2 Mining Methods - Copper

Open pit mining is a technique used to extract copper ore near the earth's surface Open pit mining is the most widely used technique of mining copper today It is accomplished by creating and using benches or terraces to gradually reach deeper under the earth's surface Underground mining is used when the copper ore is not near the earth's ....

Differences between underground mining and open pit mining ,

Apr 02, 2018· The Witwatersrand gold mine in South Africa is an excellent example of underground mining that exploits gold from ancient rocks at depths of up to 4 km underground What is open pit mining On the other hand, open-pit mining is the most common mining and ranges from very low-priced minerals to finely disseminated gold deposits...

Mining Through Underground Workings in Fimiston Open Pit ,

The pit area has been continuously worked since 1893, predominantly by underground mining methods and more recently through open cut mining There are over 2000 km of old mine headings and numerous stopes under the open pit area KCGM has interpreted and digitised the underground mine plans and stope sections into a common database...

Mining Through Underground Workings in Fimiston Open Pit ,

The pit area has been continuously worked since 1893, predominantly by underground mining methods and more recently through open cut mining There are over 2000 km of old mine headings and numerous stopes under the open pit area KCGM has interpreted and digitised the underground mine plans and stope sections into a common database...

OPEN PIT MINING THROUGH UNDERGROUND WORKINGS

OPEN PIT MINING THROUGH UNDERGROUND WORKINGS 20 LEGISLATIVE REQUIREMENTS (WA) The Mines Safety and Inspection Regulations 1995 includes a provision (Regulation 138) relating to surface mining operations where mining is being conducted through or in...

A stochastic optimization formulation for the transition ,

As open pit mining of a mineral deposit deepens, the cost of extraction may increase up to a threshold where transitioning to mining through underground methods is more profitable This paper provides an approach to determine an optimal depth at which a mine should transition from open pit to underground mining, based on managing technical risk...

Underground Mine Mapping -- Mining Methods - Minnesota DNR

One to all three methods could be utilized at a given mine Often a mine would start out as an underground operation and later become open pit Open pit mines may host scramming operations via adits into pit walls, thus employing underground methods Mining Methods Milling was a combination of open pit and underground mining...

From open pit to underground - Henan Mining Machinery Co ,

Advantages and disadvantages of open pit mining Apr 02 2018Advantages and disadvantages of open pit mining Open pit mining is profitable when the deposit is not very deep or when the terrain is sandy or delicate so that underground mining is not possible Labor costs are lower both in excavation and transportation and allow the use of Live Chat...

Rosemont Underground Gold Mine, Western Australia

The underground mine will be accessed through a decline from the existing open-pit, which will also help in fresh air intake Primary exhaust adits are proposed to enter the open-pit in order to avoid vertical development through oxidised and transition zone material The mined material will be conveyed to the surface by trucks...

Our open-pit mines - LKAB

The surrounding rock is removed before the ore at the same level can be mined Bench mining is an effective and well established mining method, which allows maximum extraction from the rock with a high degree of safety Open-pit mining takes place in several stages: Shaping...

Mining Terms - kau

Examples for Underground Mining Important Terms of Underground Mining Some , is the maximum vertical and lateral extent which may be excavated economically in an open pit mine , Any material that has been through a mineral processing plant and has been rejected as waste...

Weebly - Mine Operations Underground & Open Pit

Open pit mining occurs close to Earth's surface where soil and rock are removed by using mechanical mining and explosiv The mine is open to the atmosphere and does not occur below the surface of the Earth However, open pit mining can be as damaging as underground mining as it is environmentally destructive Dust from mining operations ....

NUMERICAL MODELING OF OPEN PIT (OP) TO ,

Numerical modeling of open pit (OP) to underground (UG) transition in coal mining 37 In recent years, with the development of computer science, numerical methods become more and more popular in solving problems of geo-engineering They prove particularly useful when their results are used for comparison with the results of observations under...

Reading: Mining | Geology

Open-Pit Mining Open-pit mining, or open-cast 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 tunneling into the earth, such as long wall mining...

Digging deeper: Mining methods explained | Anglo American

Open-pit, underground and underwater These are the three main methods of mining we use at Anglo American to extract our products from the ground In this Digging Deeper article, we take a look at these different methods and provide a glimpse into what each involv...

Open-pit mining - Wikipedia

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 miningOpen-pit mines are used when deposits of commercially useful ore or rocks are found near the surface...

Uranium mining - Energy Education

Mining In general, uranium mining is relatively similar to other kinds of mining unless the ore is very high grade In this case, special mining techniques are used to limit worker radiation exposure and to ensure the safety of the environment and general public Depending on the deposit, uranium is mined in one of three ways: open pit, underground, or in situ recovery...

A stochastic optimization formulation for the transition ,

As open pit mining of a mineral deposit deepens, the cost of extraction may increase up to a threshold where transitioning to mining through underground methods is more profitable This paper provides an approach to determine an optimal depth at which a mine should transition from open pit to underground mining, based on managing technical risk...

Underground Mining - Mining and Geomorphology

The truth of the matter is that more often than not, open pit mining and underground mining go hand-in-hand When open pit mining, the most geomorphic intrusive mining method, is no longer cost effective, underground mining takes over (where possible) However, the damage has been done to the surface of the land...

Underground Mining - Mining and Geomorphology

The truth of the matter is that more often than not, open pit mining and underground mining go hand-in-hand When open pit mining, the most geomorphic intrusive mining method, is no longer cost effective, underground mining takes over (where possible) However, the damage has been done to the surface of the land...

Gold Mining from Open Pit Extraction to Heap Leaching ,

Jul 08, 2016· Gold Mining from Open Pit Extraction to Heap Leaching - Educational 3D Animated Video For more information and to request a FREE estimate, contact us today: ....

TRANSITION FROM OPEN-PIT TO UNDERGROUND AS A NEW ,

open-pit method, and if it proves to greater depths the open-pit mine will economically transfer to a suitable underground mining method On the other hand, it is essential to exploit the ore ....

Mining Through Underground Workings in Fimiston Open Pit ,

The pit area has been continuously worked since 1893, predominantly by underground mining methods and more recently through open cut mining There are over 2000 km of old mine headings and numerous stopes under the open pit area KCGM has interpreted and digitised the underground mine plans and stope sections into a common database...

Open Pit to Underground Transition - Minxcon Group

underground mining cost would be equivalent The table below details some assumptions to illustrate this method When the pit reaches a depth where the stripping ratio (t w:t o) is 1171 the mining cost for surface and underground is equal Stripping Ratio Underground Mining Cost (UG) USD total /t ore 4500 Open Pit Mining Cost (Ore) USD/t ore 400...

Open-pit mining - SourceWatch

Open-pit mining or opencast mining refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow It is a form of surface mining The term is used to differentiate this form of mining from extractive methods that require tunneling into the earth, like longwall mining...

Open Pit Mining through Historic Underground Workings ,

As the price of gold rises, lower grade ores can be profitably mined by open pit mining In some districts, these lower grade ores remain around historic underground workings Mining through historic underground workings, which often occur as voids, is a challenging and comprehensive process...

Determining the open pit to underground transition: A new ,

unnamed mine has an existing underground mine and is contemplating an open pit expansion that could mine material that would otherwise be mined in a future underground expansion These authors were able to compare a number of different transition scenarios, each with optimised schedules and cut-offs...

Mining Through Underground Workings in Fimiston Open Pit ,

The Kalgoorlie Consolidated Gold Mines (KCGM) Fimiston Open Pit is located on the eastern boundary of the Kalgoorlie-Boulder City and is mining an area traditionally known as the Golden Mile The pit area has been continuously worked since 1893, predominantly by underground mining methods and more recently through open cut mining There are over 2000....

Open Cast Mining Advantages

In the previous topic, we saw which are some of the advantages that can make the surface open pit mining methods superior method compared to the underground mining However, underground mining has its own advantag And finally, the ultimate decision to mine from the surface or from underground comes down to the specific characteristics of the deposit...

Open Cut and Underground Mining | iMINCO

Underground Mining Underground Mining is generally used for areas where the mineral seam is too far underground for open cut mining to be of use 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 ....