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Major Mines & Projects | KSM Project

PRIMARY CRUSHING There will be five primary crushing sites throughout the plant operation life at the Mitchell, Kerr, and Sulphurets sites, as well as in the underground block caving mines. At the Mitchell OPC site, primary crushing will mainly consist of two 60 inch by 89 inch gyratory crushers, two apron feeders, and one train load surge bin ...

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thyssenkrupp and Northparkes collaborate on latest ...

Aug 02, 2019· Northparkes was the first mine to use the standard indirect fed Jaw Gyratory crusher type BK 63-75 for its newly developed block caving mine concept, thyssenkrupp said, with this primary crusher design becoming the "state of the art solution for block caving mines".

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Prediction of Fragmentation in Block Cave Mine Design ...

The Core2Frag program was developed to predict primary fragmentation for block caves using ... production capability of a deposit designed for extraction using the block caving method. Fragmentation ... Rounding of block corners and crushing Veining and micro-fractures within blocks

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Block caving with Rio and NCM

Block caving with Rio and NCM COMPANY VISIT Opportunities for those with the skill base ... Primary crushing capacity runs at 10mtpa and the concentrator has theoretical capacity of 7.2mpta. The shafts can go to 9mtpa with minimal capex. The ball mill is a genuine bottleneck but possible expansion of copper in concentrate output is tied up in a ...

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The Block Cave Mining Method - UKEssays.com

BLOCK ANd pANeL CAVING Block caving is an underground mining method that uses gravity to exploit massive, steeply dipping orebodies located at depth, particularly those with disseminated mineralisation or that are low-grade in nature, but too deep to be extracted using open pit methods. Block caving also depends on insitu stresses and

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Block caving - QueensMineDesignWiki

Block caving with Rio and NCM COMPANY VISIT Opportunities for those with the skill base ... Primary crushing capacity runs at 10mtpa and the concentrator has theoretical capacity of 7.2mpta. The shafts can go to 9mtpa with minimal capex. The ball mill is a genuine bottleneck but possible expansion of copper in concentrate output is tied up in a ...

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The Block Cave Mining Method - UKEssays.com

Jun 20, 2018· 1.1 Block Caving. Block caving is an underground mining method applicable to the extraction of low-grade, massive ore bodies with the following characteristics: large vertical and horizontal dimensions, a rock mass that will break into pieces of manageable size, and. a surface that is allowed to subside. These rather unique conditions limit ...

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Block Caving: Mining Specialization | E & MJ

The current concept involves a 7.5-km-long access decline leading to four production levels, with block caving being used to produce 140,000 mt/d of ore. And in the U.S., the possibility of mining below the existing Bingham Canyon pit raises the prospect of extending the mine's life beyond 2050.

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Block caving - QueensMineDesignWiki

Block caving. Block caving is an underground mining method that uses gravity to exploit massive, steeply dipping ore bodies located at depth. These ore bodies are generally low grade in nature and are too deep to be extracted through open pit …

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Design & Operating Principles in Caving Methods

Block Caving Design parameters (Laubscher, 2001) 41 Production Requirmnts Cavability Primary Fragment. Drift spacing Drawpoint interaction Draw zone spacing/pillar Drilling & blasting Hauling Crushing Layout Logistics Excavation stability Method of Draw Draw heights Sequence – rate of draw

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Block Caving Crushing Plant

Ock Caving Crushing Plant baoli-forklifts.co.za. Block Caving And Primary Crushing cesareavanzi. Block Caving And Primary Crushing: Block caving is used to mine massive steeply dipping orebodies second ROM pad and primary crushing 2 is only for the future expansion past 22Mtpa.Ore undergoes primary crushing at 2012 Block c.

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12. Mining methods and method selection

difficult: block caving is generally preferred due to low labor requirement, and low cost per tonne.-Basic prerequisites to applying block caving method are that caving can be initiated in the orebody, and that it will propagate steadily through the orebody.

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Underground hard-rock mining - Wikipedia

Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead.It also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer minerals, such as salt ...

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THE STORY OF THE BAGDAD MINE

By early 1945, block caving had proved only partly successful. Labor was in short supply. The ore-body was relatively thin for block-caving and so requir­ ed a high ratio of development work per ~ep of ore. Then it was that Manager Dickie made the decision which made Bagdad a …

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Block Caving - groundtruthtrekking.org

Block Caving and Pebble Mine Block caving has been proposed for a section of the proposed Pebble Mine in southern Alaska to excavate a portion of one of the world's largest gold, copper, and molybdenum deposits. Part of the Pebble deposit is buried roughly 1,000 to 7,000 feet underground.

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Modelling of primary fragmentation in block caving mines ...

Modelling of primary fragmentation in block caving mines using a finite-element based fracture mechanics approach A. Paluszny . R. W. Zimmerman Received: 17 November 2016/Accepted: 28 December 2016/Published online: 24 April 2017 The Author(s) 2017. This article is an open access publication Abstract The growth of fractures around an under-

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BLOCK_CAVING_METHOD.pptx - BLOCK CAVING Underground …

VARIATIONS In block caving, one of the critical parameters that determine success is the size and shape of the area that is caved. Three methods are used: block, panel, that is caved. Three methods are used: block, panel, and mass. In block caving, regular rectangular or square areas are undercut in a checkerboard pattern. Usually, these blocks are mined in an alternating or diagonal order to ...

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Major Mines & Projects | Grasberg Block Cave Mine

The Grasberg Block Cave fleet consists of approximately 460 pieces of mobile equipment. The primary mining equipment directly associated with production and development includes an available fleet of 52 LHD units and 35 haul trucks. Each production LHD unit typically carries approximately 11 metric tons of ore and transfer ore into 55 to 60 ...

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Block Caving Instead of Open - LTU

Primary fragmentation: In situ block size Secondary: • Extension of pre-existing discontinuities • Opening of filled and healed discontinuities • Opening along bedding or schistocity planes • Crushing under superimposed weight • Failure of blocks under arching stress • Abrasion of block corners

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