experience with sublevel caving ore

Sublevel Caving - 911 Metallurgist

Mar 03, 2017· Experience from LKAB, Sweden - Sub-level caving (SLC) is an important mass mining method, used at LKAB. The caved rock or debris at the SLC interface reduces the fragmentation and the swelling of the blasted ring and it dissipates the explosive energy. These phenomena may immobilize the blasted ring, causing ore losses.

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Research on the shape of caved ore in sublevel caving ...

【Abstract】 <>This paper emphasizes the importance of studying the shape of caved ore in sublevel caving mining under the effect of blasting force.Through the blast testing with models made from cement-sand slurry,the shape and particle size distribution of caved ore were found out.The paper primarily analyzes the formation causes of the shape of cared ore in sublevel caving and points ...

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Sublevel caving - ScienceDirect

1. Diagrammatic plan of sublevel caving in Kiruna: l--drifting; 2--ring drilling (roof of slice); 3---charging of explosive; 4--ore loading. so-called Tunnler 200 (Fig. 2) with from 1 to 3 drills on a chain-feed cradle and in larger headings drill rigs with hydraulically operated feed cradles may be used.

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Major Mines & Projects | Telfer Operation

Underground sub level cave mining ore and Western Flanks bulk open stope ore is hoisted to the surface via a shaft. Open pit mining has continued at both Main Dome and West Dome open pits (including stockpile reclaim). Since 31 December 2019, the Mineral Resources and Ore Reserves were depleted by 0.2 million ounces of gold and 0.01 million ...

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Inside block caving: the deep mining method of the future ...

The role of block caving Although the caving mining system was initially used for shallow orebodies, it has recently been applied at depths of 2km underground. According to Suorineni, "caving heights have also increased drastically from about 200m to 500m", creating so-called 'super caves'."There is insufficient experience caving in these environments," he adds, which is a ...

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Cost Of Mining Equipment For Sub Level Caving Mining

Sub- level caving engineered to perform1.75 . ore-graDe control 67 Sub-level caving engineered to perform Simon Steffen of Elexon Mining discusses methods for optimising production at modern sublevel caves while maximising ore grades and recovery ub- level caving is a highly efficient top-down underground bulk mining method

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v117n4a6 Modelling of caving and deformation mechanisms …

mining company. Iron ore is extracted by large-scale sublevel caving. The mine comprises a total of 20 orebodies, about 10 of which are in production today (Figure 1). The mine is located in the municipality of Gällivare, about 100 km north of the Arctic Circle (Figure 2). Successful sublevel caving requires progressive caving of the orebody ...

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15. Longwall and caving mining methods

15.4 Sublevel caving 15.4.1 Gravity flow of caved ore-Flow of caved ore cannot be described satisfactorily by theories for the flow of granular materials because the particle size, discharge rates, boundary conditions, feature of progressive breakdown of broken ores, and degree of fragmentation of ore.

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3D mapping of sublevel caving (SLC) blast rings and ore ...

Sublevel caving (SLC) is a highly productive mining method with the major disadvantages of irrepressible ore loss and dilution. The confined blasting situation of SLC rings is commonly regarded to have a significant impact upon the material flow characteristics and hence on the overall performance.

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Cave mining 2040: advancing cave mining to meet future ...

Jun 15, 2018· 7. Sublevel caving. Sublevel caving is a method often evaluated in parallel with block and/or panel caving options. It requires multiple levels of development and ongoing ring blasting for production. Sublevel caving allows for a more selective extraction but typically achieves lower production rates than block and panel caving methods.

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Numerical Experimental Study on Ore Dilution in Sublevel ...

Oct 21, 2020· 10%· Sublevel caving is a large-scale underground mining method, which has been widely used in the world since the beginning of twentieth century. This is a top-down mining method that relies on blasting to break the ore and gravity to transport the ore [1, 2].Ore drawing management is to draw ore according to the prescribed discharge tonnage or grade.

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Sub Level Caving - PHDessay.com

Mar 03, 2017· Experience from LKAB, Sweden - Sub-level caving (SLC) is an important mass mining method, used at LKAB. The caved rock or debris at the SLC interface reduces the fragmentation and the swelling of the blasted ring and it dissipates the explosive energy. These phenomena may immobilize the blasted ring, causing ore losses.

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SUBLEVEL CAVING TECHNIQUE by Partha D Sharma -

Jun 25, 2010· Sublevel caving is usually carried out when mining of the orebody through an open pit method is no longer economically feasible. Mining now proceeds underground, underneath the …

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e perience with sublevel caving ore

Sublevel caving (SLC) is a mass mining method based upon the utilisation of gravity flow of blasted ore and caved waste rock [1]. The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves under the action of mine-induced stresses and gravity [2].

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Using ore recovery monitoring with mine reconciliation to ...

Mar 10, 2014· The introduction of Smart Markers has been a game changer to enabled mines to efficiently monitor ore recovery with minimal production impact and fast results. The Reconciliation process and ore recovery monitoring are complementary methods focussed on optimising the sublevel caving system to the local geological and geotechnical conditions.

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Advances in AMC's Numerical Modelling Capabilities – AMC ...

Lack of modelling expertise and experience. ... Figure 3 Surface subsidence induced due to a) sublevel caving operation, and b) underground stoping underneath a mountainous surface topography ... Figure 5 Visualization of non-extracted ore grades after completion of sub-level caving operation (material flow modelling) Stope Stability Assessment.

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Method of ore deposits mining by sublevel caving

There is a method of development of ore deposits sublevel caving under the patent of the Russian Federation No. 2208162, AS 41/22, publ. in BI No. 19, 2003, including on the horizons of the release openings: drifts, vectors and vent itself, carrying potatah drilling workings and the breaking of ore panels wells with formation of a temporary ...

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14 December 2018 Sublevel Caving success at Syama

Sublevel caving will continue at the 1105 level and additional production areas will be established on the 1130 and 1080 sublevels. Ore production is expected to …

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Gravity flow of broken rock in sublevel caving (SLC ...

1 SUBLEVEL CAVING (SLC) 1.1 Basic considerations Sublevel caving is a mass mining method based upon the utilization of gravity flow of blasted ore and caved waste rock (Kvapil, 1998). It relies on the principle that ore is fragmented by blasting while the overlying host rock fractures and caves under the action of mine induced stresses and

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Numerical Experimental Study on Ore Dilution in Sublevel ...

Keywords Ore dilution . Percolation rate . Numerical simulation . Sublevel caving 1 Introduction Sublevel caving is a large-scale underground mining method, which has been widely used in the world since the beginning of twentieth century. This is a top-down mining method that relies on blasting to break the ore and gravity to transport the ore ...

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Australian Centre for Geomechanics | Conference Paper ...

Electronic cave markers were used to measure recovery over multiple sublevels and the extraction zone evolution in real time. Fragmentation was measured during loading since the size of the fragmented rock is known to affect gravity flow behaviour and ore recovery in sublevel cave mines.

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- Sublevel Caving Mining Method - YouTube

Black Diamond Drilling Services AustraliaDatabase

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Sublevel caving - QueensMineDesignWiki

Sublevel Caving is one of the most advanced mining methods. This method is usually undertaken when mining the orebody through an open pit is no longer economically viable. In Sublevel Caving, mining starts at the top of the orebody and develops downwards. Ore is mined from sublevels spaced at regular intervals throughout the deposit.

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Sublevel Caving Flashcards | Quizlet

- each sublevel is developed into drifts that penetrate complete ore section - spiral ramp connects sublevels - in narrow deposits, drifts parallel to strike - ore section above drifts is drilled with long holed fan pattern - drilling is done ahead of blasting - several sublevels can be drilled completely before blasting/production

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"Raise Caving" – Cheaper and more flexible mining at great ...

May 31, 2021· Block caving and sublevel caving have in common that rock mass caves during the extraction of the ore body in a controlled way. As a result regional stress changes, the formation of considerable abutment stresses, large-scale subsidence and significant seismic energy releases occur.

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Pillarless sublevel caving method based vertical ...

The present invention discloses a method for non-technical measures the gently inclined ore mining conditions pillar sublevel caving method method which "vertical partitioning ore, in combination, and a disk replenish residual caving full coverage" by the other, to solve SUBLEVEL the sublevel caving ore under conditions effective gently inclined segment mining ore triangular vertical plate ...

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An assessment of dilution in sublevel caving at Kazansi ...

The ore block above each sublevel drive is ... Some engineers estimate the dilution level in sublevel caving based on experience at mines with similar orebody characteristics. The difficulty in

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A new mine planning tool for sublevel caving mines

A new mine planning tool for sublevel caving mines D. Villa and T. Diering 238 Caving 2010, Perth, Australia 2 Principles of PCSLC The PCSLC development tool is being done in conjunction with SRK Consulting enabling Gemcom to take advantage of the considerable SLC experience gained by SRK over the years. This experience is proving

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