Product Supply Information

Home >china hot sale wet ball mill machine>from open pit to underground

from open pit to underground

THE TRANSITION FROM OPEN PIT TO UNDERGROUND

2006322International 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 openpit to underground as a new ...

During the model, NPV of openpit is compared to the value of underground for the similar levels. A hypothetical example is used in order to analyze the model in detail. Based on the assumptions made such as: a discount rate of 15 , each pair of contiguous levelcuts have to mine during one year, and one level as the height of crown pillar, the optimal transition depth was determined to be equal to 62.5 m.

Transition from open pit to underground using Mixed ...

2017130The determination of transition point from openpit OP to underground UG is one of the most challenging mining engineering problems. The shallow deposits which vertically extend to considerable depth will have potential to make the transition from OP to UG.

Transition from openpit to underground in the case

201457Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from openpit to underground mining is an important part of the mining design process in large and massive deposits.

Optimization of the transition from openpit to ...

20121213Openpit mining is the most widely appliedsurface mining method and is by and largeregarded to be economically superior to mostunderground methods, due mainly to higherrecovery and production capacity. However,underground mining can be considered asbeing more acceptable than openpit miningfrom the environmental and socialperspectives, since it often leaves a smallerfootprint.

Mining Options Optimization: Open Pit to Underground

2015910Open pit mining usually features a relatively lower mining cost, higher strippingratio and longer time to access ore. Underground mining on the other hand features a higher mining cost, higher grade and earlier access to ore Anthony, 2012. There are currently limited tools or

Transition from openpit to underground in the case

Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from openpit to underground mining is an important part of the mining design process in large and massive deposits. In this paper, a geological block model of ChahGaz iron ore deposit located in Iran was first created based on iron ore cutoff grade.

Optimizing the open pittounderground mining

2017216Because the transition from open pit to underground extraction affects a mine for the remainder of its operational life, it falls into the category of strategic scheduling. At the time of this writing, a large number of metal deposits are being extracted via surface methods, but plan to transition to concurrently or exclusively extracting ore via underground mining methods.

Practice of Transferring from Openpit to Underground

Based on the practice of transferring from openpit to underground mining in Baoguo iron ore of Tiedanshan ore field,many problems are successfully solved,such as stoping of the hanging wall ore,improving the mining of bottom ores in the openpit,forming the waste ...

PDF Transition from openpit to underground as a

First, both openpit and underground block models must be separately generated. Then, it is necessary to establish a long range mining plan for the deposit. Thus a new terminology, socalled levelcut, is introduced which assigns both openpit and underground

THE TRANSITION FROM OPEN PIT TO UNDERGROUND

2006322International 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 openpit to underground in the case

Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from openpit to underground mining is an important part of the mining design process in large and massive deposits. In this paper, a geological block model of ChahGaz iron ore deposit located in Iran was first created based on iron ore cutoff grade.

Transition from open pit to underground using Mixed ...

2017130Transition from openpit to underground using Mixed Integer Programming considering grade uncertainty J.CHUNG1 2 , E. TOPAL and O.ERTEN3 1,2,3Department of Mining Engineering and Metallurgical Engineering Western Australia School of Mines, Australia, email160protected presenting author Abstract

... from openpit to underground mining ...

To trace the potential hazards of openpit slope in Longshou mine,global positioning systemGPS is applied to monitoring ground movement and deformation induced by transition from openpit to underground mining.Through longterm monitoring from 2003 to 2008,huge amounts of data were acquired.Monitoring results show that largescale ground movement and deformation have occurred in ...

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

openpittoundergroundopenpitto ...

open pit to underground For a mine to be changed from an open pit to underground stope, the stability of the ...

Practice of Transferring from Openpit to Underground

Based on the practice of transferring from openpit to underground mining in Baoguo iron ore of Tiedanshan ore field,many problems are successfully solved,such as stoping of the hanging wall ore,improving the mining of bottom ores in the openpit,forming the waste ...

Optimizing the open pittounderground mining

2017216Underground 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 roomandpillar, iii sublevel caving, iv driftandfill, v longwall, and vi block caving.Determining which methods to use is typically based on geotechnical constraints ...

Stability of boundary pillars in transition from open pit to ...

20121024underground openings. Few studies have addressed the stability of a stope structure involving the boundary pillar underneath the open pit 10. This work presents a practical example of boundary pillar design in the transition from open pit to underground mining

... from openpit to underground mining ...

To trace the potential hazards of openpit slope in Longshou mine,global positioning systemGPS is applied to monitoring ground movement and deformation induced by transition from openpit to underground mining.Through longterm monitoring from 2003 to 2008,huge amounts of data were acquired.Monitoring results show that largescale ground movement and deformation have occurred in ...

PDF Transition from openpit to underground as a

First, both openpit and underground block models must be separately generated. Then, it is necessary to establish a long range mining plan for the deposit. Thus a new terminology, socalled levelcut, is introduced which assigns both openpit and underground

Transition from openpit to underground in the case

Geological and economic modeling of an ore body and also optimization of the depth at which transition is made from openpit to underground mining is an important part of the mining design process in large and massive deposits. In this paper, a geological block model of ChahGaz iron ore deposit located in Iran was first created based on iron ore cutoff grade.

Planning Considerations For Transition From Open Pit

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.

openpittoundergroundopenpitto ...

open pit to underground For a mine to be changed from an open pit to underground stope, the stability of the ...

transition from open pit to underground mining

The transition from openpit to underground mining operations is a frequently occurring procedure for mines around the world. The Akyem Gold Mine in Ghana is an example, where the transition is to be optimized with regard to the significant reduction in yearly throughput. Get price

NUMERICAL MODELING OF OPEN PIT OP TO

20161019of open pit mines or underground mines, their operation 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. Overview of major historical and future OPUG transitions for ore body ...

underground mining from open pit ...

201726underground mining from open pit underground mining from open pittransition from opencut into underground mining Mining from Openpit to Underground Mine Transferring from ...

Transition of the Ernest Henry Mine from Open Pit to

Situated in northwest Queensland, Australia, the Ernest Henry Mine EHM has been producing copper and gold since 1996. Owned and operated by Glencore Xstrata, ore is currently sourced from a newly developed underground sublevel cave SLC mine below the old EHM open pit the pit. Ore feed to the concentrator is supplemented by satellite open pits comprising the Mount Margaret operation.The ...

ground movement and deformation induced by transition from openpit to underground

To trace the potential hazards of openpit slope in Longshou mine,global positioning systemGPS is applied to monitoring ground movement and deformation induced by transition from openpit to underground mining.Through longterm monitoring from 2003 to

Related Posts: