from open pit to underground

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

20-03-2018· Optimising Open Pit to Underground Cut-over: Part One. 20 March, 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. Many mines combine open pit with underground mining, and on many occasions the underground mine is an extension of the open-pit.

Mining Options Optimization: Open Pit to Underground

Mining Options Optimization: Open Pit to Underground 1 Eugene Ben-Awuah, Otto Richter, Tarrant Elkington, and Yashar Pourrahimian . Mining Optimization Laboratory (MOL) Laurentian University, Sudbury, Canada . Abstract Near-surface deposits that extend to considerable depths are often amenable to both open pit

From Open Pit To Underground - scholmanloodgieters.nl

From Open Pit To Underground. FOB Reference Price:Get Latest Price In order to get the optimal arrangement of space position between underground mining working face and openpit mine slope in coordinated openpit with underground minesthree schemes was designed to study the situation of underground mining disturbed openpit

THE TRANSITION FROM OPEN PIT TO UNDERGROUND MINING: …

International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering R. K. Brummer, H. Li & A. Moss Page 411 THE TRANSITION FROM OPEN PIT TO UNDERGROUND MINING: AN UNUSUAL SLOPE FAILURE MECHANISM AT PALABORA Richard K. Brummer*, Hao Li* & Allan Moss♦ *Itasca Consulting Canada Inc., ♦Rio Tinto Limited ABSTRACT

transition from open pit to underground in the case of chah

Transition from open-pit to underground in the case of ... 10% May 07, 2014 Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from open-pit to underground mining is an important part of …

Optimizing the open pit-to-underground mining transition ...

16-02-2017· Underground mining is used when an economically viable deposit is situated sufficiently deep such that open pit mining is cost prohibitive. There exist many underground mining techniques: (i) open stoping (), (ii) room-and-pillar, (iii) sublevel caving, (iv) drift-and-fill, (v) longwall, and (vi) block caving.Determining which method(s) to use is typically based on geotechnical constraints ...

Planning Considerations For Transition From Open Pit To ...

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 to be taken into account in the planning cycle are as follows: Definition of the ore body.

Open Pit To Underground Transition | SRK Consulting

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 ...

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.

from open pit to underground - bass-immobilien.ch

Open Pit To Underground Transition Cave Mining Forum. 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.

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

05-04-2018· As the underground mine operates at a higher cut-off grade than the open pit, it will deliver a higher grade and normally higher cashflow for the same throughput. Therefore there is likely a discounted cash flow to benefit generating this cash-flow early …

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

A model for determining optimal transition depth over from ...

Open Pit (OP), underground (Ug) methods or both of them are selected depending on the geometry properties of the deposit, its position with respect to the surface and so on (Camus, 1992). In a choice between Op and Ug methods, the other most significant factors to be taken into account, are: a) size, shape, and depth of deposit;

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.

Opencast to underground iron ore mining method | SpringerLink

28-07-2018· At the end of the open-pit mining process in large metal mines, the mining model must change from open-pit mining to underground mining, but the mutual interference between the two mining models leads to poor production safety conditions and difficulties in production convergence during the transition period.

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

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 to be taken into account in the planning cycle are as follows: Definition of the ore body.

from open pit to underground - kachelaanbiedingen.nl

· 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.

v116n8a13 Where to make the transition from open-pit to ...

The transition from open pit (OP) to underground (UG) operation is one of the challenging mining engineering issues. 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.

Optimizing the Open Pit-to-Underground Mining Transition

from open pit to underground mining in both a spatial and a temporal sense. This transition incorporates a crown pillar placement that separates the open pit from the underground mine, and of the sill pillars, i.e., levels left in situ that can grant earlier access to stopes by creating a false bottom.

(PDF) Transition from open-pit to underground as a new ...

Journal of Mining Science, Vol. 45, No. 5, 2009 TRANSITION FROM OPEN-PIT TO UNDERGROUND AS A NEW OPTIMIZATION CHALLENGE IN MINING ENGINEERING E. Bakhtavar, K. Shahriar*, and K. Oraee** UDC 622.27.326 There are many deposits that have the potential to be mined by a combined method of open-pit and underground.

Operations Strategy Formulation: Shifting From Grasberg ...

01-04-2021· PT Freeport Indonesia has decided to alter its mining operations from open-pit mining to underground mining in Grasberg. A change of mining area focus directly affects its related departments, and even need new operations strategy to address the transition.

FROM OPEN PIT TO UNDERGROUND - jurajskimlyn.pl

open-pit to underground mining as a new challenge in mining engineering, a mathematical programming based model considering the block economic values of open-pit and Read more the difference between underground and open pit. live chat. Mining Sites: The Transition from Open.

From Open Pit To Underground - rgwoodproducts.nl

Open Pit And Underground Mines Design, Optimization And Our expertise extends to mining engineering at the design and operation stage for open and underground mines. We use sophisticated tools and proven methods that improve the optimization and planning of operations, always in regard to the individual characteristics of the mineral deposit and of the operational context of the mine.