used mining generally

Generally depreciation of tangible equipment used in

tangible equipment used in mining operations is based on the life of the mining equipment or the life of the wasting asset, whichever is shorter. If the life of the mining equipment is shorter, the straight line method of depreciation is used. If the life of the wasting asset is shorter, the output method is used. If the mining equipment is movable and can be used in future extractive project

Is it safe to buy a used graphics card that's been mining

Jul 20, 2017· In the past, that usually means the break-even time for new computer hardware used for mining will be around 9-12 months, instead of the 2-3 months

Data Mining Techniques | Top 7 Data Mining Techniques for

Mining Underground mining | Britannica

Mining Mining Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on the

Mining engineering Wikipedia

Jan 29, 2003· Mining in the engineering discipline is the extraction of minerals from underneath, above or on the ground. Mining engineering is associated with many other disciplines, such as mineral processing, exploration, excavation, geology, and metallurgy, geotechnical engineering and surveying.A mining engineer may manage any phase of mining operations,from exploration and discovery of the

Coal mining Choosing a mining method | Britannica

The open-pit method is generally practiced where thick coal seams are overlain by thick or thin overburden; it is also used for mining steeply pitching coal seams. In the beginning stages of mining, considerable volumes of overburden materials must be accumulated in large dump areas outside the mine. Auger mining

Mining Wikipedia

Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef or placer deposit.These deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.

Mining Techniques | Geology for Investors

Sep 03, 2020· Surface mining techniques are generally cheaper than subsurface mining techniques. The closer a deposit is to the surface the cheaper it will be to extract. The ideal situation is a deposit close enough to the surface to that it can be removed by the open-pit method.

What are Amines? (with pictures) wiseGEEK

Sep 03, 2020· Generally, an amine is a molecule that centers around a single atom of nitrogen. It is used in agricultural chemicals, mining chemicals, flotation agents, and in petroleum refining. I have read that ethylamine should not be combined with strong acids or chlorine. It is used in organic synthesis as a reactive molecule.

citi exam 4 Flashcards | Quizlet

Under HIPAA, "retrospective research" (a.k.a., data mining) on collections of PHI generally Is research, and so requires either an authorization or meeting one of the criteria for a waiver of authorization. HIPAA's protections for health information used for research purposes...

Placer mining | Britannica

Placer mining, ancient method of using water to excavate, transport, concentrate, and recover heavy minerals from alluvial or placer deposits. Examples of deposits mined by means of this technique are the gold-bearing sands and gravel that settle out from rapidly moving streams and rivers at points

What Is Data Mining?

Data mining, on the other hand, usually does not have a concept of dimensions and hierarchies. Data mining and OLAP can be integrated in a number of ways. For example, data mining can be used to select the dimensions for a cube, create new values for a dimension, or create new measures for a cube. OLAP can be used to analyze data mining results

What is mining? Mongabay

Mining is generally very destructive to the environment. It is one of the main causes of deforestation. In order to mine, trees and vegetation are cleared and burned. With the ground completely bare, large scale mining operations use huge bulldozers and excavators to extract the metals and minerals from the soil. In order to amalgamate (cluster

Cyanide Use in Gold Mining Earthworks

Cyanide's efficiency makes mining more wasteful. Because cyanide leaching is very efficient, it allows profitable mining of much lower ore grades. Mining lower grade ore requires the extraction and processing of much more ore to get the same amount of gold. Partially due to cyanide, modern mines are. much larger than before cyanide was used;

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

A rarely used process of mining material, In-Situ or solution mining is the process of pumping a solution into the ore body, which dissolves the ore and is then extracted by a second pump. This method is used most in mining uranium deposits, with the Beverey Uranium Mine in South Australia being the nations first operating In-Situ Uranium Mine.

ICMM & Where and how does mining take place?

Mining and metal production has evolved from being a tough and dirty activity to a high-technology operation, using computerised remote-control equipment and complex machinery. Unlike their predecessors, today’s workers are highly trained personnel performing skilled work according to the highest standards of safety and efficiency.

How to know if websites are using your CPU to mine CNET

Instead, it's likely mining a currency like Monero or Dash. And in order to lower the chances of being detected by both the user and ad blockers, it typically limits its impact on the CPU to under

Bitcoin Mining Definition

May 14, 2020· The result of “bitcoin mining” is twofold. First, when computers solve these complex math problems on the Bitcoin network, they produce new bitcoin, not unlike when a mining operation extracts

An analysis of illegal mining on the Offin shelterbelt

Jan 01, 2016· Illegal mining is a poverty driven activity that is practiced in most developing countries where there is a poorly educated population and few employment opportunities (Yaro, 2010, Bagyina, 2012). Globally, an estimated 20 million people engage in illegal mining with nearly one quarter of the world's gold output originating from it (Hilson, 2001).

6. Cable Types and Selection Criteria 6. CABLE Anixter

6.1.2 Mining Cable Mine power cables are generally designed to be used as flexible feeder cables for circuits between the main power source and mine load centers or as equipment trailing cables. Mine power feeder (MPF) cables typically have voltage ratings of 5, 8, 15 or 25 kV and are available with or without a ground check conductor. A ground

Mining Technology in the Nineteenth Century | ONE

Mining technology consists of the tools, methods, and knowledge used to locate, extract, and process mineral and metal deposits in the earth. The methods used to locate ore bodies range from on-the-ground reconnaissance by prospectors to remote sensing techniques such as satellite imagery.

Salt Mining | HowStuffWorks

In 2006, more than 200 million tons of salt were produced in the world. China is the largest producer, with 48 million tons, followed closely by the United States, with 46 million tons [source: Salt Institute].Salt is generally produced one of three ways: deep-shaft mining, solution mining or solar evaporation. Deep-shaft mining is much like mining for any other mineral.

What Is Subsurface Mining? Reference

Apr 16, 2020· Subsurface mines are generally less than 1,000 feet deep, but some reach as deep as 2,000 feet. The deepest resources often require the drilling of shaft mines. Shaft mines are vertical mines that require the use of elevators to get the product and the workers out of the mine. Drift mines enter the ground horizontal to the deposit.

Data Mining: Purpose, Characteristics, Benefits

Data mining technology is something that helps one person in their decision making and that decision making is a process wherein which all the factors of mining is involved precisely. And while the involvement of these mining systems, one can come across several disadvantages of data mining and they are as follows.

Mining Technology in the Nineteenth Century | ONE

Mining technology consists of the tools, methods, and knowledge used to locate, extract, and process mineral and metal deposits in the earth. The methods used to locate ore bodies range from on-the-ground reconnaissance by prospectors to remote sensing techniques such as satellite imagery.

Mining : What Is Gold Mining? How Is Gold Mined? | Geology

Historically, mercury has been widely used in placer gold mining to form mercury-gold amalgam with smaller gold particles, thereby increasing the rate of gold recovery. In the 1960s, large-scale mercury use stopped. In artisanal and small-scale gold mining (ASGM), however, mercury is still used, often clandestine, gold prospecting.

Bitcoin Mining Definition

May 14, 2020· The result of “bitcoin mining” is twofold. First, when computers solve these complex math problems on the Bitcoin network, they produce new bitcoin, not unlike when a mining operation extracts

How Can Blockchain Improve Sustainability in Mining

Apr 26, 2019· More generally, blockchain can be a pivotal tool in sustainable mining supply chains due to its ability to track the financial, environmental, social and regulatory criteria of a project from the moment an operation begins to when an end user has the product in hand.

How to know if websites are using your CPU to mine CNET

Instead, it's likely mining a currency like Monero or Dash. And in order to lower the chances of being detected by both the user and ad blockers, it typically limits its impact on the CPU to under

What Is Subsurface Mining? Reference

Apr 16, 2020· Subsurface mines are generally less than 1,000 feet deep, but some reach as deep as 2,000 feet. The deepest resources often require the drilling of shaft mines. Shaft mines are vertical mines that require the use of elevators to get the product and the workers out of the mine. Drift mines enter the ground horizontal to the deposit.

Salt Mining | HowStuffWorks

In 2006, more than 200 million tons of salt were produced in the world. China is the largest producer, with 48 million tons, followed closely by the United States, with 46 million tons [source: Salt Institute].Salt is generally produced one of three ways: deep-shaft mining, solution mining or solar evaporation. Deep-shaft mining is much like mining for any other mineral.

An analysis of illegal mining on the Offin shelterbelt

Jan 01, 2016· Illegal mining is a poverty driven activity that is practiced in most developing countries where there is a poorly educated population and few employment opportunities (Yaro, 2010, Bagyina, 2012). Globally, an estimated 20 million people engage in illegal mining with nearly one quarter of the world's gold output originating from it (Hilson, 2001).

Data Mining: Purpose, Characteristics, Benefits

Data mining technology is something that helps one person in their decision making and that decision making is a process wherein which all the factors of mining is involved precisely. And while the involvement of these mining systems, one can come across several disadvantages of data mining and they are as follows.

6. Cable Types and Selection Criteria 6. CABLE Anixter

6.1.2 Mining Cable Mine power cables are generally designed to be used as flexible feeder cables for circuits between the main power source and mine load centers or as equipment trailing cables. Mine power feeder (MPF) cables typically have voltage ratings of 5, 8, 15 or 25 kV and are available with or without a ground check conductor. A ground

Surface mining – strip, open pit, mountaintop removal

Surface mining is a form of mining in which the soil and the rock covering the mineral deposits are removed. It is the other way of underground mining, in which the overlying rock is left behind, and the required mineral deposits are removed through shafts or tunnels.. Surface mining is basically employed when deposits of commercially viable minerals or rock are found closer to the surface

ore | National Geographic Society

Ore is a deposit in Earth’s crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron.. Copper ore is mined for a variety of industrial uses. Copper, an excellent conductor of electricity, is used as electrical wire.Copper is also used in construction.

3 Technologies in Exploration, Mining, and Processing

This method is commonly used in places where the topography and the deposit are generally flat. Reclamation is generally concurrent with mining. Strip mining is commonly used for mining coal seams and phosphate beds.

What is the difference between data mining and statistics

Data mining is used to discover patterns and relationships in your data in order to help you make better business decisions. Data mining cannot be ignored the data are there, the methods are numerous.