longhole avoca mining method

longhole avoca mining method

Longitudinal longhole retreat QueensMineDesignWiki

If a longitudinal longhole mining method is to be used, then there are three variations to choose from. None of these methods are very common in Canada. Avoca is the primary method, with the eureka and creeping cone methods being secondary and tertiary in common usage. Avoca. Avoca mining consists of an undercut level and an overcut level.

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Longhole Welcome to the Narrow-Vein Mining Project

Longhole. This method consists in a variety of chambers where the mine blocks are generally cut by sub-levels from which long holes are drilled in plans that are generally parallel. These boreholes allow to blast the block by successive vertical break. The broken ore is mucked out by drawpoints or by longitudinal retreat.

Transverse longhole stoping QueensMineDesignWiki

Description

Longhole Avoca Mining Method | Pdf Design Of Stoping

Longhole Avoca Mining Method. Pdf Design Of Stoping Parameters And Support System For, Longhole stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing it encompasses advantage of faster stope production Longhole Avoca Mining Method.

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Description of mining methods (step by step)

Primary Mining Method Modified Avoca. Information. GENERAL INFORMATION The Miitel mine is actually in a development stage. The higher part of the orebody has been mined by the conventional cut-and-fill method. The lower part, the longhole modified Avoca method has been selected. A 17-m (55.7 ft) spacing between sub-levels is planned.

Sublevel Stoping Mining Method

Feb 10, 2018· Mining In Minnesota Cut and Fill Mining Method 3D Animation Duration: 6:36. ImageMaker Advertising, Inc. 108,734 views. 6:36. Top Five Useful Knots for camping, survival,

Black Diamond Drilling Services Australia PTY LTD[PDF]

Reducing Dilution with Technology A twist on the AVOCA

The majority of the mining at Musselwhite is completed using a modified AVOCA mining method. With the modified AVOCA method each blast is backfilled, then waste is removed from the backfilled stope to create a void for the next blast. As Musselwhite follows the ore body down plunge challenges have been encountered regarding stope dilution.

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Development of benchmark stoping widths for longhole

Mining method The Barkers mining method is a combination of the bottom-up ModiÞed Avoca method using development waste as Þll (tight Þlling) and longhole open stoping with small rib pillars. Figure 3 provides a schematic repre-sentation of the Barkers mining method. Barkers drilling and

Stoping Wikipedia

Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided.. The earliest forms of stoping were conducted with hand tools or by fire-setting; later gunpowder

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Development of benchmark stoping widths for longhole

Mining method The Barkers mining method is a combination of the bottom-up ModiÞed Avoca method using development waste as Þll (tight Þlling) and longhole open stoping with small rib pillars. Figure 3 provides a schematic repre-sentation of the Barkers mining method. Barkers drilling and

Effect of delayed backfill on open stope mining methods

Longhole mining methods such as Avoca or longhole retreat as practiced at the Musselwhite mine of Placer Dome employs 100% extraction with the use of fill walls to provide support to the adjacent stope. Transverse open stoping also practiced at Musselwhite employs cemented rock fill

Major Mines & Projects | Twin Creeks Mine

The plan includes the long hole stoping retreat and Avoca techniques but emphasizes the Avoca method. Once stoping begins between 60-foot levels to a planned depth of 800 feet below the portals, the team anticipates that the mine initially will produce about 600 ore tons a day and ramp up to about 1,200 ore tons a day in the last two years

Avoca methods of mining Basic Mining Techniques

1. Overview Avoca Method of mining is a variation of sublevel stoping method with the introduction of waste rockfill as backfill. This method is popular in high grade epithermal vein deposits where the strength and conditions of the walls of the open stopes are weak to moderate and require backfilling of waste rock to stabilise the walls, minimise the ore dilution and maximise the ore recovery.

(PDF) Design of stoping parameters and support system for

Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing. It encompasses advantage of Faster Stope Production

ALIMAK MINING METHOD PDF soldatikifo

Jun 23, 2020· Raise climbing, widely known as the Alimak mining method after the company that introduced it, is a variation on longhole stoping developed for narrow-veined, tabular ore bodies. Successful users of the technique have found that it accelerates their path to production by centring development work within the ore body.

Mining Methods Businesses Cameco

Mining Methods Boxhole Boring. Boxhole boring is similar to the raisebore method, but the drilling machine is located below the mineralization, so development is not required above the mineralization.From a drill chamber in waste rock below the ore, we drill a series of overlapping holes up through the ore zone and collect the falling ore from a chute in the extraction chamber.

(PDF) Underground mining Methods ResearchGate

2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flat-lying

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System Analysis and Simulation of Narrow Vein Mining

Mining methods for narrow vein deposits are highly selective mining methods and tend to be unproductive, while highly productive mining methods are unselective, and result in an increase in unwanted dilution. Often the adoption of a more highly productive mining method is precluded by the inherent decrease in head grade delivered by the

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Appendix C Mining Methods April 2014

Overhand Bench/Avoca Stoping Benching is a term used for mining methods where ore zones are extracted longitudinally with the majority of development in the orebody, advantages are: • requires the least amount of development • allows adjustment of the spans of unsupported hangingwall/footwall for the ground conditions

Underground mining (hard rock) Wikipedia

The mining method selected is determined by the size, shape, orientation and type of orebody to be mined. The orebody can be narrow vein such as a gold mine in the Witwatersrand, the orebody can be massive similar to the Olympic Dam mine, South Australia, or Cadia-Ridgeway Mine, New South Wales.The width or size of the orebody is determined by the grade as well as the distribution of the ore.

LONG HOLE DRILLING

Mar 07, 2016· Sublevel Stoping Mining Method Duration: 3:02. Black Diamond Drilling Services Australia PTY LTD 48,785 views. 3:02. Mining In Minnesota Cut and Fill Mining Method 3D Animation

RESUE MINING | Ouray Silver Mines

The resue mining method was used to profitably mine the Revenue-Virginius mine from 1885 to 1916. Recently, the OSM team conducted trial stoping on 200 feet of the Virginius Vein, and confirmed the viability and positive economics of the resue method.

Major Mines & Projects Mining Intelligence and News

The primary stoping method at the Holt Mine is mechanised long hole drilling and blasting within the mining blocks with rail transport to the shaft ore passes. The spacing between sublevels for long hole stoping varies between 20 m and 17 m, depending on the dip of the ore.

Underground mining (hard rock) Wikipedia

The mining method selected is determined by the size, shape, orientation and type of orebody to be mined. The orebody can be narrow vein such as a gold mine in the Witwatersrand, the orebody can be massive similar to the Olympic Dam mine, South Australia, or Cadia-Ridgeway Mine, New South Wales.The width or size of the orebody is determined by the grade as well as the distribution of the ore.

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System Analysis and Simulation of Narrow Vein Mining

Mining methods for narrow vein deposits are highly selective mining methods and tend to be unproductive, while highly productive mining methods are unselective, and result in an increase in unwanted dilution. Often the adoption of a more highly productive mining method is precluded by the inherent decrease in head grade delivered by the

Mining Blasthole stoping | Britannica

Mining Mining Blasthole stoping: When the dip of a deposit is steep (greater than about 55°), ore and waste strong, ore boundaries regular, and the deposit relatively thick, a system called blasthole stoping is used. A drift is driven along the bottom of the ore body, and this is eventually enlarged into the shape of a trough. At the end of the trough, a raise is driven to the drilling

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Longhole Stoping at the Asikoy Underground Copper Mine in

Mining Engineering Department, Dokuz Eylul University, úzmir, Turkey 1. Introduction Asikoy underground copper mine is located in Küre county, some 60 km north of Kastamonu province and 25 km from Black Sea cost. Underground mining method is longhole stoping with post backfill. Ore prod uction is 420.000 ton/year with an average of

Major Mines & Projects Mining Intelligence and News

The primary stoping method at the Holt Mine is mechanised long hole drilling and blasting within the mining blocks with rail transport to the shaft ore passes. The spacing between sublevels for long hole stoping varies between 20 m and 17 m, depending on the dip of the ore.

Narrow vein minimum dilution case study – AMC Consultants

Methods have included longhole open stoping (LHOS) and mechanized cut and fill (CAF). Dilution can be classed as planned or unplanned. Planned dilution accounts for waste material incorporated into the stope when designing practical mining shapes. Planned dilution will depend on the vein geometry, thickness, orebody dip, and local ground

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A long hole stoping system for mining narrow platinum reefs

A long hole stoping system for mining narrow platinum reefs Advantages of this mining method It allows for a low safety and health risk as well as improved working environment. Physical work is reduced and it is easier to motivate the workforce. Another advantage is the improvement in grade due to better control of dilution, as

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Appendix C Mining Methods April 2014

Overhand Bench/Avoca Stoping Benching is a term used for mining methods where ore zones are extracted longitudinally with the majority of development in the orebody, advantages are: • requires the least amount of development • allows adjustment of the spans of unsupported hangingwall/footwall for the ground conditions

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Underground Mining Methods and Equipment

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II Underground Mining Methods and Equipment S. Okubo and J. Yamatomi ©Encyclopedia of Life Support Systems (EOLSS) 2. Strength of the hanging wall, footwall, and ore body. 3. Economic value of the ore and grade distribution within the deposit.

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Strategies for Minimising and Predicting Dilution in

Canada. While longhole stoping has lower mining costs per tonne and higher production rates than conventional mining methods, longhole stoping has been associated with increased dilution. Therefore, mining method selection is relevant to minimising narrow vein dilution. The economic performance of narrow vein mines is particularly sensitive to

Reducing Dilution with Technology A twist on the AVOCA

Through the partnership, Orica identified an opportunity at Musselwhite to utilize their WebGen™ 100 wireless through the earth initiation system technology to help reduce dilution in longhole stoping. Musselwhite uses a modified AVOCA mining method. With increasing depth blast sizes have had to be reduced to control unplanned dilution.

AVOCA Mining Method | Economic Geology | Mining

Description. Modified Avoca mining method. Information: GENERAL INFORMATION. The Miitel mine is actually in a development stage. The higher part of the orebody has been mined by the conventional cut-and-fill method. The lower part, the longhole modified Avoca method has been selected. A 17-m (55.7 ft) spacing between sub-levels is planned. However, part of the orebody was already developed at

Digging deeper: Mining methods explained | Anglo American

The underground mining methods we use include room and pillar, narrow vein stoping and large-scale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them

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Improved technologies in longhole Mining and Blasting

method of charging holes. Considerable success has recently been achieved in this field. Improved technologies in longhole blast hole drilling, applied to dropraising and longhole stoping as well as the application of a small twin boom mechanized drillrig by P.H. Ferreira* Synopsis ‘Longhole blast hole drilling’ techniques are not new to