mining shrinkage mining method

Types of Mining Methods  Sell Side Handbook

Mar 09, 2018· Shrinkage stoping is an overhand mining method that is used for self supporting vertical ore bodies. In this method, ore is mined in horizontal slices, starting from the bottom to the top of the stope. The broken ore is left in the mined out stope and serves as a support to the stope walls and a working platform for mining the ore above.

Appendix C Mining Methods   April 2014   Wilton

Description of Mining Methods Shrinkage Stoping Shrinkage stoping is applicable to ore zones that are dipping at least 55 degrees and that range in width from roughly 1.2 to 4.5 meters. The enclosing waste rock mustpetent and not subject to failure so that when the ore is drawn from the stope, dilution is kept to a minimum.

Shrinkage Mining Method Gold Ridge  Winston Gold Corp.

SHRINKAGE MINING METHOD. This method requires the least capital investment and can be operated with small crews. It is most suitable for orebodies with 1. Steep dips 2. Competent ore 3. Stable hanging and footwall 4. Regular ore boundaries 5. Ore that is not affected by storage in stopes 6. Orebody with widths up to 12 metres.

Shrinkage Stoping   Introduction to Shrinkage Stoping

GENERAL DESCRIPTION Shrinkage or shrinkage stoping refers to any mining method in which broken ore is temporarily retained in the stope to provide a working platform and/or to offer temporary support to the stope walls during active mining. Since ore swells when broken, it is necessary to shrink the muck pile a corresponding amount by draw

Shrinkage Mining Method Gold Ridge  Winston Gold Corp.

SHRINKAGE MINING METHOD. This method requires the least capital investment and can be operated with small crews. It is most suitable for orebodies with 1. Steep dips 2. Competent ore 3. Stable hanging and footwall 4. Regular ore boundaries 5. Ore that is not affected by storage in stopes 6. Orebody with widths up to 12 metres.

Shrinkage_Method_2018.pdf   MINE 411 Underground Mining

MINE 411 Underground Mining Methods Equipment Instructor: Prof. Raymond S. Suglo Students: UMaT BSc. III 1 SHRINKAGE STOPING METHOD Method is classified as a supported stoping method but the support is really the broken ore left in the stope. Areas of Application The method is employed to mine medium to large steeply dipping orebodies where the ore is

Appendix C Mining Methods   April 2014   Wilton

Description of Mining Methods Shrinkage Stoping Shrinkage stoping is applicable to ore zones that are dipping at least 55 degrees and that range in width from roughly 1.2 to 4.5 meters. The enclosing waste rock mustpetent and not subject to failure so that when the ore is drawn from the stope, dilution is kept to a minimum.

SECTION 10 SHRINKAGE METHODS Mike Turner

Shrinkage mining wasmon stoping method prior to mechanised mining and the introduction of hydraulic fill. Sub level stoping, cut and fill mining and sub level caving have generally replaced shrinkage mining in Australia, Europe and Canada. The method is still used in a handful of non mechanised mines in South America, Africa, Asia and Canada.

12. Mining methods and method selection

12.4 Underground mining method Shrink Shrinkage stoping Applied to vertical or subverticaladvance of mining in a stope. Broken ore used as both a working platform and temporary support. Drilling blasting ®ore extraction ®scaling supporting.

Shrinkage Stoping   Introduction to Shrinkage Stoping

GENERAL DESCRIPTION Shrinkage or shrinkage stoping refers to any mining method in which broken ore is temporarily retained in the stope to provide a working platform and/or to offer temporary support to the stope walls during active mining. Since ore swells when broken, it is necessary to shrink the muck pile a corresponding amount by draw

Shrinkage Stope Mining, Mining Methods, Mining Techniques

When correctly planned and executed, shrinkage mining is a very effectual technique for ore mining and underground construction. It is used where the hanging and footwalls of the excavation are strong sufficient to be self supporting, although artificial support like rock and cable bolts might be installed as shrinkage progresses.

Selection of mining method   QueensMineDesignWiki

Selection of mining method. Context: The selection of a mining method for a given orebody can be a challenging assignment and may need to address personal bias for or against a particular method.The selection of the mining method may also need to occur prior topletion of desired geotechnical or ore value determinations.

Types of Underground Miningparison

Table of ContentsFactors Affecting Choice of MethodReview of Stoping MethodsUnderhand Stoping Mining MethodOverhand Stoping MethodLongitudinal Back, Flat Back Mining MethodLong Wall StopingmMining MethodRill Cut Stoping MiningSaw Tooth Back StopingShrinkage StopingMiningbination StopingSide StopingBreast StopingSublevel StopingSquare Set StopingFilling MethodsCaving Methods

CN101881169A   Sublevel shrinkage caving stage open stope

The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining.

Shrinkage stoping   QueensMineDesignWiki

Shrinkage stoping is a mining method used for steeply dipping, narrower ore bodies with self supporting walls and ore. It is an overhand mining method that relies on broken ore being left in the stope to be used as the working floor and to support the walls.

Statistics   ShrinkageRegularization of Regression

Shrinkage methods are more modern techniques in which we don't actually select variables explicitly but rather we fit a model containing all p predictors using a technique that constrains or regularizes the coefficient estimates, or equivalently, that shrinks the coefficient estimates towards zero relative to the least squares estimates.

Stoping

SummaryOverviewOpen stope systemsTimbered stope systemsShrinkage stopingLong hole stoping

A stope can be created in a variety of ways. 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.

Shrinkage Stoping at the Crean Hill Mine

Shrinkage is an adaptable mining method that is currently employed in narrow irregular ore zones, as undercuts for in the hole blast¬hole stopes, in ore bodies that do not extend from level to level, and in areas where quick production is required with a minimum of capital outlay or minimum develop¬ment.

Underground Mining Methods  New Pacific Metals

Cut and fill mining can be expensive, but this method allows for highly selective mining with less waste rock or low grade ores mined out which keeps production costs low. Its typically used in situations where the orebody dips steeply or is very irregular, which makes mechanized long hole methods difficult to implement. Shrinkage

Statistics   ShrinkageRegularization of Regression

Shrinkage methods are more modern techniques in which we don't actually select variables explicitly but rather we fit a model containing Data Mining Dimensionality number of variable, parameter P predictors using a technique that constrains or regularizes the coefficient estimates, or equivalently, that shrinks the coefficient estimates towards zero relative to the

Shrinkage_Method_2018.pdf   MINE 411 Underground Mining

MINE 411 Underground Mining Methods Equipment Instructor: Prof. Raymond S. Suglo Students: UMaT BSc. III 1 SHRINKAGE STOPING METHOD Method is classified as a supported stoping method but the support is really the broken ore left in the stope. Areas of Application The method is employed to mine medium to large steeply dipping orebodies where the ore is strong and the country rocks

Underground mining hard rock

Shrinkage stoping is a short hole mining method which is suitable for steeply dipping orebodies. This method is similar to cut and fill mining with the exception that after being blasted, broken ore is left in the stope where it is used to support the surrounding rock and as a platform from which to work.

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

Silvercorp Metals Inc.   Mining 101

Mining 101 Narrow Vein Mining Methods Shrinkage Stoping. 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.

Underground Mining Methods   Engineering Fundamentals

This book presents the latest mining principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented coveringmodity range from iron ore to diamonds extracted by operations located in all corners of the world.

Compare Stoping Methods of Mining

Table of ContentsFlexibilityPreparatory DevelopmentPercent Recovery of Ore and DilutionCost of Stoping The foregoing descriptions and discussion of the different stoping methods and practices and thepanying tabulated data indicate the conditions under which they may be applied and serve as a basisparing them. Stoping costs will be presented later.parisons of the

Mining Big Data Using Parsimonious Factor and Shrinkage

shrinkage methods, without use of factor analysis at any stage. Specication Type 4: Prediction models are constructed using only shrinkage methods, and only with variables which have nonzero coe¢ cients, as specied via pre selection using SPCA. Kim Swanson BOK and Rutgers Mining Big Data in Parsimonious Ways Apr 7th, 2014 23 / 28

Underground mining hard rock

Shrinkage stoping is a short hole mining method which is suitable for steeply dipping orebodies. This method is similar to cut and fill mining with the exception that after being blasted, broken ore is left in the stope where it is used to support the

Design  Operating Principles in Caving Methods

SUMMARY UNDERGROUND MINING METHODS. Method Tonnes / Avg. Tonnes / Relative Mining Manshift Day Milled Cost/Tonne Resuing 0.20 0.50 50 100 + 70+ Shrinkage 20 28 200 800 20 50 Cut and fill 12 48 500 1500 20 70 Room and Pillar 15 150 1500 10 000 7 20

Types of Underground Miningparison

Table of ContentsFactors Affecting Choice of MethodReview of Stoping MethodsUnderhand Stoping Mining MethodOverhand Stoping MethodLongitudinal Back, Flat Back Mining MethodLong Wall StopingmMining MethodRill Cut Stoping MiningSaw Tooth Back StopingShrinkage StopingMiningbination StopingSide StopingBreast StopingSublevel StopingSquare Set StopingFilling MethodsCaving Methods

12. Mining methods and method selection

12.4 Underground mining method Shrink Shrinkage stoping Applied to vertical or subverticaladvance of mining in a stope. Broken ore used as both a working platform and temporary support. Drilling blasting ®ore extraction ®scaling supporting.