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Get PriceOpen pit mining or strip mining is an extraction process for ore or fossil fuels that takes place at the surface of a mining site Worldwide 40 percent of mining occurs at the surface according to Greenpeace International Compared with underground mining surface mining is much more efficient
Read MoreOpenpit mining also known as opencast mining opencut mining and strip mining means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow The word is used to distinguish this type of mining from
Read MoreThere are two principle types of surface mining strip mining and openpit mining see Fig 88 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 Openpit mining is the process of extracting rock or minerals from the earth through their removal
Read MoreOct 27 2019 Usually the open pitmining system is one that is based on simplicity due to the fact that it merely requires the shifting of whatever material is covering the deposit This process may be expedited if the top material is made up of easily maneuverable material such as coarse sand as opposed to rocks that may require more specialized equipment to break down and move them from
Read MoreStrip Mining Strip mining is a kind of surface mining The ore is very near to the surface of the land but has one or more layers of rock and filth on top of it To mine the ore these layers have to be removed The steps in strip mining are similar to openpit mining
Read MoreMar 02 2016 Openpit mining which is sometimes referred to as open cut mining opencast mining or simply strip mining is a mining technique that extracts important minerals from a borrow or an open pit There are two types of mining methods commonly used in large scale mineral mining open pit mining and tunneling Open pit mining is used when the minerals to be mined are located just close
Read MoreSURFACE MINING STRIP MINING Although sometimes mistakenly referred to as strip mining oil sands is actually mined from an openpit below several meters of mining is the mining of a relatively flat deposit very close to the surface commonly used in coal or phosphate industries
Read MoreStrip mining removal of soil and rock overburden above a layer or seam particularly coal followed by the removal of the exposed mineral The common stripmining techniques are classified as area mining or contour mining on the basis of the deposit geometry and type The cycle of operations for
Read MoreOpenpit mining refers to a method of extracting rock or minerals from the earth through their removal from an open pit or borrow Although openpit mining is sometimes mistakenly referred to as strip mining the two methods are different see above
Read MoreDec 05 2019 Usually the open pitmining system is one that is based on simplicity due to the fact that it merely requires the shifting of whatever material is covering the deposit This process may be expedited if the top material is made up of easily maneuverable material such as coarse sand as opposed to rocks that may require more specialized equipment to break down and move them from the site
Read MoreOpenpit mining often but not always results in a large hole or pit being formed in the process of extracting a mineral It can also result in a portion of a hilltop being removed In strip mining a long narrow strip of mineral is uncovered by a dragline large shovel or similar type of excavator
Read MoreAlthough openpit mines and underground mines are the two most common mining strategies placer mining and solution mining also have been used for mineral extraction Placer mining involves excavation of river or stream sediments and the separation of valuable minerals by gravity selective flotation or by chemical extraction
Read MoreA strip ratio or stripping ratio is an important measurement related to the openpit mining process It represents the amount of waste material also known as overburden that must be moved in
Read MoreOpen pit mining is the process of extracting ore rocks or any valuable Most open pits are designed in a step like structure with each step Any mining design should anticipate environmental or public relations issues involved with the site What Are the Hazards Associated with Open Pit Mining
Read MoreStrip mining is the process of removing a thin strip of overburden above the deposit and then dumping the waste behind it continuing along the length of the deposit Once the resource under this strip has been exploited another parallel strip is started with the waste dumped on top of the first strip
Read MoreOpenpit mining is an extremely effective surface mining technique for extracting minerals coal and other useful materials that are covered by relatively thin overburden layers However it takes the right equipment to penetrate the surface rock and reach the underlying layer in a timely and efficient manner
Read MoreOpen 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
Read MoreEnvironmental hazards are present during every step of the openpit mining process Hardrock mining exposes rock that has lain unexposed for geological eras When crushed these rocks expose radioactive elements asbestoslike minerals and metallic dust
Read MoreUnderground mining can cause natural gas explosions and pollutions open pit mining ruins the landscape and creates dangerous quarries that end up being garbage pits further polluting the area Strip mining similar to pit extract minerals then coal from surface deposits resulting in
Read MoreOpenpit mining methods are applicable to mining ore deposits that apex at or near the surface If the deposit apexes below the surface the overburden and barren capping overlying the ore must be removed in advance of openpit mining The removal of this material is known as stripping
Read MoreJun 13 2019 Strip mining is basically digging a ditch or trench from point A to point B You pile the soil on one side of the ditch and whatever does not have what you are looking for spoil on the other side When the coal or ore has been removed you fill the trench with the spoil and cover it with the soil Open pit mining is just a hole in the ground
Read Moreopenpit mining Removing minerals such as gravel sand and metal ores by digging them out of the earths surface and leaving an open pit Compare area strip mining contour strip mining dredging mountaintop removal subsurface mining
Read MoreOpen pit mining is the process of mining a near surface deposit by means of a surface pit excavated using one or more horizontal benches The term open pit Read more
Read MoreOpenpit mining often involves the removal of natively vegetated areas and is therefore among the most environmentally destructive types of mining especially within tropical forests Overburden also called waste or spoi l is the material that lies above an area with economic or scientific interest
Read More1131 Openpit mining Openpit mining is a type of strip mining in which the ore deposit extends very deep in the ground necessitating the removal of layer upon layer of overburden and ore In many cases logging of trees and clearcutting or burning of vegetation above the ore deposit may precede removal of the overburden The
Read Morestrip mining is done for 60 m while open pit is done for60 to near about 120 m Strip mining is done maintaining spoil piles system while open pit has a specific mining
Read MoreWhen speaking of an open pit mine the term strip ra tio is used The ratio of waste and or e for the design will give the aver age strip ratio f or that pit Figure 28 Openpit mining sequence
Read MoreDec 16 2019 Classically strip mining is used to mine tar sand and coal This technique is also referred to as open cast open cut or stripping In this technique the first step is the removal of trees shrubs and structures on the area to be mined a process which is usually accomplished with heavy duty bulldozers
Read MoreOPTIMIZATION OF AN OPENPIT GOLD MINE OPERATION IN PERU BASED ON THE ITERATIVE The Coriorcco Gold Project refers to an openpit mining operation at prefeasibility stage process 21000000 tons of mineralized optimum economic material with an average strip ratio of 1039 1
Read MoreTypical open pit mining method with thick coal seam Large machines remove the overburden in successive layers until the coal seam is reached The operator then extracts the coal and transports it
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