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These are intended as an aid to engineering judgment for decision makers at the prefeasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering the interaction between block cave mining and a large overlying open pit, focusing on caving induced steppath failure initialization.
This paper supplements a keynote address prepared for the 2010 Second International Symposium on Block and Sublevel Caving. The author gauges the cave mining industry''s position (practice and theory) since the publication of what he considers a seminal paper on ''Cave mining – state of the art'' (Laubscher, 1994), hence ''16 years after''.
In order to complete this thesis work, a literature study on sub level caving mining, shock wave interactions in blasting, effect of delay timing and a study on fragmentation models has been done. The overall process involved a literature study, construction and preparation of smallscale models,
Incorporation of 3D Mixing in Longterm Production Scheduling Optimization for Block Caving Mines. Author / Creator Khodayari, Firouz; As openpit mines go deeper, because of the massive amount of waste removal which is required to extract the ore as well as high operational costs per tonne, underground mining has become more attractive.
Longwall Longwall in coal Longwall in Hard Rock Sublevel Caving Characteristics of the ore body and mining method Development Production Equipments Used Block Caving Introduction Historical ...
Jun 01, 2019· The business case to continue with the mining of the Chuquicamata orebody is to change from the current large open pit to a novel macroblock variant block caving geometry. This requires a production rate of 140,000 t/d (50 Mt per annum), with a continuous material handling system to achieve the 7year rampup to full production.
There are several different methods of cave mining, including block, panel, sublevel and inclined. This thesis focuses specifically on block/panel caving, in which an ore column of finite width, length and height is drawn from a horizontal array of drawpoints at its base.
Contributions made by this thesis 3 II LONG TERM PLANNING IN A BLOCK CAVE MINE 5 II. 1 Introduction 5 Block Cave Mining Method 6 Traditional Steps in Planning a Block Cave Mine 7 ... Figure 310: Comparison between methods to compute mining reserves in Block Caving 50 Figure 311: Comparison between methods to compute mining ...
in block caving shows that it is similar to or higher than the traditional drill and blast rate. The research developed in this thesis presents an opportunity to improve the quality of undercutting, ensuring the cut of the block and eliminating the risk of a remnant pillar that would affect the production level.
Block Caving. Block caving is largescale mining method that allows for huge volumes of rock to be extracted efficiently. However, the development time before production starts is longer compared to other mining methods. By drawing rock from the extraction level in the lower part of the mine, a .
This thesis aims to further the understanding of caving geomechanics. Multiple factors affect block caving, making understanding the process for optimisation a challenge. This thesis uses a systems approach coupled with virtual reality scientific visualisation as a tool to integrate data from the block cave mining system to understand ...
Vol. 40, No. 3, May–June 2010, pp. 222–245 issn eissnX 10 4003 0222 informs ® / ©2010 INFORMS A Review of Operations Research in Mine Planning
(2017). Modelling of preconditioning by blasting in block and panel caving. Mining Technology: Vol. 126, No. 2, pp. 5976.
Hudyma, M, Potvin, Y Allison, D 2007b, ''Seismic monitoring of the Northparkes lift 2 block cave—Part 2 production caving'', Proceedings of the 1st International Symposium on Block and Sublevel Caving, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 335–354.
These are intended as an aid to engineering judgment for decision makers at the prefeasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering the interaction between block cave mining and a large overlying open pit, focusing on caving induced steppath failure initialization.
The notion of the mine of the future using caving methodsis becoming high priority with most major mining companies globally applying or intending to apply block and panel caving methods because of the need to develop new ways to achieve safer, more sustainable, high value, higher productivity and higher recovery bulk underground mining.
place. A block caving system will have to include these lowgrade areas within the ore body and this will naturally lower the overallgrade of the ore recovered. Because of this, block caving can only be applied to the larger, more uniform deposits of the Gogebic Range. Small, irregular deposits must still be mined by conventional mining methods.
Block and panel caving mines are prone to mud rushes in their production levels, with mud flowing from the drawpoints. Different mines have developed methods to control drawpoint conditions and thus perform safe ore extraction.
Montecino N (2011) Mixing model of secondary fragmentation in block/panel caving mining. Master thesis, University of Chile, Chile (in Spanish) Nakata Y, Hyde A, Murata H (1999) A probabilistic approach to sand particle crushing in the triaxial test. Geotechnique 49(5):567–583.
The four methods are: chamber and pillar mining, sublevel stoping with spent shale backfill, sublevel stoping with full subsidence, and block caving using load haul dump (LHD). All more » mine designs were developed for 85,000 tons per day minimum production or enough feedstock for 50,000 barrel per day surface processing plant.
block caving at depth. Introduction: Currently, there are over 80 mines worldwide that have either used or plan to use block caving mining methods to extract ore from massive, weak, lowgrade orebodies. Many of these mines were once open pit projects that have eventually transitioned to block caving techniques as open pit techniques became
SMIBRC alumnus awarded international prize for mining PhD thesis. 20 Aug 2013. Former BRC student Dr Matthew Pierce has been awarded the 2013 Manuel Rocha Medal for his thesis A Model for Gravity Flow of Fragmented Rock in Block Caving Mines by .
Caving (, Sublevel and Block) mining methods are v aried and versatile an d involve ca ving the ore and/ or the overlying rock. Sub sidence of the surface normally occu rs afterwar d.
The object of this handbook is to highlight factors which lead to problems in cave mining and to summarize the contents of the "Manual on Block Caving" so as to provide a reference on all facets of cave mining. The same format as the revised manual has been used so that the details of the subject can be referred to in the manual.
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