sub level mining process

Sublevel Caving Mining Method - Newtrax Technologies Inc.

Sublevel Caving Method suitable for large ore bodies with a steep dip, waste rock and ore will fracture under controlled conditions.

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Sublevel Caving Mining Method - YouTube

May 18, 2016 ... Sublevel caving is a large scale mining method suitable for large orebodies with a steep dip and a rock mass where the host rock in the hanging wall will fra...

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Sublevel Stoping Mining Method - YouTube

Sep 20, 2017 ... The sublevel stoping mining method is commonly used in large scale mining. It is a versatile and productive method that is primarily used for large orebodies...

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Sublevel stoping..Underground mining methods - SlideShare

Oct 22, 2014 ... Considerations on the sublevel stoping method; Conditions for application of the deposit; Characteristic of Sublevel Stoping Method; Application; Development; …

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Sublevel caving - QueensMineDesignWiki

Jan 25, 2013 ... 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...

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sub-level open stoping: design of the o640, l651 and n659 sub-level ...

M.Eng (Mining Engineering). This dissertation will explore the process followed in the design of a sub-level open stope. (SLOS) by using examples of actual stopes scheduled to be in production between August. 2006 and February 2007. The main objective is to give the reader an understanding into sub-level open stoping...

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Sub-level open stoping - MineWiki, Queen's Mine Design Project Wiki

Apr 27, 2011 ... This method is usually considered as an alternate to sublevel caving when a lower dilution method is needed and where the rock is fairly competent. The production for a mine using sublevel stoping can range from 15- 40 tons/employee-shift, while one stope can produce greater than 25000 tons per month...

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Sublevel caving - QueensMineDesignWiki - MineWiki, Queen's Mine ...

Jan 25, 2013 ... 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...

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Definition of sublevel stoping - mindat.org glossary

i. In this mining method, the ore is excavated in open stopes, retreating from one end of the stope toward the other. The orebody is developed first by a series of sublevel drifts above the main haulage level. The sublevels are connected by a starting raise at one end of the stope and by a passageway raise for entrance to...

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Sublevel Stoping - RitchieWiki

Oct 26, 2012 ... Sublevel stoping is a method of underground mining method that involves vertical mining in a large, open stope that has been created inside an ore vein. Usually the stope operates as the center for production. In sublevel stoping, this is not the case. The stope is not meant to be occupied. Drilling, blasting...

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Types of Underground Mining Method Comparison - 911 Metallurgist

Fig. 4 is an illustration of the method, and shows half of the vein cut away where the stoping is being done. The miners go from the haulage level up the raise into the sublevels. On the first sublevel they will blast into the shape of funnels the raises that come up from the haulage level, and after...

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Topic - Sub Level Shrinkage Mining Method - Mining Weekly

... to new mining method. By: Henry Lazenby 6th August 2016 Primary palladium producer North American Palladium has narrowed its second-quarter loss to C$9.9-million, or C$0.17 a share, despite low metal prices and underground production challenges at its Lac des Iles (LDI) palladium mine, in north-western Ontario.

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Underground mining (hard rock) - Wikipedia

Declines are often started from the side of the high wall of an open cut mine when the ore body is of a payable grade sufficient to support an underground mining operation, but the strip ratio has become too great to support open cast extraction methods. They are also often built and maintained as an emergency safety...

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Diamond Mining

Economic factors. • Location. • Mining method. • Recovery. • Distribution and sales. Grade. How many diamonds? • Grade – carats per tonne. • Size distribution – coarseness. Can you recover them? • Process plant factors. • Sieve size cut-off (i.e., reject anything less than 1mm). • Recovery methods. (grease tables, X-ray, etc.).

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Failure of hanging roofs in sublevel caving by shock collision and ...

The mining method is sublevel caving with a sublevel height varying from 20 m to 30 m. The production blastholes are 115 mm in diameter, each hole contains one primer, the dirft is 7 m wide and 5.5 m high, the explosive is emulsion with a VOD (velocity of detonation) of 5000 m/s (Nordqvist and Wimmer, 2014), the delay...

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Evolution of sublevel caving – safety improvement through ...

... use in sublevel caving operations that significantly reduces the risk posed to mine workers. Sublevel cave (SLC) mining is breaking ore-bearing rock through blasting and drawing it out under the waste rock that is caving into the void created. SLC mines have the most intensive blasting process of all the mining methods,...

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The Effects of Pre-charging On Sub Level Cave Mining ... - UQ eSpace

A thorough literature review was conducted on academic research related to sublevel cave. (SLC) mining and all processes involved in the continued production of an SLC mine. In review of the research, it was highlighted that there was limited information regarding the impacts associated with sleep time of a pre-charged...

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Underground Mining Methods - Body

However, every mineral deposit, with its geology, grade, shape, and volume, is unique. As methods are described here, please bear in mind that rock is vari- able, miners have ideas, and the world of mines will always display special features. LAbandoned. Mined out level - backfilled i. Sublevel. Ore pass. Cage. Producing.

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fourth international symposium on block and sublevel ... - Caving 2018

Oct 18, 2017 ... The growing popularity of caving methods around the world is largely due to the very low production cost and the intrinsic safety associated with the mining approach. It is often the only viable mining method for some of the lower grade massive orebodies that are becoming too deep for open pit mining.

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LKAB - Mining

Ore is extracted from LKAB's underground mines by means of sub-level caving. This mining method is based on creating cavities in the orebody through drilling and blasting, and allowing the ore to fall down to underlying levels by means of gravity, from where it is transported onwards by train or loader. When the ore is...

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Just-in-time development model for a sub-level caving ... - SAIMM

the buffer mineral reserve levels that minimize funds 'locked up' in development while still providing customers with assurance of long- term product supply. The salient difference between the industrial and mining settings is that the EOQ is maintained through a certain process of placing and receiving orders in industry...

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Sublevel Stoping - WV Mine Safety

that the rock above and around the ore body be weak so that it will break into a fractured mass and the ore will fracture into small pieces. Sublevel caving. (figure 17) applies best to wide, vertically oriented, vein-type ore bodies (figure 18). This mining method entails a ramp and borehole from which sublevels, spaced 6 to 12...

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Draw Control Optimization along the Production Drift in Sublevel ...

Production Drift in Sublevel Caving Mines. 1. Luleå University of ... Draw control regulates loading process. Amount of material to be loaded. When to stop loading ... Research focus. Factors. Ore geometry and geology. Mine design and layout. Draw control. Optimization. Ore grade. Final extraction ratio. Parameters...

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numerical modelling of rock mass deformation in sublevel caving ...

surface once mining with new method commences. KEYWORDS: rock mass deformation, sub-level caving, numerical modelling, monitoring, Kvannevann mine determine subsidence independently of geodetic measurements. In this paper the measures undertaken to monitor effects of underground mining of an iron-ore...

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A study of gravity flow principles of sublevel caving method in ...

Abstract The loss and dilution of ore by sublevel caving mining method is influenced by gravity flow principles of caved granular materials (rocks). Gravity flow of broken rock (muck) in dipping narrow veins is complex. By com- bined use of dimensional analysis and similitude studies in physical modelling coupled with...

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Petra Diamonds | How are diamonds mined by Petra?

Cave mining (both block caving and sub-level caving), which is currently used at Petra's underground mines in South Africa is a well-established and safe mechanised mining method that was first introduced at Kimberley, South Africa in 1951. It is now used extensively as an underground mining method as it allows for the...

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Overhand Stoping - University of Saskatchewan

... standing on solid ore and below supported or filled back. • Overhand Stoping. – Stoping operation start a the bottom of the orebody and proceeds to upward. – Most popular method of stoping. Example: Shrinkage stoping, Cut and Fill stopes, Room and Pillar, Caving. Methods, VCR Method of Mining, Sub Level Stoping...

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Implementing a Production Schedule at LKAB's Kiruna Mine

LKAB's Kiruna Mine, located in northern Sweden, produces about 24 million tons of iron ore yearly using an underground mining method known as sublevel caving. To efficiently run the mills that process the iron ore, the mine must deliver planned quantities of three ore types. We used mixed-integer programming to...

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Major Mines & Projects | Sudbury Mine - Mining Industry Data

Mine Type, Open Pit / Underground. Commodities. Nickel; Copper; Cobalt; Platinum; Palladium; Gold; Silver. Mining Method. Cut & Fill; Mechanized Cut & Fill; Post Pillar Cut & Fill; Underhand Cut & Fill; Sub-level caving; Vertical block mining (VBM); Uppers Retreat. Processing. Flotation; Magnetic separation; Solvent...

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Alternative Process Flow for Underground Mining Operations - MDPI

Jun 30, 2016 ... The aim of this study is to evaluate a conceptual future haulage method at an existing underground sub-level caving mine by comparing different haulage equipment of various sizes operating from the production drifts to the crushers, enabling rock mass transportation without using ore passes. Discrete...

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What is the difference between sublevel stopping and sublevel ...

Mining starts at the top of the ore body and progresses downwards in a safe sequence. Sublevel Caving is a productive mining method where all of the ore is fragmented by blasting and the host rock in the hanging wall of the ore body caves. Once the production drifts have been excavated and reinforced, the opening rays...

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LKAB - Sub-level caving

The unique Wassara hammer was initially developed for sub level caving and can easily increase the length of blast holes way beyond 60 meters. ... fragmentation which increases the overall throughput of the whole mining process. This is particularly beneficial for large-scale mining methods such as sub-level caving.

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Block Caving Method of Mining | Block Caving - TechnoMine

For instance, Hoek (1974) developed an initial limit equilibrium model for the analysis of surface cracking associated with the progressive sub-level caving of an inclined orebody. Flores & Karzulovic (2004) summarised the most common analytical methods, failure modes and techniques currently available for block caving...

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Syama - Mali, West Africa - Resolute Mining

​It was determined that Sub Level Caving (SLC) represented the optimal mining method to develop the extensive sulphide orebody beneath the open pit – providing controlled, high-productivity ore delivery from the deposit. Furthermore, the Company's operating history at the owner-operated SLC at Mt Wright has provided...

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Incline caving as a massive mining method

Sublevel caving (SLC). > Block caving (BC). > Front caving (FC). As part of this study, Mr Robin Kear was requested to conduct an economic desktop study and it was from his report that the mining block height and peak production rates were determined (Murray et al., 2003). The main conclusions were as follows:.

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Integrated optimization of stope boundary selection and scheduling ...

The process of determining stope boundaries and scheduling is an example of an aspect of underground mining amenable to optimization (Topal and Sens, 2010). The current industry standard for medium- and long-term planning for sublevel stoping (SLS) is to exclusively determine stope outlines and then determine an...

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3.-Underground mining capital and operating costs

Table 1. Mine dilution and recovery factors. Mining method, Dilution, Recovery. factor, %, factor, %. Open pit, 5, 90. Block caving . . . . . . . . 15, 95. Cut-and-fill, 5, 85. Room-and-pillar . . . . . . 5, 185. Shrinkage, 10, 90. Sublevel longhole . . . . . 15, 85. Vertical crater retreat . . 10, 90. 'Assumes pillar extraction.

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ASX Announcement - Evolution Mining

Aug 24, 2016 ... Ernest Henry currently has an Ore Reserve base that supports a mine life of at least 11 years. Ernest Henry is a high quality Australian copper-gold asset which has a track record of stable, large scale, low cost production. The underground mining operation utilises the sub-level caving ore extraction method...

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Stope mine design optimisation using various algorithms for the ...

developed for optimising stope boundaries for sublevel stope mines. ..... higher efficiency and profitability in sublevel stope mining, optimisation algorithms need to .... 2-4 Mining Methods. In the Kibali project, a number of different mines have been planned including several open pit mines and one underground mine.

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Wireless Cave Mining Monitoring Systems - Elexon Mining

The Smart Marker System comprises of a collection of wireless, robust electronic markers that are embedded in the ore body of a block or sub-level cave mine to track ore flow. During the mining process the embedded Smart Markers exit the draw point and are detected by a Smart Marker Reader that is installed near the...

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