from open pit to underground





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Optimising Open Pit to Underground Cut

05-04-2018 0183 32 Optimising Open Pit to Underground Cut-over Part Two 5 April, 2018 This article was first published in the Snowden newsletter in July 2011 and we believe many of the ideas presented are still relevant today Read part 1 here There are typically three approaches to determining the cut-over point They are discussed below Biggest economic pit...Know More

How to transition open

02-10-2020 0183 32 As open-pit mines reach their economic end of life, mine owners are considering the viability of transitioning their open-cast mining operations to underground Drawing on their deep level mining expertise in South Africa, Worley assists mine owners around the world explore the feasibility of underground life of mine extensions and identify the most efficient and safe ,...Know More

TRANSITION FROM OPEN PIT TO UNDERGROUND MINING AT ,

Manager, Chuquicamata Underground Mining Project, CODELCO Mr Antonio Karzulovic Geotechnical Consultant, A Karzulovic Assoc Ltd ABSTRACT The economical analyses of different Chuquicamata open pit mine planning scenarios, indicate that the pit closure should occur at latest in the year of 2017 However, about...Know More

An Approach Towards Ascertaining Open

Open pit or underground Going underground, or not International Mining Magazine, January, pp 48-50 3 Bakhtavar, E, K Shahriar and K Oraee, 2008 A model for determining optimal transition depth over from open-pit to underground mining Proceedings of the 5th International Conference on Mass Mining, June 9-11, 2008, Lulea, Sweden, pp ....Know More

Determining optimal open pit to underground mine ,

Years of open pit mine production results in a pit of increased width and depth This causes the cost of producing deeper ore to increase The ore produced can also be more heavily diluted by surrounding waste In order to increase the amount of economic reserves and mine life, a transition to underground mining can be made There is a threshold where mining through ,...Know More

Open Pit To Underground Transition

Open Pit To Underground Transition Author s Simon Hanrahan First Presented SRK News - Issue 56 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...Know More

Transition from Open Pit to Underground Mine

Planning Considerations The efficient transition from open pit mining to an underground operation requires extensive planning For a large mining operation, planning could last as long as 20 years The main factors and activities that need ,...Know More

Optimization of the transition from open

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...Know More

Paper Considerations for open pit to underground ,

Abstract A large volume of work is available in the industry on many aspects relating to the interaction between open pit and underground mining Various authors have addressed the optimisation of the transition problem to determine the optimal economic point to transition from open pit mining to underground mining...Know More

NUMERICAL MODELING OF OPEN PIT OP TO UNDERGROUND ,

of open pit mines or underground mines, their opera-tion is nowadays being run at constantly increasing depths, whereas in the case of open pit mines, further increase of exploitation depth proves impossible due to economic and technological limitations, as well Table 1...Know More

PDF Transition from Open

depth from open-pit to undergrou nd or vice versa To calculate this depth, a m odel based on block economic values of open-pit and underground m ethods ,...Know More

Transition from open

09-12-2009 0183 32 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 To calculate this depth, a model based on block economic values of open-pit and underground methods together ,...Know More

Planning Considerations For Transition From Open Pit To ,

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 rush The presence of an abandoned pit ,...Know More

Mining Sites The Transition from Open

Abstract The transition from open pit OP to underground UG operation is one of the challenging mining engineering issu Mines that have the potential to transition from OP mining to UG mining will eventually come to a transition point where the decision needs to be taken whether to extend the pit or switch to UG mining...Know More

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 rush The presence of an abandoned pit above can lead to greater risks of dilution and mud rush The choice of underground mining method affects ....Know More

Worley out to help miners on their open pit to underground ,

23-09-2020 0183 32 As open-pit mines reach their economic end of life, mine owners are considering the viability of transitioning their open-pit operations to underground Drawing on its deep level mining expertise in South Africa, Worley helps mine owners around the world to explore the feasibility of underground life of mine extensions and identify the most efficient and safe ,...Know More

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 faciliti...Know More

Water inrush characteristics and hazard effects during the ,

During the transition from open-pit to underground mining in iron ore mines, water inrush is a prominent problem for mine safety and production In this paper, a comprehensive method that incorporates hydrochemical analysis and numerical simulation is proposed to analyse the characteristics of water ,...Know More

Planning Considerations For Transition From Open Pit To ,

Open Pit Mine Design, Planning, and Engineering Underground Mine Design, Planning, and Engineering Mining Geology for Planning and Optimization...Know More

Mining Sites The Transition from Open

PDF Transition from Open-Pit to Underground as a New...Know More

Planning Considerations For Transition From Open Pit To ,

Key considerations to evaluate are open pit stability, shaft stability, dilution, mud rushes and air blasts, and mining method selection Planning Considerations The efficient transition from open pit mining to an underground operation requires extensive planning For a large mining operation, planning could last as long as 20 years...Know More