longhole stoping mining method

Practical long

of over 300 m below surface. The main mining method in use at this mine is bottom-up longhole stoping (LHS) with cemented rockfill (CRF). Figure 1 illustrates a schematic diagram of the CRF stoping method. The mining sequence will follow.

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Types of Underground Mining Method Comparison

 · Underhand Stoping Mining Method The method of underhand stoping in which the ore is drawn to the level above (B, Fig. .1), is called Cornish stoping. It finds application only when it is necessary to mine a lens of good ore below a level and it is not practicable or financially possible to do the necessary development to come up from underneath.

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Stoping

At Olympic Dam, mining is by longhole open stoping, back-filled after ore extraction. This means that a block of ore is drilled from below and above, then blasted so that up to 80,000 tonnes is broken at once.

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Raise bored slot raises: A modern mining technique

level stoping mining method. The average stope height is 25 meters but can be as high as 40 meters. The original long-hole open stoping method required 21 drill holes for opening a drop raise in each stope, using the same conventional long-hole rigs as that were.

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Long hole drilling for the platinum industry— a mining …

could possibly be accommodated by the stoping method. Channel widths The primary aim of the stoping method is to increase ore recovery by reducing dilution. Long hole drilling and blasting could theoretically be tailored to ensure a selective minimum mining.

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Narrow vein minimum dilution case study

AMC has conducted numerous studies to reduce dilution for mechanized narrow vein (NV) mining methods in operating mines. Methods have included longhole open stoping (LHOS) and mechanized cut and fill (CAF). Dilution can be classed as planned or.

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Sub

Blasthole stoping involves establishing drill access above the mineralization and extraction access below the mineralization. The area between the upper and lower ….

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Stoping Mining Methods

 · Stoping Methods A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in . This classification has been used ever since as a basis for describing methods in its publications dealing with.

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Techniques in Underground Mining

Shrinkage stoping may be termed a "classic" mining method, having been perhaps the most popular mining method for most of the past century. It has largely been replaced by mechanized methods but is still used in many small mines around the world.

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Transverse longhole stoping

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.

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Mandalay Resources Corporation

The mining method employed is long-hole stoping with cemented rock fill. Ore is accessed by a primary spiral ramp. Level spacing is at 10 m centers and horizontal development is advanced in a minimum of 1.8 m wide drives in both directions of the deposit.

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Long Hole Drilling

For drilling in the larger bulk mining stopes, we can drill 64mm holes with a T38 drill string, 76mm holes with a T45 drill string or 89mm holes with a T51 string. Whether part of a production drilling program, or sometimes as a single job, we are often required to drill Long Hole Rises. These can ….

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Choice of Method

Longhole method with paste backfilling is used in wider stoping areas. Longhole levels are advanced at 60 m (196 ft) vertical intervals with sub-levels at 20 m (65 ft) intervals. Haulage drifts are driven in the footwall about 12 m (39 ft) offset from the ore zone.

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Geotechnical approach to stope and pillar optimisation at Granny …

The mining methods used are: Inclined room and pillar. Transverse longhole open stoping. Longhole wall slash. An additional mining method which is locally referred to as 'bulk' is being carried out for mining multiple lodes (lenses) that are in close2.3.

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Mining Intelligence and News

Mining Method Cut & Fill Sub-level open stoping (SLOS) Longhole open stoping Transverse open stoping Longitudinal stoping Cemented backfill Paste backfill Processing Dewatering Flotation Mine Life ….

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Chapter

selecting a mining method, with the emphasis on underground mass mining techniques, such ns caving, induced caving, and stoping, is proposed. In the past, selection of a mining method for a new property was based primarily on operating experience.

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The Stoping Method

The stoping method used in a U/G mine is also referred to as the mining method, even though stoping is only one part of the mining process. It is the phase which yields most of the ore produced. Selection of stoping method is one of the most important parts of U/G mine design and is influenced by: Dimensions (size & shape) of the orebody.

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Chapter

selecting a mining method, with the emphasis on underground mass mining techniques, such ns caving, induced caving, and stoping, is proposed. In the past, selection of a mining method for a new property was based primarily on operating experience.

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Wikizero

The specific method of stoping depends on a number of considerations, both technical and economical, based largely on the geology of the ore body being mined. These include the incline of the deposit (whether it is flat, tilted or vertical), the width of the deposit, the grade of the ore, the hardness and strength of the surrounding rock, and the cost of materials for supports.

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Stoping Mining Methods

 · Stoping Methods A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in . This classification has been used ever since as a basis for describing methods in its ….

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Sublevel stoping..Underground mining methods

 · Characteristic of Sublevel Stoping Method Advantages Moderate to high productivity per man-shift Moderate cost of mining (relat = 0.4.) Moderate to high production rate Suitable for mechanization Low exposure to unsafe conditions Possibility of simultaneous unit operations Average recovery (75%); Moderate dilution (up to 20%).

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Stoping

towards mechanised mining methods. Longhole stoping is the dominant narrow vein mining method in both Australia and Canada. While longhole stoping has lower mining costs per tonne and higher production rates than conventional mining methods, longhole.

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(PDF) Geotechnical Considerations for Mining Method …

4.1 Long Hole Mining Method Long hole stoping is a bulk mining method; it has a low operating cost and typically applied to large ore bodies in strong wall rock. In this method, two sill drifts are excavated from top and bottom of a given production level.

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