Caving procedure at the Crestmore Limestone Mine of …

2020-10-28 · BLOCK. DEVELOPMI~~T. The first blooks to be caved were developed very much atter. the prooedure. followed in the copper mines of Arizona. This. paper covers the ninth. block. to. be. oaved. With a. hard, tough rock. like our. limestone. it. was. found that some alter­ ations in the development and control of draw. in. caving were necessary to ...

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Predicting fragmentation characteristics of a block caving ...

2020-4-2 · mined by block caving. If an orebody is suitable for mining by block caving, the fragmentation characteristics will have a bearing on the method of ore extraction. Suitability of an Orebody to Block Caving Ideally the orebody should be such that the rock within the stope fails readily and the area outside the stope remains intact.

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Productivity of a Continuous Mining System for Block ...

Block caving mining is one of the most cost-effective underground mining methods. The method has particular relevance in the Chilean mining industry, where approximately 40% of the Chilean national copper production comes from block caving mines.

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Block Caving Production Layout... | ERA

Block Caving Production Layout Optimization Considering Uncertainty in Grade Models. Author / Creator Ugarte-Zarate, Efrain; The mining industry of today demands large-scale extraction methods, and caving has become the preferred underground mining technique because of high production rates, low mining costs, and low waste production.

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(PDF) Dilution-based Stability Graph for Open Stope Design

Block caving is the preferred underground mining method to profitably extract massive, low-grade orebodies; however, lack of cave access inhibits understanding the rockmass response to mining ...

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Block Caving

2012-12-21 · Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight. It is the underground version of open pit mining. In block caving, a large section of rock is …

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Surface Subsidence and Collapse in Relation to Extraction ...

2010-11-16 · Progress of subsurface subsidence induced by the block caving mining method. Caving is initiated by removing support (a) and exceeding the span (b). Removing ore creates void into which additional rock can fall (c) and if unchecked the broken zone can breach the surface (d). (Modified from Obert and Duvall, 1967.) ...

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Physical and Numerical Modelling of Cave Propagation ...

An Extended Conceptual Model of Caving Mechanics. PhD thesis, The University of Western Australia. Cumming-Potvin, D. and Wesseloo, J. (2014). Assessing the state of the rock mass in operating block caving mines: A review. 3rd International Symposium on Block and Sublevel Caving…

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Our open-pit mines

The ore in the Svappavaara field''s active open-pit mine, Leveäniemi, is extracted by mining the ore in descending levels. The thickness of the slabs, known as the bench height, is 15 metres, and the slabs are worked downwards. In the first stage, the ore is extracted at one level before moving down a step (15 metres), after which the ore is ...

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Estimation of the potential production rate ...

2019-6-28 · Since this mine is a room and pillar mine, the most appropriate version would be Long''s 2009 open pit and block caving modification. The a factor will be 0.123 and the b factor will be 0.649. The resulting equation will be: Assuming the mine operates 350 days a year, the mine …

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Incorporation of 3-D Mixing in Long-term Production ...

limitations of the ‎mine. The major novelties of this thesis are: determination of the best mining direction in the block caving layout and defining precedence of drawpoints accordingly, NPV maximization for block caving mines using mathematical programming where technical constraints of the operations are

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Matthias Wimmer › Researchers › HLRC

02/2008 Block caving principles (academic course) University of the Witwatersrand, Republic of South Africa . 02/2006 Rock fragmentation by blasting (academic course) Austrian blasting certification. University of Leoben, Austria . 2001 – 2006 MSc in Mining Engineering. University of Leoben, Austria

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Mining Optimization Laboratory (MOL), University of ...

2021-6-17 · Thesis: Open Pit Mine Loading and Haulage Simulation Supervisor: Dr. Askari-----Saha Malaki MSc (2014 /09 To 2016/09, Mining Engineering) University of Alberta, Edmonton, Canada BSc (2008-2012, Industrial Engineering) K.N. Toosi University of Technology, Tehran, Iran. Thesis: Footprint optimization for block caving mines under uncertainty condition

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(PDF) Underground mining Methods

Caving (i.e., 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.

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Technical Report on Underground Hard-Rock Mining ...

2013-3-15 · mining, using large-scale methods like block caving and room-and-pillar mining creates large areas of hydrologic and subsidence related impacts. Most studies of subsidence and hydrology impacts and their associated environmental effects have been done on …

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Characterisation of block cave mining secondary ...

Abstract. Block cave mining is a widely employed mining method around the world due to its low operating cost. One of the key factors that affects block caving mine''s productivity is fragmentation; accordingly, significant efforts have been made and are currently being made to study fragmentation processes, including the use of numerical modelling and remote sensing techniques.

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Characterisation of primary copper ore for block caving at ...

A mine scale finite element numerical model was also built to assess the stress state around excavations during caving propagation. Damage orientation determination by seismic focal solutions was used to correlate against collected structural data to investigate the influence of weak discontinuities during block caving performance.

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THE UNIVERSITY OF QUEENSLAND Bachelor of …

2019-10-14 · Development blasting operations in Sub-level and block caving mines play a significant role in the mine development cost and efficiency. Development at Ernest Henry mine accounts for a significant portion of the mine budget with the possibility of potential savings by the optimisation of the blasting and implementation practices.

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"Numerical modelling of mining subsidence, upsidence and ...

Ground subsidence due to mining has been the subject of intensive research for several decades, and it remains to be an important topic confronting the mining industry today. In the Southern Coalfield of New South Wales, Australia, there is particular concern about subsidence impacts on incised river valleys – valley closure, upsidence, and the resulting localised loss of surface water under ...

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Evaluation of intensive preconditioning in block and panel ...

2017-4-28 · (2017). Evaluation of intensive preconditioning in block and panel caving – part II, quantifying the effect on seismicity and draw rates. Mining Technology: Vol. 126, No. 4, pp. 221-239.

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(PDF) Open pit or block caving? A numerical ranking method ...

A switch from open pit mining to block caving mining could be another great development in this century. However, even though an increasing number of mines are being developed using block caving ...

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Fidelis SUORINENI | Managing Director | PhD, MSc, BSc ...

Block caving is an underground mining method for the profitable extraction of massive, low-grade orebodies. Lately, it has become the mining method of choice, for many mining companies, because of ...

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LONG TERM PLANNING OF BLOCK CAVING …

2020-7-24 · LONG TERM PLANNING OF BLOCK CAVING OPERATIONS USING MATHEMATICAL PROGRAMMING TOOLS By ENRIQUE RUBIO B. Sc., Universidad de Chile, 1998 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE STUDIES Department of Mining and …

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Phd Thesis: Numerical modelling of surface subsidence ...

2014-5-16 · Phd Thesis: Numerical modelling of surface subsidence associated with block caving mining using FEM/DEM modelling approach 1. NUMERICAL MODELLING OF SURFACE SUBSIDENCE ASSOCIATED WITH BLOCK CAVE MINING USING A FINITE ELEMENT / DISCRETE ELEMENT APPROACH by Alexander Vyazmensky Master of Applied Science, University of British Columbia, 2005 THESIS …

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Using numerical modelling to represent parameters ...

King, RU 1945, ''A study of geologic structure at Climax in relation to mining and block caving'', Transactions of the American Institute of Mining and Metallurgical Engineers, vol. 163, pp. 145 ...

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LONG TERM PLANNING OF BLOCK CAVING OPERATIONS …

2020-7-24 · LONG TERM PLANNING OF BLOCK CAVING OPERATIONS USING MATHEMATICAL PROGRAMMING TOOLS By ENRIQUE RUBIO B. Sc., Universidad de Chile, 1998 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE STUDIES Department of Mining and …

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The design and development of CaveCad: A state of the art ...

The block caving mining method is being increasingly applied as a mass mining method used to exploit base metals and diamond resources. In block cave mining, geotechnical monitoring is fundamental to the successful management and operation of the mine.

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sublevel caving mining method in Azerbaijan, East Iran

Characterisation of block cave mining secondary ...

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Numerical modelling of mining subsidence, upsidence …

2020-10-13 · Thesis Certification i. THESIS CERTIFICATION . I, Walter Keilich, declare that this thesis, submitted in fulfilment of the requirements for the award of Doctor of Philosophy, in the School of Civil, Mining and Environmental Engineering, University of Wollongong, is wholly my own work unless otherwise referenced or acknowledged below.

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INOVASI SISTEM PENYANGGAAN DI TAMBANG BAWAH ...

2021-7-21 · Block Caving. Tambang DMLZ berada di dalam satu bagian badan bijih dengan area tambang GBT 1 & 2, IOZ, dan DOZ, lokasinya terletak pada sistem deposit East Ertsberg Skarn Sistem (EESS) (Gambar 1), dimana terletak 410m dibawah tambang

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Paper: Major hazards associated with cave mining: are they ...

Cuello, D & Newcombe, G 2018, ''Key geotechnical knowledge and practical mine planning guidelines in deep, high-stress, hard rock conditions for block and panel cave mining'', in Y Potvin & J Jakubec (eds), Proceedings of the Fourth International Symposium on Block and Sublevel Caving…

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