block caving and primary crushing

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Block Caving - groundtruthtrekking.org

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 undercut, creating an artificial cavern that fills with its own rubble as it collapses.

OZ Minerals eyes up block cave opportunities at ...

The Carrapateena block cave builds on modern block caving experience, and aims to deliver an automated, electrified, data-driven mine with technology embedded in the design." The conversion to block cave operations enables a series of future add-on block caves, all of which were considered in the Life of Province scoping study, Cole added.

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 ...

Garnet Sand Crusher Machine - Gravel And Sand Making ...

Garnet crusher is also called garnet crushing machine. As the garnet's application in industry you should use our garnet crusher and garnet grinding mill. When you get the primary stone of garnet, it is always in different types of big block, so the garnet need …

Caving Underground Mining Methods (longwall, Sublevel ...

Caving Underground Mining Methods (longwall, Sublevel caving, & Block caving) 1. This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

ORE - Ikata

Block Caving 300 – 2,000 10,000 – 100,000 4 to 7 ... CAVEABILITY PRIMARY FRAGMENTATION DRAW POINT/DRAW ZONE SPACING Rock mass strength ... Range in fragmentation – fine crushing Draw control program Secondary fragmentation Draw method Draw point size Gravity grizzly aperture

Influence of rock mass veining and non-persistent joints ...

Keywords: block caving, secondary fragmentation, laboratory testing, block veining ... (ii) primary fragmentation, arising from stress-induced fractures propagating in the cave back, and (iii) secondary fragmentation, which first involves rockfall impact onto the ... (crushing, shearing, etc.) requiring higher stress magnitudes, resulting ...

Portable Rock Crushers

The latter include caving mines, whatever the caving mechanism (block caving, sub-level caving, etc.), and other generally vertical mine plans such as open stope, shrinkage stoping, cut and fill, etc. . For purposes of this study, these mines are collectively characterized by gravity delivery of ore to a stationary or nearly stationary, draw ...

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

Numerical modeling of influence parameters in cavabililty ...

1. Introduction. Block caving is a method that is completely based on the principles of caving. This method is based on the assumption that ore fractures and breaks by itself, due to the presence of internal stresses and forces caused by the weight of the ore body and also the downward movement of the broken rocks. 1 The deposit is divided into large blocks, usually square in shape.

GEM 230 5 AND 6 Flashcards | Quizlet

block caving. underground mining that involves building a concrete-lined tunnel under an ore deposit, then collection the ore through openings in the liner. ... primary crushing. reduction of newly mined ore to a manageable size. scrubber. an apparatus that washes away dirt and day from diamond bearing ore. dense media separation. a recovery ...

NGEx Reports Positive PEA for Los Helados Block Cave | E & MJ

The proposed project would utilize block caving mining methods. The PEA considers both a 65,000-mt/d scenario and a 130,000-mt/d scenario. In both cases, the cave has a single lift and the main mine access is through a 4.3-km decline. Both options have 1,000-m-long main intake and exhaust ventilation shafts (total of four shafts).

A Comminution Model for Secondary Fragmentation Assessment ...

The most widely used tools for assessing primary and secondary fragmentations in Block Caving operations is the Block Cave Fragmentation (BCF) software (Esterhuizen 2005). BCF was specifically developed to generate rock size distribution using input data as: primary fragmentation outcomes, aspect ratio of blocks, block strength, cave pressure ...

BLOCK_CAVING_METHOD.pptx - BLOCK CAVING Underground …

Block Caving is the mining method in which masses, panels, or blocks of ore are undercut to induce caving, permitting the broken ore to be drawn off below. If the deposit is overlain by capping or bounded by a hanging wall, it caves too, breaking into the void created by drawing the ore. This method is unlike sublevel caving, in that both the ...

Mining Methods VS Underground Crusher Location

Sublevel Caving. Although a caving method, fragmentation control for this plan is intended to be by blasting. Occasional muck still tends to be quite large, as in many block caves, but production sites are far fewer, they are multi-level, and continually moving, hence the popularity of versatile LHD equipment for "face" haulage.

stone crusher machine of mine company

Stone Crusher Machine Stone crusher is widely used in the world market mining industry nowadays, for primary crushing of hard rocks and block materials. The large and Henan Hongke Heavy Machinery Co., Ltd. Henan, China ISO 9001. get price. Crusher,Vibrating Screen,Mining Equipment .

(PDF) An Introduction to Block and Panel Caving | JOSE ...

An Introduction to Block and Panel Caving. An In tro d u ctio n to Blo ck an d Pan e l Cavin g Allan Moss, General manager Rio Tinto Copper Projects f Agenda Context – why the interest in caving How block caving works and key technical considerations Risks Value drivers 1 March 2011 BMO Capital Markets 2011 Global Metals & Mining Conference 2 ...

block caving and primary crushing - bazantlubin.pl

Block Caving And Primary Crushing . Block Caving And Primary Crushing napiraeu. block caving crushing plant annapurnaenterprise block caving and primary crushing manufacturer in designing crushing plant in philippines grinding mill china stone crusher design philippines is the most . Get Price; pros and cons of underground crushing

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 ...

(PDF) A Comminution Model for Secondary Fragmentation ...

Block caving is a complex method ruled by the dynamics of caving and the breakage of the rock mass towards the surface due to ore extraction. Conventional block caving operations have been ...

Stoping Mining Methods

7. Caving (ore broken by induced caving). (a) Block caving; including caving to main levels and caving to chutes or branched raises. (b) Sublevel caving. 8. Top slicing (mining under a mat that, together with caved capping, follows the mining downward in successive stages). D. Combinations of supported and caved stopes.

Ridgeway Gold and Copper Mine, New South Wales - Mining ...

The project also involved construction of an additional secondary crushing and regrind circuit. The mine commenced full production from the block cave beneath the existing mine, Ridgeway Deeps will be producing about 1.6 million ounces (Moz) of gold and 0.21 …

Underground Crushing Vs Surface Crushing

underground crushing plant... the design of primary crushing plants faces more limitations compared to surface … Underground mine crusher plant design ... Underground Crushing and Conveying ... Read more. tools and equipment used for crushing and brusting concrete.

Centerra Gold

Following extraction from the KUG cave and primary crushing underground, ore will be conveyed to the existing KS process plant where it will be processed at an average rate of 25,000 t/d (9.0Mt per year) using existing grinding, flotation, thickening and concentrate handling facilities. ... that panel caving differs from block caving in that ...

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 approxi-mately 40 % of the Chilean national copper production comes from block caving mines (El Teniente, Andina, and El Salvador, and in the near future, Chuquicamata). As a

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22. The technique of primary drilling and blasting is an effective way to solve the problem of crushing, caving and transportation. 。 23.

The Block Cave Mining Method - UKEssays.com

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 ...

Block Caving Archives - Cave Mining Forum

Mass mining including block caving, incline caving, front caving, sub-level caving and sub-level retreat are the principal mining methods for primary diamond deposits worldwide. Diamonds have only been mined on an industrial scale within the past 150 years, mainly as open pit mines.

autocad block mobile crusher

Block Caving And Primary Crushing Vibrating Screen Design ... mine related information mining crushers mainly include jaw crusher cone crusher impact crusher mobile crusher for crushing stone crusher block suggestions minecraft 2011 11 28 so my suggestion is a crusher block but not the kind that destroys blocks its more related to the furnace ...

thyssenkrupp extends gyratory crusher winning streak ...

The company finished off 2019 by winning a contract to supply a new primary jaw gyratory crusher for the Roy Hill iron ore mine in the Pilbara, Western Australia. ... Block caving …

(PDF) Influence of block strength and veining on secondary ...

In block caving projects, the rock mass fragmentation process plays a controlling role in the design and success of the operation. Poorly understood, however, is the secondary fragmentation that ...

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 mining. The technique is commonly used to extract low grade copper, copper-gold, iron and molybdenum ...

mining crushing and grinding of copper from chalcopyrite

Yauricocha is an underground polymetallic mine using the sublevel block caving .... treats ore produced by the Yauricocha Mine using crushing, grinding and flotation. The ores are complex, carrying zinc, lead, copper, silver and gold values. Read more

thyssenkrupp and Northparkes collaborate on latest ...

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".

A new cavability index in block caving mines using fuzzy ...

Block caving is commonly used in the large-scale extraction of metals and minerals situated in thick ore beds in a steep or vertical rock mass. Cavability is defined as a continuous failure of the rock mass until all void space is filled with broken rock. Once draw continues, failure in the cave back continues to propagate . The cavability of ...

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 …