Design of a new layout for sublevel caving at depth

LKAB has been mining iron ore with the sublevel caving mining method in northern Sweden for more than 60 years. Throughout the years, LKAB has improved this mining method to stay competitive in a tough international iron ore market. Improvements in drilling and blasting technology have helped LKAB increase the scale of sublevel caving and therefore decrease its mining costs in development. Today, sublevels

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

2017-10-25  Conventional sublevel caving (SLC) is often applied to large orebodies [ 1] but can be applied to orebodies between 2.5 and 10 m in width. SLC mining cost is relatively lower than cut-and-fill and shrinkage methods as well as resuing. In SLC mining the hangingwall should cave with the orebody on blasting and often result in surface subsidence.

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Parameters influencing full scale sublevel caving material ...

When applying sub-level caving method to the mining of steeply dipping narrow veins (particularly stock worked narrow veins with poorly defined host rock contacts), the flow of ore can be assumed...

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Ridgeway Gold and Copper Mine, New South Wales -

2021-8-12  The transformation of Ridgeway Underground – a sub-level caving operation – into a block cave involved a mine design and a process to ensure the rock ‘naturally’ caves progressively upwards by a gravitational force of the undercutting and removal

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Characterizing Caving Induced Seismicity at Ridgeway

Sublevel caving was initiated at the Ridgeway Gold mine in May 2000. A seismic system was used to monitor the progression of the cave. Several thousand seismic events were recorded as caving ...

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Parameters influencing full scale sublevel caving material ...

2010-6-1  Sublevel caving (SLC) is a mass mining method based upon the utilisation of gravity flow of blasted ore and caved waste rock. The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves

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Sublevel Caving - Oraee

2016-9-19  Sublevel caving is a systematic method and uses regular layouts and working procedures. Development, production drilling and loading are carried out on separate levels, all independent of each other. Also, a number of faces are always available for production.

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Solving the Problems of Precharging Sublevel Caving

Ridgeway Gold Mine (RGM) is an underground sublevel caving (SLC) operation that is owned and managed by Newcrest Mining Limited (NML). Production drill and blast practices are critical to the success of the SLC method at RGM. SLC production ring precharging was introduced in November 2001 to enhance these practices and deliver safety, productivity and cost improvements.

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Parameters influencing full scale sublevel caving material ...

The analysis of the block caving-induced failure of the large open pit slopes of the Palabora mine using FEM, DEM, and FDM, respectively, has been described. 22,38,39 A huge goaf will be formed ...

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Characterizing Caving Induced Seismicity at Ridgeway

Sublevel caving was initiated at the Ridgeway Gold mine in May 2000. A seismic system was used to monitor the progression of the cave. Several thousand seismic events were recorded as caving ...

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Key geotechnical knowledge and practical mine planning ...

of the Ridgeway sublevel cave. The success of that mine led to a significant expansion into block caving operations, first at Ridgeway Deeps, and then to the now established Cadia East operations. What makes Cadia unique is the high-stress, hard rock mining conditions combined with the ability to

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Paper: Key geotechnical knowledge and practical mine ...

Abstract: Cadia Valley Operations (Cadia) embarked on a path of cave mining in the early 2000s with the establishment of the Ridgeway sublevel cave. The success of that mine led to a significant expansion into block caving operations, first at Ridgeway Deeps,

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Ridgeway Gold and Copper Mine, New South Wales -

2021-8-12  The Ridgeway Deeps block cave project involved development of resources below the Ridgeway Underground mine at a depth of 300m to about 1,100m. It is the first natural caving operation and the deepest block cave in Australia. Ridgeway Deeps

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

2017-10-25  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 combined use of dimensional analysis and similitude studies in physical modelling coupled with numerical simulation, this paper reports results of a study of gravity flow of muck in ...

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Calibration of a mixing model for sublevel caving - UBC ...

Sublevel caving (SLC) is an underground mass mining method where the orebody is divided into a regular network of tunnels. The ore is extracted by level working downwards through the orebody. The caved waste from the overlying rock mass fills the void created by ore extraction generating a dynamic mixing situation between the broken ore and the waste (dilution) from upper levels. The dynamic ...

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Sublevel caving: Engineered to Perform - Elexon Mining

Sublevel caving: Engineered to Perform. Sub-level caving is a highly efficient, top-down, underground bulk mining method. Recent developments in sub-level cave mining have advanced the understanding of the technique and its production performance, which

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Sublevel Caving - Oraee

2016-9-19  Sublevel caving is a systematic method and uses regular layouts and working procedures. Development, production drilling and loading are carried out on separate levels, all independent of each other. Also, a number of faces are always available for production.

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Sublevel caving - ScienceDirect

Int. J, Rock Mech. Min. Sci. Vol. 3, pp. 129-153. Pergamon Press Ltd. 1966. Printed in Great Britain SUBLEVEL CAVING* I. JANELID and R. KvhPm Department of Mining and Mine Surveying, Royal Institute of Technology, Stockholm, Sweden (Received 1 November 1965) A~traet--The following article contains a summary of the results obtained by theoretical calculations, model experiments and large

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Parameters influencing full scale sublevel caving material ...

2021-6-25  The literature discusses a number of theoretical, small, and full scale experimental programs, which have aimed at identifying parameters influencing sublevel caving (SLC) material flow behaviour, and therefore ore recovery and dilution. Historically, parameters directly influencing flow behaviour have been found to include the geometry of the extraction layout and drives, sublevel height ...

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Dyno Nobel Improves Blasting Practices At Ridgeway

2013-11-12  mine’s pre-charging practices and improved the safety and efficiency of the operation. Background Ridgeway Gold Mine is an underground sublevel caving operation owned and managed by Newcrest Mining Ltd. The mine is located near Orange in NSW. Gold and copper ore are extracted using a mechanized fleet and

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Sublevel Caving - Oraee

2016-9-19  Sublevel caving is a systematic method and uses regular layouts and working procedures. Development, production drilling and loading are carried out on separate levels, all independent of each other. Also, a number of faces are always available for production.

Get Price

Calibration of a mixing model for sublevel caving - UBC ...

Sublevel caving (SLC) is an underground mass mining method where the orebody is divided into a regular network of tunnels. The ore is extracted by level working downwards through the orebody. The caved waste from the overlying rock mass fills the void created by ore extraction generating a dynamic mixing situation between the broken ore and the waste (dilution) from upper levels. The dynamic ...

Get Price

Sublevel caving: Engineered to Perform - Elexon Mining

Sublevel caving: Engineered to Perform. Sub-level caving is a highly efficient, top-down, underground bulk mining method. Recent developments in sub-level cave mining have advanced the understanding of the technique and its production performance, which

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Sub Level Caving - PHDessay

2017-3-3  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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Analysis of the surface subsidence induced by sublevel ...

2020-6-24  This paper describes a case study of the surface subsidence induced by sublevel caving without sill pillars in the Maogong Iron Mine, China. A comprehensive analysis based on GPS monitoring and numerical simulation is proposed and used to analyze the surface subsidence characteristics and damage range. GPS monitoring results showed that the vertical displacement reached 40.3 mm at the

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v118n7a6 Draw control strategies in sublevel caving

2018-8-13  Draw control strategies in sublevel caving mines — A baseline mapping of LKAB’s Malmberget and Kiirunavaara mines by G. Shekhar*, A. Gustafson*, P. Boeg-Jensen†, L. Malmgren†, and H. Schunnesson* $86(474 The Malmberget and Kiirunavaara mines are the two largest underground iron ore operations in the world. Luossavaara-Kiirunavaara AB ...

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Underground Caving Mining Methods Australia Mining ...

2019-12-16  Due to the huge volume of production, block caving is such a open pit mining but underground! In this method, ore is removed by the mining, or undercutting, of a thin horizontal layer at the mining level. Gravity and internal stresses within the rock mass are two of main functions in block caving. Sublevel caving (SLC) In this method, orebody ...

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Sub-level open stoping - QueensMineDesignWiki

2019-6-28  Description. 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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