the basic economics of open pit mining

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Mining for Bitumen

OIL SANDS MINING PIT Typically a truck-and-shovel operation oil sands is excavated from the mine pit using hydraulic or electric shovels A typical shovel load of is about 90 tonnes Mined oil sands normally contains from 7 to 13% bitumen by weight The oil sands is trucked to the Ore Preparation Plant using large heavy haulers

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1 1 PHASES OF A MINING PROJECT

1 1 3 1 Open-pit mining Open-pit 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 clear-cutting or burning of vegetation above the ore deposit

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Optimized design of drilling and blasting operations in

In this paper a hypothetical open pit copper mine is considered which needs to produce 30 million tonnes of waste and 25 million tonnes of ore based on its annual planning This mine works 340 days a year on which the drilling and blasting operations can be carried out Thus the time scale of the dynamic model is set as these operational days

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ECONOMIC ASSESSMENT AND MINE PRODUCTION

the project economics when certain variables of high importance such as the processing capacity gold price and dilution rate vary Open-pit mining operations are long-term investments and therefore are subject to possible unexpected changes during the mine exploitation stage

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Safety in Open Pit Mining

Draperies directly act on the stability of the blocks but also control their fall should failure occur Such systems are common practice within Australia open pit mines In surface mining draperies are used to prevent rock from impacting directly onto the concrete covers used

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The many advantages of underground mining

Apr 27 2015Choosing between open-pit mining and underground mining is a decision that every mining company makes but it is not based on the miner's whim and predilection Selection always depends on the geometry properties of the deposit its position location and type Generally startup explorers and miners begin with open-pit mining because it is

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Digging deeper Mining methods explained

Advantages of open-pit mining include Powerful trucks and shovels can be used to move large volumes of rock Equipment not restricted by the size of the opening you are working in Faster production Lower cost to mine means lower grades of ore are economic to mine The simple graphic below displays the sequence of events for the open-pit

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Open

Open-pit open-cast or open cut 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 tunnelling into the earth such as long wall mining Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface

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A simplified economic filter for open

A simplified economic filter for open-pit gold-silver mining in the United States By Singer1 Donald A Menzie2 W David and Long3 Keith R Open-File Report 98-207 This report i s preliminary and has not been reviewed for conformity with United States Geological Survey editorial standards or with the North American Stratigraphic Code

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THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT

grasp of all the parameters influencing the economics of a project including dilution In order to produce better project evaluations dilution studies should be an integral part of any project KEYWORDS Open Pit Dilution Selectivity Mining studies Mine design and Mine evaluation

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Mining Projects Exploitation Phase Methods of Mining

Jul 17 2016Figure 01 Open pit diamond mine of Mirny in Yakutia Although all types of active mining share a common aspect the extraction and concentration (or beneficiation) of a metal from the earth proposed mining projects differ considerably in the proposed method for extracting and concentrating the metallic ore (Adapted from Miller et al 2016)

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The Mining Process – Waihi Gold

1 Mining – open pit and underground To define the ore from the waste rock samples are taken and assayed Assay results are used to mark out areas of ore and waste rock which are mined separately Some of the harder areas require blasting to loosen the rock prior to excavation by hydraulic diggers

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Copper Mining and Processing Life Cycle of a Mine

Surface mining which includes strip mining open-pit mining and mountaintop removal removes soil and rock from on top of the mineral deposit It may begin as soon as the pre-development steps are complete Underground mining uses shafts and tunnels to access deeply-buried mineral deposits while the overlying rock is left in place

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Underground v s Surface Coal Mines Is Deep Drilling

Strip mining is sensible when the ore body is near the surface The practice includes some of the largest machines on earth removing long strips of overlying soil and rock and then removing coal deposits Open-pit mining utilizes blasting and mineral removing digger deeper into

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GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES

The potentially hazardous nature of open pit mining requires the application of sound geotechnical engineering practice to mine design and general operating procedures to allow safe and economic mining of any commodity within any rock mass * The intent of this guideline is to provide examples of good geotechnical engineering practice

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Mining Cost Service Free Data for Mine Cost Estimates

Mining Equipment Fleet - 10 000 tonne per day (ore + waste) open pit mine The equipment listed here represents a typical suite of equipment for a 10 000 tonne per day (5 000 tpd ore + 5 000 tpd waste) surface mine with a 3 500 ft ore haul and a 1 800 ft waste haul

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Open

Open-pit 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 open-pit mining The removal of this material is known as stripping

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Open

Open-pit 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 open-pit mining The removal of this material is known as stripping

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INTRODUCTION TO MINING

INTRODUCTION TO MINING 1 1 MINING'S CONTRIBUTION TO CIVILIZATION Mining may well have been the second of humankind's earliest endeavors— granted that agriculture was the first The two industries ranked together as the primary or basic industries of early civilization Little has changed in the

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What are some pros and cons of mining?

Jun 09 2017In a nutshell although it is an undeniable fact that mining affects our world enormously we ought not to demonize its practice while its benefits are constantly enjoyed by the large majority of people PROS I Economic incomes enormous earnings by exportation private contracts II Job offers/opportunities for locals

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Environmental Impact

Without diamond mining there wouldn't be diamonds so we should at least know some basic facts about 4 commonly used types of diamond mining based on mining techniques open pit mining hard-rock mining alluvial mining and the marine diamond mining as the latest technique all of which leave damaging effects on the earth sometimes irreversible

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Case Studies of Successfully Reclaimed Mining Sites

A truly unique reclamation project is underway near Cottbus State of Brandenburg Germany at a location called Huehnerwasser (Chicken Creek) where there was previously an open pit mine This site is owned by the Swedish mining company Vattenfall Europe Mining AG which is producing lignite in the region and is also responsible for restoration

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Mining Cost Estimating Software

Sherpa for Surface Mines is an innovative engineering-based software system that helps you estimate the costs of open-pit mining Sherpa combines engineering-based estimating procedures with cost data from CostMine's Mining Cost Service to determine the pertinent capital and operating costs associated with surface development and mining

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Mining

Large stripping machines with excavating wheels used in surface coal mining are employed in other types of open-pit mines Water inflow was a very important problem in underground mining until James Watt invented the steam engine in the 18th century After that steam-driven pumps could be used to remove water from the deep mines of the day

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INTERNATIONAL JOURNAL OF SCIENTIFIC TECHNOLOGY

entire mine and production resulting in significant process cost savings This paper outlines open pit optimization techniques that were utilized in mine planning of Okobo Coal Reserve Located in Enjema District of Ankpa Local Government Area Kogi State Nigeria as a strategy to improve the economics of the open pit mining projects

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Safety in Open Pit Mining

Draperies directly act on the stability of the blocks but also control their fall should failure occur Such systems are common practice within Australia open pit mines In surface mining draperies are used to prevent rock from impacting directly onto the concrete covers used

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Easy profit maximization method for open

1 Basic concepts Mining is essentially governed by the knowledge obtained from three scientific disciplines geology mining engineering and economics Only through an intensive program of research and field studies can a successful mining project be implemented This program must be carefully coordinated through a succession of pre-designed

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Open

Open-pit 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 open-pit mining The removal of this material is known as stripping

Get Price

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ECONOMIC ASSESSMENT AND MINE PRODUCTION

the project economics when certain variables of high importance such as the processing capacity gold price and dilution rate vary Open-pit mining operations are long-term investments and therefore are subject to possible unexpected changes during the mine exploitation stage

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Open Pit Mining Techniques

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

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