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Jul 29 2022The calculation formula for the economic stripping ratio of a single useful component ore deposit is as follows {N} {mathrm {j}}=frac {eta 1^ {prime}left {B} 1 aright {eta} {mathrm {d}}^ {prime}left {B} {mathrm {d}} cright } {b}cdot r 7
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Calculation Of Boundary Stripping Ratio Errors At The Calculation of boundary stripping ratio errors at the stage of quarries designing selyukov alexei ryb r radim abstract the open pit mining method of solid minerals extracting is widely used both in russia and in the whole world and setseneral direction of mining industry development as its main tool at least for the next decades
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fThe Coal Area Strip Mine Formula Strip Ratio = OB Thickness in ft / 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 fYour Turn Use What You Have Learned About Calculating Stripping Ratios for Strip
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Abstract and Figures surface mining methods open pit planning and design open pit terminology stripping ratio factors governing strip mining calculation of overburden ratio initial data
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In surface mining stripping ratio or strip ratio refers to the amount of waste or overburden that must be removed to release a given ore quantity [1] [2] It is a number or ratio that express how much waste is mined per unit of ore The units of a stripping ratio can vary between mine types
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How do you calculate stripping ratio At their most basic strip ratios can be calculated by dividing overburden thickness by ore thickness For example an overburden thickness of 100 meters and an ore thickness of 50 meters would yield a strip ratio of 2 1 That means mining 1 cubic meter of ore would require mining 3 cubic meters of overburden
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For example the current maximum depth for underground coal mining is between an analysis using a break even economic hurdle and inclusion of at least 1 or 2 percent profit to technically meet the definition of reserves is minor especially for evaluations extensive very stripping ratio in coal mining 2024 10 5 · Stripping Ratio Calculation
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Stripping cost = Waste unit cost $/t x Waste tonnes t The operating production cost includes the cost of mining milling general and administration G A Some additional costs are considered like refining selling amortization depreciation and mostly depend on the commodity mined and the management decisions
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Oct 21 2022This content was COPIED from View the original and get the already completed solution here Given an underground total mining cost of $ per tonne surface mining costs of $ per tonne of ore and surface mining stripping costs of $ per tonne of waste calculate the break even stripping ratio with zero profit between surface and underground mining
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After going through this lecture you will be able to 1 list and define stripping ratios K C 2 calculate various stripping ratios for given situations C Ap 3 explain the influence of stripping ratios on planning decisions A S 4 assess the most economic method of mineability of a deposit by surface mining or underground mining from
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stripping ratio calculation in mining Stripping ratio In mining stripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material required to be handled in order to extract some tonnage of example a 3 1 stripping ratio means that mining one tonne of ore will require mining
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Break even point = Fixed cost / contribution margin ratio Contribution margin ratio = Sales price variable cost sales price Contribution margin ratio = 4 3 / 4 = 25% Break even point
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The strip ratio is calculated by dividing the thickness of the overburden by ore thickness Eg if the overburden is 100m thick and the ore is 50m the strip ratio is 2 1 The lower
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In mining stripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material required to be handled in order to extract some volume of ore For example a 3 1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock Stripping ratios are typically reduced to show the volume of waste removal required to
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How do you calculate the stripping ratio cd ratio calculation Mining 3 697 CONTRIBUTIONS I am a curious stripping ratio iron ore Know More Apr 27 2024 0183 32 stripping ratio iron ore Posted at April 27 For example a 3 1 stripping ratio means that mining one cubic meter of ore will require mining three
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In mining stripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material required to be handled in order to extract some volume of ore For example a 3 1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock
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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 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 Application of Surpac and Whittle Software in Open Pit
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Coal surface mining and reclamation costs in Appalachia are estimated as a function of reclamation quality the angle of natural terrain and the overburden to coal stripping ratio When mining to a maximum stripping ratio of 20 the cost of providing minimally acceptable or basic reclamation is estimated to be and of
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The IFRS Interpretations Committee considered a revised draft Interpretation on this topic and discussed 1 the recognition principle 2 the method of allocating costs between current and future periods 3 impairment 4 transition 5 the treatment of existing stripping costs assets 6 removal of the illustrative example
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Andrew P Schissler in Encyclopedia of Energy 2024 Strip Mining Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips The pits are parallel and adjacent to each other Strip mining is fundamentally different from contour or area mining on how the overburden is displaced called spoil handling
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the dcp test is carried out measuring the penetration depth of a cone tip 60° cone angle 20 mm diameter after each drop of a 8 kg mass hammer from an height of 575 mm penetration index pi is calculated as the ratio of depth and blow count and is then related to cbr with log log equation in the following general form 4 log cbr = a b · …
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See answer 1 Copy We divide the overburden thickness by ore thickness to get the stripping ratio For example if we have an overburden thickness of 80m and ore thickness of 50 m then
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Jun 23 2021Return on equity ROE is a key financial indicator considered by investors because it indicates the level of profit a company can generate from equity and return to stockholders Average ROEs in
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In United States dollars except where noted otherwise TORONTO Oct 25 2024 GLOBE NEWSWIRE First Quantum Minerals Ltd First Quantum or the Company TSX FM
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Mar 25 2021The stripping ratio analysis features the use of allowable stripping ratio ASR planned by mine management for the OP mine and overall stripping ratio OSR computed per depth for the OP mine to determine the transition depth [56 57] The stripping ratio is expressed by this relation with emphasis on exploitation cost of 1 tonne of ore in UG mining and in OP mining as well as removal cost
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Books such as Elements of Practical Coal Mining and SME s Surface Mining were specifically referenced Stripping Ratio as a Fundamental • Ability to surface mine depends on the value of the ore being high enough to offset the cost of Overburden Removal Stripping Ratio determines relative amounts of each to be moved • If coal generates a $5/ton earning and Determining
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Break even stripping ratio The instantaneous stripping ratio at the point where the cost of stripping the waste exactly equals the value of the ore uncovered Stripping Ratio Example It will be assumed that the pit is deepened in bench height increments of 25 ft the minimum pit width is 100 ft overall slope angle is 45° the density of the ore and waste is the same the ore is of constant
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※stripping ratio calculation in mining chidliak Strip Ratio The above chart shows how the strip ratio changes for both CH6 and CH7 between a pit wall angle of 45 degrees all the way up to 70 degrees It clearly shows the benefit of having a higher pit wall angle The lower strip ratio the lower amount of waste material to move and this will
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The reduction ratio R in rod mills varies from 2 and 20 depending on the characteristics of the ore The usual reduction ratio is about 8 According to Bond 4 the reduction ratio is a function of length and diameter of the mill The optimum reduction ratio R RO can be written as How To Calculate Size Reduction Ratiocalculate the reduction ratio of ball mill This indicates that the rod mill
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mining stripping ratio stripping ratio calculation in mining In mining stripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material required to be handled in order to extract some tonnage of ore For example a 3 1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock More
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