influence of striping ratio on open cast gypsum mining

Stripping ratio Wikipedia

Overview

Stripping Ratio | Mineral Production Activities

The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio Stripping is the removal of waste rock from above and around the orebody Stripping ratio is defined as the tonnage of waste rock to be mined, divided by the tonnage of ore to be mined from the pit Stripping ratio is influenced by the shape of the orebody and may vary

Stripping Ratios: What are They and Why are They

· A strip ratio, or stripping ratio, is an important measurement related to the openpit mining process It represents the amount of waste material, also known as

(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

UG = Underground cost of mining per ton of ore OP = Open pit cost of mining per ton of ore SC = open pit stripping cost per ton of waste SR = Breakeven stripping ratio, surface vs underground (tons waste/ton ore) Equate the underground mining costs per ton of ore to the total surface mining costs per ton of ore plus the required waste stripping: can be mined underground by block caving at a

Whats the average stripping ratio of open pit mines around

The stripping ratio in a mine is chosen based on economics A high grade orebody can support a high stripping ratio A low grade ore body cannot support a high stripping ratio Thus you may have a

Dear Amir,the question you are asking has no direct answer At least to my knowledge there can be no average stripping ratio of open pit mines ar1Dear George Barakos You are totally right But I was hoping that a statistical survey might have been done in this regard Thanks for your answer0Dear @Amir Khademian,that is the reason why I mentioned I would be interested as well if someone had such information However, my advise would b0Difficult to have an average worldwide due to many many parameters involved The two largest gold pits in Canada at the moment boast a similar was0Dear Michael Issigonis Thanks for your informationRegards0I totally agree with George BarakosEven if there has to be an average stripping right across the world , it will totally affect the cost as well0We often would use of rule of thumbs but always dependent on a lot of things and hence the ~~SR will always be based on economics and real costs et1 There cannot be a specific average stripping ratio of open pit mines around the world, simply because of varied ore characteristics and environme0Dear Gordon Foli Thanks for your answerRegards0

Strip Mining an overview | ScienceDirect Topics

Minerals are typically excavated by underground mining, strip mining, or openpit mining The selection of the mine design is dictated by the physical structure and value of the ore body and by the characteristics of the adjacent geological materials Although openpit mines and underground mines are the two most common mining strategies, placer mining and solution mining also have been used

Lecture 4 Calculating Stripping Ratios for Area Strip

Strategic Open Pit Mine Planning Course Ore Reserve Estimation 9Coal Mining Complete Stripping Ratio Considerations Box Cut & Bench Surface Mining Mine Planning & Design The Economic Definition of Ore Download now Jump to Page You are on page 1 of 11 Search inside document Calculating Stripping Ratios for Area Strip Mines Mnge 315 Dr B C Paul spring 2003 revised 2010

Easy profit maximization method for openpit mining

· It is worth noting the instant relationships that must exist between the quantities of ore, waste rock and the actual cutoff grade Fig 3 shows this typical variation, by means of introducing the concept of geological reserve Q + W, which is defined as the sum of the quantities of ore and waste, as well as showing a typical variation of the stripping ratio with cutoff grade

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OPEN CAST MINE PLANNING Mining and Blasting

OPEN CAST MINE PLANNING Factors that influence planning: 1) Demand of coal a Countrywide demand b Regional demand 2) Distribution of coal deposits 3) Quality of coal 4) Pricing policy for coal 5) Available infrastructures: rail, road, power, etc 6) Nature of deposits (influences site, area method of work, & equipments of mining) 7) Availability of equipment 8) Existing work culture Surface

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Surface mining planning and design of open pit mining

· Basic Concept 12) Open pit Mining method 13) Bench 14) Open Pit Bench Terminology 15) Bench height 16) Cutoff grade 17) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) 18) Openpit mining sequence 19) Various openpit and orebody configurations We will explore all of the above in Topic 6

LAND DEGRADATION DUE TO MINING AND ITS REMEDIAL

Openpit mines produce 8 to 10 times as much waste as underground mines [1] II LAND DEGRADATION The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore Lower the ratio, the more productive the mine Stripping ratio varies with

SURFACE MINING – Mining Engineering Site

· Auger mining is a mining method that recovers coal or other minerals from under the highwall when the ultimate stripping ratio has been achieved in open cast mining operations or Auger mining refers to a method for recovering coal from thin seams, 06 to 24m thick, beyond a highwall produced by conventional open cast or strip mining (area mining or contour mining), or from

Optimization of Blasting Parameters in opencast Mines

Manager, Basundra Open cast Project (MCL); Sri M Majhi, Sr Under Manager, Ananta Opencast Project (MCL) and Sri P K Mishra, Under Manager, Kalinga Opencast Project (MCL), and blasting in charge of of Bharatpur Opencast Project for their help in providing the necessary information for the dissertation work Last but not the least, our sincere thanks to all our friends who have extended all

(PDF) Geology and coal potential of Somaliland

influence on younger fault trends The movem Furthermore, open cast mining will probably not be economically feasible due to the high stripping ratio (>10) an d thick and hard overburden

Design of openpit mining SlideShare

· Economic stripping ratio varies with: • Average sales realization ie higher the quality of coal, higher the realization • Capital investment requirements • Operating cost • Also surface constraints Projects are likely to be economically viable upto a maximum SR indicated against the grade of coal Grade Stripping ratio (Cum/T) F 8 E 9 D 10 C 12 ISN

RSMML Mining of Rock phosphate, gypsum, Lignite

With an annual rock handling of about 20 million tonnes, Jhamarkotra is probably the largest open cast mine in India outside the steel and coal sectors On technical fronts the problem of ground water had affected the mining operations, until an effective dewatering scheme was evolved and implemented The geometry of the ore body ie thin and sharply dipping had resulted in long and narrow

What is Strip Mining? (with pictures) wiseGEEK

· Strip mining is a type of surface mining which involves the removal of a thin layer of material known as an “overburden” to access buried deposits of useful minerals This type of mining is only effective in areas where mineral deposits are very close to the surface, making it feasible to quickly and easily remove the overburden to get to them Classically, strip mining is used to mine tar

OPERATIONS •4' RESEARCH CENTER

OPTIMUM OPEN PIT MINE PRODUCTION SCHEDULING by THYS B JOHNSON 4 'J r3 ORC 6811 MAY 1968 JJtfJl/'/>~> i in * ' • •4' •M OPERATIONS RESEARCH CENTER tl Ü UNIVERSITY OF CALIFORNIA • BERKELEY I OPTIMUM OPEN PIT MINK PRODUCTION SCHEDULING by Thys B Johnson Operations Research Center University of California, Berkeley Lay ORC1968 6811 This

Study of the Dynamic Development Law of Overburden

· The average thickness of the main mining 15# coal seam is 54 m, the average dip angle is 4°, and the average buried depth is 480 m The daily mining distance of this working face is 64 m

Glossary of Blasting Terms Mining and Blasting

The horizontal ledge in an excavation or mining operation along which holes are drilled vertically Binary Explosive An explosive prepared by mixing 2 nonexplosive materials which when combined form a capsensitive explosive Blast The action of breaking and displacing rock by means of explosives SHOT also means blast Blast Area The area of a blast within the influence of flying rock

SURFACE MINING – Mining Engineering Site

· Auger mining is a mining method that recovers coal or other minerals from under the highwall when the ultimate stripping ratio has been achieved in open cast mining operations or Auger mining refers to a method for recovering coal from thin seams, 06 to 24m thick, beyond a highwall produced by conventional open cast or strip mining (area mining or contour mining), or from

Reading: OpenPit Mining | Geology

Openpit mining, or opencast mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow This form of mining differs from extractive methods that require tunneling into the earth, such as long wall mining Openpit mines are used when deposits of commercially useful minerals or rocks are found near the surface; that is, where

Measurement of blast damage Office of Surface Mining

• the stripping ratio can be in­ creased; MINING ENGINEERING Ill JUNE 1997 103 • mechanical support, scaling and secondary blasting costs can be reduced; • the berm interval can be increased, because the pit walls and berms are more sound; • costly damage to buildings or tunnels can be pre­ vented by controlling vibrations from blasting; • rockfall hazards to miners and equipment

Sodic soil management

being treated, leave an untreated strip to show whether gypsum has had an effect If the treated soil responds to gypsum, you will notice increased soil friability, less power needed for tillage, improved infiltration, less waterlogging, and better seedling emergence Lime application to sodic soils Lime (calcium carbonate), like gypsum, is a compound containing calcium Therefore it can

What is Strip Mining? (with pictures) wiseGEEK

· Strip mining is a type of surface mining which involves the removal of a thin layer of material known as an “overburden” to access buried deposits of useful minerals This type of mining is only effective in areas where mineral deposits are very close to the surface, making it feasible to quickly and easily remove the overburden to get to them Classically, strip mining is used to mine tar

Laboratory Testing of Cemented Rock Fill for Open Stope

Rock Fill for Open Stope Support M Cordova1, H Saw2 and E Villaescusa3 ABSTRACT Cemented rock fill (CRF) is often used to support open stope voids This allows for the full recovery of ore while achieving global mine stability In such cases, the exposed CRF masses require adequate compressive strength and stiffness to resist the forces and limit the displacement associated with movements in

Study of the Dynamic Development Law of Overburden

· The average thickness of the main mining 15# coal seam is 54 m, the average dip angle is 4°, and the average buried depth is 480 m The daily mining distance of this working face is 64 m

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1

For civil and mining engineering projects that i nvolve rocks either as construction or foundation materials, a question which often arises in pr actice is: "will the combination of initial stresses and stresses induced by the construction and ope ration of an engineering structure produce rock failure and what will be the extent of the failure zone" In order to answer that question, it is

Bauxite in Jamaica Geo for CXC

Due to the methods of mining (open cast), the end result of mining on the landscape is very unsightly Jamaican regulations ensure that the land is reclaimed when mining in an area is complete The topsoil is removed and preserved before mining begins When mining is done, the land is smoothed , the topsoil is replaced and grass is planted Another issue is the disposal of the red mud produced

Transverse longhole stoping QueensMineDesignWiki

Most open stope mines, including mines which practice transverse longhole stoping, sequence their stopes based on the high stress conditions of underground mining One popular method of mine sequencing known as the 159 sequence is outlined in the image to the left of the page See Also Stope Sequencing Drilling, Blasting, and Equipment Drilling