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.
Get PriceThe rocks brought up by the drilling rig are then logged and used to determine its economic potential. Why are most of the copper mines in Arizona open pit mines? The copper ore is usually in such small concentrations that a very large amount of rock must removed to make the process economical.
Get Price7) Drilling plans DRAGLINE OPERATION PLANNING Opencast mines using draglines for over burden removal involve the excavation of a series of parallel strips and each strip or cut is worked in a series of blocks. Normally digging a wedge shaped key cut with the dragline standing in line with the new high wall starts excavation of each block
Get PriceThe Glossary of Mining Terminology is a living document that will continue to be improved as the industry develops and Inuktitut speakers become more accustomed to the language used by the industry. The Glossary of Mining Terminology is a first attempt to improve Inuktitut terminology in the resource development field.
Get PriceMar 08, 2018· Openpit Mining Openpit mining is a method in which an ore is removed by digging a pit in the ground, and is used to remove copper, gold, iron, as well as nonmetallic minerals. It is normally used when the rock layer above the ore is too weak to allow underground tunnels.
Get PriceUnderground Mining. 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. Stopes are large openings or rooms .
Get Priceunderground method. For any such block, the value used for pit optimisation must be the difference between its open pit value and its underground value. The assumption underpinning this is that for a block that can be mined by either method, if it is not mined by open pit method, it will be mined by underground method.
Get PriceAt the mill: Applying metallurgical science to improve recoveries. With the right equipment and mining practices, a mine engineering team can significantly reduce dilution and effectively control and improve mill feed grades. This is the best route to ensuring high recoveries and in turn economic production.
Get PriceNov 23, 2013· Open Pit Groundwater Control A range of groundwater control techniques can be used, depending on the geology and the type of mine: • Inpit pumping – used to pump from sump areas within the pit • Perimeter dewatering wells – used to intercept lateral groundwater flow into the pit and to lower groundwater levels in advance of mining ...
Get PriceDesigning and advanced RC drilling grid for shortterm planning in open pit mines stockpile, or to the waste dump. Furthermore, a systematic bias may have large economic impacts on a project and due to the nature of blasthole drilling and sampling, bias can .
Get PriceMar 13, 2018· Because an open pit mine is open to the air larger machinery can be used to operate the mine. This is a real advantage to mining companies who often use large trucks to carry debris away from the mine. According to Caterpillar Corporation the model 777 off road truck commonly use in open pit mines can carry a payload of 200,000 pounds.
Get Priceequipment, which may include a mining loader, shovel or excavator. Loaders lift the ore or waste material onto the trucks for removal from the mine. In an openpit mine, loader types can include electric rope, hydraulic excavators including backhoe excavators, and frontend loaders (also called wheel loaders) (Er˘celebi and K rmanl, 2000).
Get PriceNov 29, 2010· open pit mine blasting Porti Nitti. Loading... Unsubscribe from Porti Nitti? ... Action Drill Blast Contractors Australia Duration: 2:50. Action Drill Blast 78,349 views.
Get PriceOct 16, 2019· The 2019 drill program was primarily designed to expand nearsurface mineralization down dip in the J Zone to support an openpit mine development scenario, while improving the .
Get Priceuse of heavy machinery, usually bulldozers and dump trucks, is the most common means of removing overburden. Openpit mining often involves the removal of natively vegetated areas, and is therefore among the most environmentallydestructive types of mining, especially within tropical forests. Because openpit mining is employed for ore
Get PriceWhen 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.
Get PriceAfter underground operations began, the project had a mine life estimate of 27 years, based on a drilling exploration program to a depth of 1,220 m (4,000 ft). Production ceased in 2001, and the Mir mine closed in 2004. The mine was recommissioned in 2009, and is expected to remain operational for 50 more years.
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