difference between underground and open pit mining

There is nothing called Shaft mining Shaft sinking is the term for accessing mineral deposits present deep inside the earth In this process a shaft is being driven in the middle or side of the ore in underground mining where the access is thro Water inrush characteristics and hazard effects during the transition from open-pit to underground mining: a case study Abstract In this paper a comprehensive method that incorporates hydrochemical analysis and numerical simulation is proposed to analyse the characteristics of water inrush during the transition from open-pit to underground mining


Open-pit mining causes changes to vegetation soil and bedrock which ultimately contributes to changes in surface hydrology groundwater levels and flow paths Additionally open-pit produces harmful pollutants depending on the type of mineral being mined and the type of mining process being used

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

The Difference Between Underground Mining And Surface Mining 1 The Difference Between Underground Mining And Surface Mining The process of removal of essential mineral ores or geological substances from soil or sand is called mining These minerals are of great value and are abundantly available in rocks and earth's surface Minerals can be

During the nineteenth century precious metals deeper than about three hundred feet called for underground drift or hardrock mining Occasionally ore bodies sufficiently close to the surface made open pit or open cast mining practical Often regarded as a twentieth-century approach open pit mining was actually widespread earlier

Open-cut mining Opencut mining gets its name because that's exactly what this type of mining looks like a big open pit This type of mining allows for the extraction of minerals that aren't very far under the surface The process keeps the activity from going deep underground This has many advantages Yet it's only viable when the

What's The Difference Between Open Pit Mining

10 12 2012Open pit mining is just digging a large area like a quarry coal taken out from the pit Underground mining is where they sink shafts into the ground tunnels run off from that point Strip mining is a form of surface mining The ore is close to the surface of the land but has one or more layers of rock and dirt on top of it To mine the ore

Strip mining and subsurface mining Strip mining (or surface mining) is performed when surface soil and rock are stripped off to reach the mineral of concern When such operations are done surface water bodies (lakes streams etc) gets acidity Acid mine drainage occurs when water molecules infiltrates the spoil banks The water reacts with sulfide minerals to produce sulfuric

Open pit mining is usually done for those minerals which are lying close to the earth's surface Quarries are mines that are used to mine a deposit that lies at the earth's surface less difficulty or overburden Minerals like limestone gypsum are extracted like this Underground mines are used when minerals are deep beneath the earth's surface a vertical opening in an underground

The study looked at 342 open pit and 197 underground mines located in the Americas and Australia Long found that there was a significant difference between the production rate of underground vs open pit and block caving The equation found for underground deposits was found to be: The equation for open pit and block caving deposits was found

Open-pit Mining Operations Open-pit mines are dug on benches that are between four and sixty-meters in size depending on the size of machinery used to excavate The walls of most open-pit mines are dug at an angle and include steps to prevent avalanches from occurring inside the build site The incline section of the wall is called the

As nouns the difference between mining and mine is that mining is (senseid)the activity of removing solid valuables from the earth while mine is an excavation from which ore or solid minerals are taken especially one consisting of underground tunnels As verbs the difference between mining and mine

What is the difference between open-pit mining and underground Underground mining operations attempt to follow the course of a valuable ore deposit as it winds its way in three dimensions underground Get Price Report PDF - USGS Publications Warehouse Figure 3 Large electrically-driven ball mills used for grinding ore to a size suitable

03 12 2009Underground mining is exactly that - underground using tunnels and/or shafts High value minerals like gold copper uranium and diamonds are mined in underground mines If you are in an underground mine you can't see the sky In general underground mines have a much lower environmental impact than strip mines or other open pit mines

Coal mining

Coal mining - 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

and/or schedule Underground mines normally have less latitude for schedule changes than open pits Strategic and tactical mine planning components by R M Kear* Synopsis Strategic and tactical planning are both required in the mining industry but have completely different objectives and require different environments If these are not fully

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol II - Surface Mining Methods and Equipment - J Yamatomi and S Okubo Encyclopedia of Life Support Systems (EOLSS) Figure 2 Change in production and productivity of US coal mines The higher productivity for open pit mining equipment also lowers costs

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 Efficient mining companies design their mine to fit the natural formations they are trying to reach and the

Open-pit Mining Open-pit mining also known as opencast mining open-cut 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 extractive methods that need tunneling into the earth Open-pit mines are used

02 04 2007Open pit covers a large area visible above ground and is mined through roads that wind around the outside of the opening and are mined by heavy equipment Under ground mining is done through shafts and tunnels and is much more dangerous to personal safety

significantly changed since the photo was taken open pit mining continued in the Area 2 pit until completion in January 2014 mining commenced in the Area 118 pit in January and is expected to continue to July 2014 at a reduced rate Waste rock from mining operations is being deposited in several locations including the Southwest

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