... classified as open pit, opencast, quarrying or underground. An open pit mine is the mine to exploit the deposits which are outcropping to the surface, or those which are confined to a shallow depth, and the waste ... Open Cast Mining/Strip Mining Introduction

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10Feb 689
Reading: Open-Pit Mining | Geology

Open-pit mining, or open-cast mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. This form of mining differs from extractive methods that require tunneling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful minerals or rocks are found near the surface; that is ...

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4Feb 1641
Topic 5: Mining Methods-Part I-Surface mining

 · Topic 5: Mining Methods-Part I-Surface mining 1. Topic 5: Mining Methods Part I-Surface mining Hassan Z. Harraz [email protected] 2010- 2011 Prof. Dr. H.Z. Harraz Presentation This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course …

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12Feb 569
What is the difference between openCast mining, surface ...

Opencast Mining or quarrying of minerals is easier than mining by underground methods. During Quarrying the alluvium and rocks below which the minerals lie,are removed and dumped,in the initial stages, in a place which is not required for quarryin...

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29Feb 1290
difference between open cast mining and underground mining ...

 · open cast mining When minerals and deposits are found close to the surface and spread across a large distance, the best way to mine is to use the open cut mining method. In this process, the area is cleared of all topsoil and vegetation, this material is stockpiled and used later when rehabilitating the area once mining is finished.

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30Feb 821
Opencut Mining or Underground Mining

 · Besides coal, underground can be used to mine gold or copper. In underground mining, there are two methods: bord-and-pillar and longwall. Bord-and-pillar. Bord-and-pillar is the oldest mining method. A grid of tunnels is created in the areas of mineral content. The process chips away at the panels into the coal seam.

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