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Stripping ratiois a term that is derived from theminingindustry and is used in reference to the open-pitminingprocess. Thestripping ratiomethod of calculating the profitability of theminingprocedure is commonly used in the ore or coalminingprocess.
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Oct 31, 2018· Calculatingstripping ratiosAt their most basic,strip ratioscan be calculated by dividing overburden thickness byore thickness. For example, an overburden thickness of 100 meters and an ore...
Stripping ratio is defined asthe 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 considerably during the life of the mine. Except in rare cases, it increases with depth of the orebody below surface. The unit cost of mining may increase over the life of a pit due to increased stripping ratio and the longer …
Jan 12, 2021· Stripping ratio isa term that is derived from the mining industry and is used in reference to the open-pit mining process.The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process. In relation to its application in the mining of ore, the utility of the stripping ratio is the determination of the approximate ratio of waste material …
The amount of ore uncovered is A4: A4 = 100 * 25 + 100 * 25 = 5,000 ft2 2A3 = 125 * 125 -100 * 100 = 5,625 ft2 The instantaneous stripping ratio is: 5,625 SR (instantaneous) = = 1.125 5,000 The overall stripping ratio with bench 7 removed is: 15,625 SR (overall) = = 0.48 32,500 Bench 8 With mining of bench 8, another 5,000 ft2 of ore (A6) is removed.
In coal mining: Choosing a miningmethod …calculated with the aid ofstripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal.Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of producing and… Read More
The Coal Area Strip Mine Formula •Strip Ratio = OB Thickness (in ft) * 11.11/Coal thickness in inches – Assumes coal is 80 lbs/ft^3 (good for bituminous) – Area Strip Mine Geometry – Geologic Stripping Ratio – no accounting for rehandle or less than 100% coal recovery Your Turn • Use What You Have Learned About Calculating Stripping Ratios for Strip Mines and Break Even Limits to Determine the Size of a …
The break-even stripping ratio is a function of ore value and the costs involved.Read More. In coal mining: Contour strip mining. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made. Otherwise, if there are sufficient reserves under the knob of the hill, the coal may be recovered by underground mining or by augering.
BasicMiningTechniques
BasicMiningTechniques
Books such as “Elements of Practical CoalMining” and SME’s “SurfaceMining” were specifically referencedStripping Ratioas a Fundamental • Ability to surface mine depends on the value of the ore being high enough to offset the cost of Overburden Removal –Stripping Ratiodetermines relative amounts of each to be moved • If ...
Thestrip ratio(SR) is the simplest measure ofminingefficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, astrip ratioof 2 is considered high but feasible if the ore grade is high enough. A better measure ofminingeconomics is the TV:BIPratio.
Thestripping ratio(SR) refers to the amount of waste that must be removed for a given quantity of ore in open-pitmining. It is commonly expressed as: It is commonly expressed as: SR=Waste (tons ...
Books such as Elements of Practical CoalMiningand SMEs SurfaceMiningwere specifically referencedStripping Ratioas a Fundamental Ability to surface mine depends on the value of the ore being high enough to offset the cost of Overburden RemovalStripping Ratiodetermines relative amounts of each to be moved. If coal generates a $5/ton ...
Stripping ratioand pit limit Gideon Gipmai Yowa (July, 2017) Senior Instructor,MiningEng. Dept., PNG University of Technolog... Economic Evaluation and Example (repost) In this post we will go through few tips on evaluating the economic viability of a mineral deposit (simple alluvialminingoperation).
May 08, 2020· The quickratiois important for evaluatingminingcompanies because of the substantial capital expenditures and financing necessary formining…
AVERAGESTRIP RATIO: Total waste divided by total ore within the ultimate pit. CUTOFFSTRIPPING RATIO: Costs ofmininga ton of ore and associated waste equals to net revenue from the ton of ore.
The fraction of waste rock to ore excavated is defined as thestripping ratio.Strippingratios of 2:1 up to 4:1 are not uncommon in largeminingoperations. Ratios above 6:1 tend to be less economically viable, depending on the commodity. Once removed, overburden can be used for road and tailings construction or may have non-miningcommercial ...
Break EvenStripping Ratio(BESR)/MaximumStripping Ratio(SR max)/Cut offStripping Ratio: This is defined as thatstripping ratioat which cost ofminingone tonne of ore & corresponding volume of waste material equals the revenue received by sale of one tonne of orebody OR when cost ofminingore & waste matches with revenue generated by sale of ore. • Overall Pit Limit is decided by Break ...
Jan 14, 2021· Thestrip ratiofor 2020 was 3.8 waste tonnes to ore tonnes, a decrease from 4.3 in 2019, as the mine operation completedminingin the Pine Cove Pit throughout 2020 and the tonnes of waste moved decreased accordingly. Thestrip ratioof 4.1 waste tonnes to ore tonnes in Q4 2020 reflects the impact of the commencement of development at Argyle.
Stripping RatioCalculation InMining- cz-euStripping ratio- Wikipedia, the free encyclopedia Inmining, stripping ratioorstrip ratiorefers to theratioof the volume of overburden (or waste material) required to be handled in order to extract some volume of . Get Price And Support Online;stripping ratioin coalmining- crusherasia. Get ...
20181018&ensp·&enspStrip ratio decreased from 7.4 to 2.2 due to mining returning to ore after waste mining in Q4 for TSF lift Prestrip mining of higher grade satellite pits Dogbolter & Anchor continued (first production expected in Q2) Q1 AISC of $898 per ounce (down 22% on Q4) reflective of substantial decrease in strip ratio >Get Price; Underground mining (hard rock) Wikipedia
The fraction of waste rock to ore excavated is defined as the stripping ratio. Stripping ratios of 2:1 up to 4:1 are not uncommon in large mining operations. Ratios above 6:1 tend to be less economically viable, depending on the commodity.
2 days ago· What isStrip Mining? Surfacemining, countingstrip mining, mountaintop removalminingand open-pitmining, is a wide classification ofminingwhere soil and rock covering the mineral source (the ‘overburden’) are gotten rid of, unlike undergroundmining(or deepmining) where the overlying rock is kept in place, and the mineral is taken out through shafts or tunnels.
Stripping ratio is always expressed as volume of non-key material per weight of key material (yd^3/ton or m^3/tonne) The None option will not output the stripping ratio as contours or a grid file. Note that when this option is used, the stripping ratio will still be calculated in the final report.
MI1033 - Introduction to Mining. Module #4 – Development and Production. Expert Answer. In open pit mining, the stripping ratio refers to the amount of overburden to be removed in order to extract some amount of ore. For example the stripping view the full answer. PreviousquestionNextquestion.
The overburden is removed by opening successive and progressive benches in the case of deep-seated bedded deposit within a permissible stripping ratio. It continues until sufficient area over the ore is exposed. Multiple seam mining is done by operating a first pair of overburden and coal beds, followed by second and third pairs in sequence.
Strip itself is easily understood in coal mining where you may have 20 metres of overburden before you expose a 2 metre coal seam. In this case, it is a simple to just divide the length of the overburden by the length of the coal seam (20/2 = 10:1 strip ratio) That is coal mining or strip mining at its core. Get Price
Strip Ratioof X:Y, (waste, mill feed including low grade stockpile) This site uses cookies. Some of these cookies are essential to the operation of the site, while others help to improve your experience by providing insights into how the site is being used.
Seams consist of bright coal, mainly vitrinite, alternating with dull detrital coal, carbonaceous shale and shale. The shale to coal ratio in the Chipanga seam is in the order of 60/40. The Chipanga Seam is economically the most important of the coal seams, as it is thicker and laterally more extensive and therefore has the largest reserves.
Jan 14, 2021· Thestrip ratiofor 2020 was 3.8 waste tonnes to ore tonnes, a decrease from 4.3 in 2019, as the mine operation completedminingin the Pine Cove Pit throughout 2020 and the tonnes of waste moved decreased accordingly. Thestrip ratioof 4.1 waste tonnes to ore tonnes in Q4 2020 reflects the impact of the commencement of development at Argyle.
Jan 14, 2021· The project envisaged open pit mining producing 121,000 oz/pa in years 1 to 8 (94,000 oz/pa LOM), at a strip ratio of 2.7:1 at a cash cost of US$721/oz using a gold price of US$1,450/oz and an exchange rate of C US$0.75/C$. About Moneta
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