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Transition from open-pit to underground as ... - SpringerLink

Abstract. There are many deposits that have the potential to be mined by a combined method of open-pit and underground. In this manner, the most sensitive problem is the determination of the optimal transition depth from open-pit to underground or vice versa.

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Transition from Open Pit to Underground Mine

Transition from open pit to underground mining often risks mud rushes (if mud forming minerals are present), and from sumps and surface dams. Air blasts can result from underground collapses or mud rushes. The presence of an abandoned pit above can lead to greater risks of dilution and mud rushes.

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THE TRANSITION FROM OPEN PIT TO UNDERGROUND …

THE TRANSITION FROM OPEN PIT TO UNDERGROUND MINING: AN ... After completion of the open pit mining, a cave was initiated about 400 m below the pit floor, as shown in Figure 1. Contemporaneous with the cave breakthrough into the pit floor in late 2003 and early 2004, anomalous movements become apparent, and it was clear that portions ...

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Determining the open pit to underground transition: A new ...

1 Determining the open pit to underground transition: A new method D Whittle 1, M Brazil 2, P A Grossman 3, J H Rubinstein 4, D A Thomas 5, 1. MAusIMM, Graduate Researcher, Department of Mechanical Engineering, The University of

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(PDF) Transition from Open-Pit to Underground as a New ...

PDF | There are many deposits that have the potential to be mined by a combined method of open-pit and underground. In this manner, the most sensitive problem is the determination of the optimal ...

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NUMERICAL MODELING OF OPEN PIT (OP) TO …

loss of stability of an open pit slope. The numerical analysis proved that the values of open pit slope displacements were affected mainly by underground exploitation depth, direction of operation (i.e., from one slope to the other) and the distance from the slope plane.

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Underground Development - Oyu Tolgoi LLC

While we currently produce all of our concentrate from the open pit, the best minerals, over 80 per cent of Oyu Tolgoi's total value lies deep underground. It is …

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Underground Mining - Vale - Open Pit Mining - YouTube

May 08, 2013· Canada and global mining industry This is one of a series of videos I edited for Vale. The producer I worked for travelled to many locations around the world. Shots were taken in the air, on the ...

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The Mining Life: Open Pit vs. Underground - MICROMINE

Aug 22, 2017· The Mining Life: Open Pit vs. Underground. August 22, 2017. The mining life is not for everyone. Miners work long hours, often far from home, in one of the most physically-demanding positions out there. While it's up to the executives, the managers, and the other stakeholders to install the best designs for an underground or open pit mine ...

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Mine dewatering techniques - SlideShare

Jul 31, 2013· Mine dewatering techniques for open pit and underground mines Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.

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Mine dewatering techniques - SlideShare

Nov 23, 2013· Synopsis • Definition of mine dewatering • Open pit surface water control • Open pit dewatering techniques • Underground mine dewatering techniques • Groundwater investigation techniques 4. Definition of Mine Dewatering Dewatering and groundwater control forms a vital part of many mining projects.

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MINING EQUIPMENT NAMES underground and open pit minery

What is open pit mining? Open pit mining is the most common mining technology when it comes to new mines. In this technique, the soil is excavated and the mineral separation and the remaining soil material occurs on the surface. The first step in this process is the …

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The PIT Underground | Peoples Improv Theater

← See All Our Locations The PIT Underground. 123 E 24th St (b/t Park & Lex) New York, NY 10010 212-563-7488. Getting to the PIT Underground. Subway 6 Train to 23rd St

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Optimising Open Pit to Underground Cut-over: Part One ...

Many mines combine open pit with underground mining, and on many occasions the underground mine is an extension of the open-pit. This article is the first of two articles that looks at some of the challenges associated with this situation, and some methods with which to determine the cut-over point from open pit to underground mining and the implications these have on project value.

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Open Pit to Underground Transition | SRK Consulting

SRK carried out a scoping study on an existing open pit operation (12 Mtpa) that is soon to be reaching a depth where the mine will need to transition to a large-scale underground mining method. The goal was to provide production continuity at a rate that will still be suitable to maximise use of the existing surface processing facilities.

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Operate an open pit over and through the voids of an old ...

Younès TAHIR, Said Rziki, Tarik Soror, Mohammed Sellami, and Mohammed Karim Benhachemi, "Operate an open pit over and through the voids of an old underground mining: Case of Tazalaght copper Ore open pit mine," International Journal of Innovation and Applied Studies, vol. 14, no. 1, pp. 37–45, January 2016.

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Open Pit and Underground Mining Safety - YouTube

May 21, 2018· Both Open Pit and Underground Mining operations come with a degree of risk. Learn how Firwin products help to make the mining process safer, cleaner, and more productive. For more information ...

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Optimization of the transition from open-pit to ...

from open-pit and underground mining, (0-1) integer programming has been used. In this method, block economic values of open-pit and underground methods should be imported to the transition model. A hypothetical example is presented in order to assess the model in detail. Keywords open-pit, underground, transition depth, optimization, (0-1) integer

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Open-Pit to Underground Transition Optimiser - ThreeDify Inc

GeoMine Optunimizer (Optunimizer) is an Open-pit to Underground Transition Optimizer. Optunimizer allows a mine planner to determine the optimal transition zone from open-pit to underground mining with the objective of maximizing total profit of the entire mine. Optunimizer is built on top of three ThreeDify optimizers: FlowPit for pit ...

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Chidliak diamond mine could be both underground and open pit

If the resource at depths below 260 m is of sufficient size and diamond grade, a new PEA outlining an underground mining operation for this material, in addition to the existing open-pit operation, could be completed in the first quarter of 2018. Total cost for the 2017 work program is estimated at C$7.5 million.

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Open Pit and Underground mining systems Research Papers ...

View Open Pit and Underground mining systems Research Papers on Academia.edu for free. ... Una cartografía desbordada de espacios del "underground" en Buenos Aires Itineraries and experimentation in the art of the 80s. A cartography of spaces of the "underground" in Buenos Aires Resumen Hacia finales de la dictadura y principios de la ...

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Reading: Open-Pit Mining | Geology

Reading: 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.

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Optimising Open Pit to Underground Cut-over: Part Two ...

Planning to mine a deposit from both open pit and underground (sometimes at the same time) is complex. Part two of our article on Optimising Open Pit to Underground Cut-over discusses the three typical approaches to determining the cut-over point.

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Underground versus Open Pit Mining - Firwin Corp's Blog

Underground versus Open Pit Mining ... Unlike open pit, underground mining requires that you take into account a wide variety of added requirements. These include complex ventilation systems, area and local ground support, and of course finding a consistent, safe, and cost-effective way to get your materials to the surface. ...

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The Advantages of Open Pit Mining | Sciencing

Mar 13, 2018· Open pit mining does offer some advantages over traditional deep shaft mining. Pit mining is more cost effective than shaft mining because more ore can be extracted and more quickly. The working conditions are safer for the miners because there is no risk of cave in or toxic gas. Open pit mining is the preferred ...

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High-grade gold-copper open pit and underground mine – AMC ...

Access to high-grade underground ore was brought forward by two years. 33% mine productivity rate increase from 1.2 Mtpa to 1.6 Mtpa over a longer underground mine life. Reduced open pit waste mining by nearly 70 million tonnes. Improved project economics including …

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Mine Dewatering and Water Management at Barrick …

Mine Dewatering and Water Management at Barrick Goldstrike Mine in the Carlin Trend, Nevada ... Open Pit 400 m 3,700 m 2,000 m 7 ... Underground Mines Pre-mining water table 1600 m amsl Current water table 1100 m amsl with a drawdown of 500 m 8. April 3-5, 2012 U.S. EPA Hardrock Mining Conference 2012 2. Goldstrike Dewatering System

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Mining Sites: The Transition from Open-Pit to Underground ...

Jul 10, 2019· Open-Pit Mining. Open-pit mining can also be identified as open-cast or open cut mining. The practice operates above ground, always at the surface, extracting minerals and rocks from the surface. Open-pit mining presents less dangers in comparison to underground mining - these surface mines do not need to tackle issues such as air loss and cave ...

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