block caving and primary crushing

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Rock mass permeability used in the models Download Table

The relative calculation in this paper is carried out according to the primary , of the caving blocks are the main factors affecting the re-crushing and rearrangement of the caving blocks ....Know More

thyssenkrupp extends gyratory crusher winning streak ,

Feb 12, 2020 0183 32 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 has proven to be ....Know More

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...Know More

Stoping Mining Methods

Apr 03, 2017 0183 32 7 Caving ore broken by induced caving a Block caving including caving to main levels and caving to chutes or branched rais 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 stop...Know More

Numerical modeling of influence parameters in cavabililty ,

May 01, 2018 0183 32 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 ,...Know More

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...Know More

2 Types of Concrete Crushers

Aug 01, 2019 0183 32 Abandoned concrete blocks are high-quality concrete aggregates which have many advantag For example, after the buildings are dismantled, the high-quality concrete blocks and silt after crushing and screening can be used as recycled coarse and fine aggregates for concrete The fine powder can be directly used as the raw material of cement...Know More

Discussion on Induced Caving and Block Caving

Abstract 30 60 energy consumption was caused by rock fragmentation in underground mining of metal mine,the rock fragmentation with underground pressure induced has been becoming research emphasis in miningThe induced caving and block caving were the typical methods of the induced broken rock The development status and technological characteristic ,...Know More

Block Caving Mining Specialization E MJ

The current concept involves a 75-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 US, the possibility of mining below the existing Bingham Canyon pit raises the prospect of ,...Know More

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 min 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 ....Know More

PDF Underground mining Methods

Caving ie, 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...Know More

Geotechnical factors

A schematic of block caving is shown in Figure 3 This method is distinct from all others discussed thus far as the primary fragmentation is achieved by natural mechanical process Block caving is a mass mining method, capable of high, sustained production rates at relatively low cost per tonne...Know More

The Block Cave Mining Method

11 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 ....Know More

The Block Cave Mining Method

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 72mpta 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 ....Know More

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 43-km decline Both options have 1,000-m-long main intake and exhaust ventilation shafts total of four shafts...Know More

Copper Flotation

May 16, 2016 0183 32 However, there are a few underground mines using block caving methods CRUSHING COPPER ORE The crushing section consists of two or three crushing stages with the second or third stages in either closed or open circuit with vibrating screens Generally, size of the primary crusher is not determined by capacity but by the basic size of the mine ....Know More

Block Caving Archives

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 min...Know More

432 Underground Mining Methods ABC 123 Testing Site ,

Caving methods Caving methods include block caving, sublevel caving, and longwall miningFor emphasis, allow me to repeat what I said earlier caving methods are used in settings where the ore or the host rock is so weak that it cannot support its own weight for any period of time the methods only work if the rock or the ore will readily cave under its own weight...Know More

Estimates of Electricity Requirements for the Recovery of ,

Estimated electricity requirements for production of ore from a multi-million t/yr block-caving operation with an underground cone crusher and a 10-mile conveyor belt to the beneficiation , products from primary and secondary feedstock by electrowinning in chloride and sulfate...Know More

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 ....Know More

Blast Optimization and Ore Fragmentation Modeling

Sep 19, 2018 0183 32 Block caving on the other hand often results in large amounts of boulders, since blasting of the rock is normally not used , Cost savings in ore benefiction, especially primary crushing Elimination of primary crushing before conveyor- and skiphoisting systems, if fragmentation is very fine...Know More

15 Longwall and caving mining methods

Block caving t r-k 152 Longwall mining in hard rock , crushing as destructive as the fault-slip in an operating stope 152 Longwallmining in hard rock , -Primary object of mining design is to achieve pseudo-continuous deformation of the main upper strata overlying the seam...Know More

A Comminution Model for Secondary Fragmentation Assessment ,

Jul 03, 2017 0183 32 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 ....Know More

Major Mines Projects Chuquicamata Mine

The ore will be extraced through an extensive block caving operation, by installing four production levels 140000 tons of ore will be mined and treated per day, making Chuquicamata one of the largest mining operations on the globe The new mine design for PMCHS is based on the following mine production process 1...Know More

Portable Rock Crushers

Dec 16, 2020 0183 32 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 ....Know More

Caving Underground Mining Methods longwall, Sublevel ,

Oct 23, 2014 0183 32 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...Know More

Geostatistical Evaluation of Fracture Frequency and Crushing

Final paper in Proceedings of the Third International Symposium on Block and Sublevel Caving, Raul Castro editor, Universidad de Chile, 5-6 June 2014 Fig 2 Two samples a Few crushing and fractures b Important crushing, numerous fractures Fig 2a presents a drill core where the crush length is only 11 cm with just one fracture in the non...Know More

Productivity of a Continuous Mining System for Block ,

Oct 12, 2016 0183 32 Block caving mining is one of the most cost-effective underground mining methods , and a primary crusher Early crushing of the mineral was introduced to avoid grizzlies on ore passes and to allow proper operation on conveyors belts Each feeder extracts ore from the draw points, which feeds the conveyor equipped with a primary crusher ....Know More

Underground hard

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 leadIt also involves the same techniques used to excavate ores of gems, such as diamonds and rubi Soft-rock mining refers to the excavation of softer minerals, ,...Know More

block caving and primary crushing

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...Know More