mining of narrow steeply dipping veins

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

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 similar to granular material flow that is not only constrained by the end walls, but also affected by the hangingwall and footwall (a confined flow ...

Narrow Steeply Dipping Veins - curlymike.com.au

Mining of Narrow Steeply Dipping Veins AMC Reference Library – 2 Figure 1 - ASARCO INC. - Galena unit narrow cut and fill mining Mucking is by scraper with the winch mounted in the central raise timbering, or moved forward to a remote cribbed pass. For the first six sets up from the sill, the two outer compartments of

Strategies for Minimising and Predicting Dilution in ...

Narrow Vein Mining Conference Ballarat, Vic, 14 - 15 October 2008 3 STRATEGIES FOR MINIMISING AND PREDICTING DILUTION IN NARROW VEIN MINES – THE NARROW VEIN DILUTION METHOD-1.00-0.50 0.00 0.50 1.00 1.50 2.00 2.50 3.00 0 5 10 15 20 25 30 35 40 N) FIG 7 - Scatter plot showing the poor correlation between N and

Silvercorp Metals Inc. - Mining 101

There are several mining methods that can be used for narrow, steeply-dipping veins like those at our Ying and GC operations. The most cost-effective narrow vein mining technique is shrinkage stoping. This approach allows the development of large stopes, thereby reducing the amount of development required relative to stope volumes.

Conventional versus mechanized cut and fill mining ...

The conventional cut-and-fill method presented below represents a mine with steeply dipping veins that are 3.5 metres in width and 1,900 metres along strike. Access to the mine is via an 863-metre shaft. Haulage to the shaft is via rail. Stoping includes drilling and blasting with jackleg drills, slushing to ore chutes and sand filling.

Choice of Method - Welcome to the Narrow-Vein Mining Project

Veins mined by these methods typically range from 0.20 m to 2 m (0.65 to 6.5 ft) and are usually higher grade material. Mucking is accomplished by the use of appropriate sized slusher. Shrinkage mining is practised in ore zones that are steeply dipping and are continuous along strike.

Mining ppt 2014 - SlideShare

Open Underhand stoping : • It is best suited to narrow steeply dipping veins with strong walls. • Ore requires No sorting. Open Overhand stoping : • In this method stoping is started from a raise, in the lower level and progesses upwards. • Working face is free for miners. • It's use higher and low dip …

TUNGSTEN - Almonty Industries

Underground mining methods commonly used in, or considered for, tungsten mining include: Best suited for steeply dipping veins or narrow well-delineated skar n orebodies - Narrow-vein open stoping [example: Chollja, Bolivia] - Shrinkage Stoping [example: Pasta Bueno, Peru] - Cut & Fill with resuing fill - Cut & Fill [historic: Springer, USA]

Anaconda Mining Reaches Finals of Goldcorp's International ...

Anaconda has several steeply dipping narrow vein gold deposits within its asset portfolio on the island of Newfoundland. These deposits have limited economics using existing mining methods. However, preliminary economic analysis of SMD method indicates that the deposit could be mined with a net profit.

British Mining No 57 Memoirs 1996 pp150-170

method. The less complex veins are more applicable to mining by longhole open stoping with less, but still effective geological control. The Camborne-Redruth mining district, where South Crofty is located, contains a series of east-north-east-trending and steeply-dipping veins hosted in larger lode zones.

(PDF) UNDERGROUND MINING METHODS | Timileyin Ayomide ...

2.1.1 Cut-and-Fill Method The principles of cut-and-fill mining are shown in Fig. 3. The method is designed for selective mining of the steeply dipping veins, in particular for the narrow high-grade ore bodies. The method removes the ore in horizontal slices, starting from the bottom undercut an advancing upward on a backfilled base (Fig. 3).

Types of Underground Mining Method Comparison

Mining by Combination Stoping. In a discussion of stoping methods, steeply pitching veins are usually referred to, because the majority of veins in nature are steeper than 45°, and also because to refer each method of stoping to veins of all dips causes confusion.

EXPLORATION UPDATE CLEOPATRA GOLD & UTARA ... - …

pegmatite intersections tended to be narrow and steeply dipping with inconsistent and variable mineralisation. o A steeply dipping mineralised pegmatite trending -045 NE was identified in holes 030 U18RC0001, 7 10, 22, 23 and 31. Table 2 – Utara Prospect Drill Hole Intersects (April-May 2018) Hole ID Hole Type Easting Northing RL Dip Azimuth

Mining method for steeply dipping ore bodies - Placer Dome ...

The present invention relates generally to mining valuable mineral and/or metal deposits and specifically to mining steeply dipping valuable mineral and/or metal deposits. BACKGROUND OF THE INVENTION. Considerable amounts of valuable metals are contained in steeply dipping ore bodies, particularly narrow vein deposits. Such ore bodies typically ...

Major Mines & Projects | zz_Davidson Tisdale Project

Open pit development is characterized by relatively high stripping ratios as the primary production target is narrow steeply dipping veins. Maintaining mining selectivity to control dilution and extraction will be paramount, as well as keeping operating conditions safe as the open pits will encounter stope voids from historic underground mining ...

Narrow Vein Mining Fit for the Future | E & MJ

This consists of a network of very narrow, steeply dipping veins which aren't conducive to economic recovery through conventional selective mining methods. However, following its presentation at the Disrupt Mining event in 2019, the team realized that SMD could benefit many other operations too.

Underground Mining Methods - UFRGS

Step room-and-pillar mining (Figure 1.4) is an adaptation of trackless mining to ore bodies where dip is too steep for rubber- tired vehicles. A special "angle" orientation of haulage drifts and stopes related to dip creates work areas with level floors. This allows trackless equipment to be …

Idaho's Silver Valley Poised for Expansion - MINING.COM

Most of these metals were produced from steeply dipping narrow veins, some of which extend from surface outcroppings to a mile or more deep. ... Narrow vein mining at these depths is …

Waste rock dilution in stoping of steeply dipping narrow ...

Waste rock dilution in stoping of steeply dipping narrow-vein deposits Title: Waste rock dilution in stoping of steeply dipping narrow-vein deposits: Author(s): Louwerse, Dennis: Date: : Language: en: Pages: 89+39: Major/Subject: European Mining Course: Degree programme: European Mining, Minerals and Environmental Programme (EMMEP ...

Seismic imaging of a near-vertical vein using controlled ...

New methodologies for narrow-vein mining are making thin, steeply dipping mineralized veins economically viable mining targets. Drilling is the normal method for delineation and resource evaluation prior to mining. However, for the evaluation of narrow veins, significant drilling of …

Mining Concept | Korean Metals Exploration

Novamera Inc. has developed an innovative and new mining method called Sustainable Mining by Drilling ("SMD"). SMD uses conventional Pile Top RCD drills used successfully by the Construction Industry and the proven Reverse Circulation Drilling ("RCD") method to extract ore from steeply-dipping narrow vein deposits.

Mine Fill in Narrow Vein Mining - ausimm.com

This paper details the many improvements possible in narrow vein mining from the use of treated mining/milling waste as mine fill. Such fill can be: treated mill tailing, cemented or uncemented; development muck, treated or untreated, cemented or uncemented; andsome combination of these materials, or surface sands/gravels. Treatments involved may be both physical (optimisation of …

NVM - Narrow Vein Mining | AcronymAttic

Mining of Narrow Steeply Dipping Veins Mining of Narrow Steeply Dipping Veins By B E Hall1 Introduction; Most of the equipment used in the narrow vein mining seen by narrow vein mining equipment. Whether transporting ore or backfilling stopes, the RDH 100D provides excellent load-handling capability in a powerful, compact design.

Anaconda Mining Partners in Innovative Narrow Vein Mining ...

Anaconda Mining Inc. has commenced a research and development project to develop, prototype and optimize a new technology to mine steeply-dipping narrow gold veins, that cannot be mined cost-effectively with existing technologies.

Types of Mining Methods | Sell Side Handbook

Longitudinal stoping, also referred to as bench stoping or sublevel benching is a preferred method when the orebody is thin and narrow and steeply dipping and sheet-like. Transverse longitudinal stoping, also commonly referred to as primary- secondary sequence mining is useful in cases where the rock quality of the hanging wall limits the ...

Mining of Narrow Steeply Dipping Veins - Turner Mining ...

Address PO Box 611, Wembley WA 6913. Copyright © 2021 Turner Mining and Geotechnical | Website powered by PWD Digital Agency . Menu

Narrow vein underground mining - Maptek

Narrow vein underground mining ... the overall dip and dip direction of the vein to rotate the input data to a sub-horizontal plane prior to modelling. Once rotated, this data can be modelled with grids and the output triangulation rotated back to its original position.

Underground hard-rock mining - 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.

Great Panther Mining Limited: Topia

They are steeply dipping and, due to their narrow width, mine development is 'on-vein' rather than parallel to it. Consequently, the veins are drilled at wide spacing from surface to trace their lateral continuity, then detail sampled underground as development progresses. Very little underground exploration drilling is conducted.

Resuing_2018.pdf - MINE 411 Underground Mining Methods ...

MINE 411 Underground Mining Methods & Equipment Instructor: Prof. Raymond S. Suglo 1 RESUING METHOD/STRIPPING METHOD Area of Application It is an artificially supported stoping method which requires support for the walls during mining. It is applied in mining very narrow steeply dipping high grade veins or paystreaks. The ore should be moderately strong but the walls (country rocks) are ...

Mexican Mining: Significant New Gold Discovery of 15.31 ...

The Montanez, Cantarranas and El Jal (a rarer NE trending vein) located in the Eastern Sector - that is, to the east of the NNE Fault - are high grade, narrow veins. These Veins generally dip steeply North or South with the Montanez vein paralleling the contact of the Monzonite sill and occurring in association with broader and lower grade Ag ...

Design and application of an efficient mining method for ...

Gently-dipping narrow veins are those with a dip angle less than 30° and a thickness between 0.8 and 4 m. Currently the main approaches used to extract the mineral resources in this type of deposit include the room-and-pillar method, breast stoping (overall mining method), the filling method, longwall caving. In

Impact of Underground Pre-concentration on Mining ...

A mechanized alternative to the resue mining of steeply-dipping narrow vein gold deposits of the Witwatersrand has been proposed by others (Pickering et al, 1999). A similar mining method has been adopted at Placer's South Deep in some mining sections, with interesting results. The planned grade of ore delivered from the thick seam mechanized ...