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3.2.6: Maximum Allowable Stripping Ratio (SRmax) Earlier in this lesson, we looked at the maximum stripping ratio, and we did it for coal seam. You will recall that the maximum allowable stripping ratio, SR max, also called break-even stripping ratio, is the maximum amount of overburden/waste that can be extracted per unit of ore at the ...
Stripping Ratios, Pit Limits & Cutoff Grade Optimization. Download. Related Papers. Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. By Raul Cezar.
Chapter 2 The Environmental Effects of Strip Mining The. The debate on global warming for example could affect the use of coal in mines are routinely six of seven times higher than in larger operations even in A major factor is the stripping ratio that is the amount of overburden material to be When blasting is required to break up rock formations special precautions in This handbook on ...
For conducting a mining project's break even analysis, you first need to know about the operational expenses (OPEX).When the OPEX is known, you can calculate the mineral's cut off grade, which is the break even grade, below which it is not economically viable to mine the ore.To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isn't available, I refer you ...
Mining will proceed by advancing into the hillside until reaching the break-even stripping ratio. At this point, the highwall will remain. Under certain conditions, we may choose to take advantage of the exposed coal seam, and develop an underground mine or practice highwall mining, which will be discussed later in this lesson.
Assume an underground mining cost of $25.5/ton ore for an orebody. Assume open pit mining costs at $0.0028/kg ore removal and $0.0035/kg waste removal. Determine the stripping ratio for an open operation that results in break-even cost differential between the two mining methods. Question 21.
a. SR measures the amount of waste that needs to be removed to get an amount of ore, just as we mine it. Note the "amount"! b. This will differ depending on time span under consideration. * Initial studies (feasibility) – overall stripping ratio. * Current month – incremental stripping ratio.
For example, if stripping ratio is 4:1, it signifies that for mining 1 tonne of ore, it requires 4 tonnes of waste rock. Following are different types of stripping ratios that are used: i) Volumetric / Geometric stripping ratio. ii) Break-even stripping ratio. iii) Limiting stripping ratio. iv) Instantaneous stripping ratio
· Stripping ratio is a 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. 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.
effect of stripping ratio in coal mining. Stripping ratio Wikipedia. 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 … Get More
Examples of stripping ratios. Ioannou gave some examples of mines with good strip ratios, including Lundin Mining's (TSX:LUN) Candelaria copper-gold-silver mine in Chile at …
Break Even Stripping Ratio(BESR)/Maximum Stripping Ratio(SR max)/Cut off Stripping Ratio : This is defined as that stripping ratio at which cost of mining one tonne of ore & corresponding volume of waste material equals the revenue received by sale of one tonne of orebody OR when cost of mining ore & waste matches with revenue generated by sale ...
Examples of stripping ratios. Ioannou gave some examples of mines with good strip ratios, including Lundin Mining's (TSX:LUN) Candelaria copper-gold-silver mine in Chile at 2.8:1, and Copper ...
total number of injuries in an o/c coal mine employing 800 person is 16 in a year.as per dgms norms the injuri rate per 1000 person employed is. 13. 16. 20. 57. ... cost of mining excluding stripping cost is Rs 2450 per tonne if the cost of stripping is Rs 1150 per meter cube the break even stripping ratio …
Mine age of fixed BESR is 10 years. As dynamic BESR give total coal reserve 65.297.477 ton with NPV USD 826.886.944,92, IRR 85% and pay back period 1 year 7 month with 11 years of mine age. Kata Kunci : Break Even Stripping Ratio (BESR), Desain Pit, …
Break Even Stripping Ratio Example For Coal Mining. Effect of stripping ratio in coal mining break even stripping ratio example for coal mining break even stripping ratio example for coal mining accounting for stripping costs in the seem that it s value does not have any effect on the stripping ratio strip mining an overview sciencedirect topics.
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. Area strip mining
The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.
Surface Strip Coal Mining Handbook - sacea.za 1 introduction to surface strip coal mining 1.1 fundamental concepts and definitions 2 1.2 surface coal mining 5 1.3 production cost and stripping ratio analysis 8 1.3.1 stripping ratio for multiple seams 11 1.4 basic profit function analysis 13 2 geology and exploration 2.1 geology of south african coal …
Calculating Stripping Ratios for Area Strip Mines Mnge 315 ©Dr. B. C. Paul spring 2003 revised 2010 Note – These notes contain information considered common knowledge to those familiar with Strip Mining. Books such as "Elements of Practical Coal Mining" and SME's "Surface Mining" were specifically referenced fStripping Ratio as a ...
- Estimated Break Even Stripping Ratio (BESR) for Coal Surface Mining - Evaluated and Review Yearly Plan Forecast Unit Equipment Production Overburden and Coal - Evaluated and Review Yearly Plan Mining Sequence (pit and disposal) for Overburden and Coal based on Stripping Ratio
break even striping ratio - crusher equipment. break even stripping ratio example for coal mining CachedMining definition of Mining in the Free Online Encyclopedia.
If the break-even stripping ratio remains favorable, 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. Area strip mining
The stripping ratio is commonly used in the ore and coal mining processes. ... if the mining company must extract one part of ore to three and a half parts of waste in order to break even, it stands to reason that the company will seek to look for mining sites where it can extract at least one part of ore to two and a half parts of waste in ...
Lecture 4 Calculating Stripping Ratios for Area Strip . overburden costs 45 cents per cubic yard to move what is the maximum economic stripping ratio $5.00/ 0.45 = just over 11 cubic yards per ton Called a Break Even Stripping Ratio Complexities Warning Units of Stripping Ratio depend on convenience of the industry Coal overburden is normally light and machines are limited by volume in cubic ...
The stripping ratio in a mine is chosen based on economics. ... Thus you may have a range of stripping ratios from 1:1 to 1:15 or even more. ... for example…
The break-even stripping ratio is a function of ore value and the costs involved. 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.
Quarry Mining Aggregate Financial Plan; Break Even Stripping Ratio Example For Coal Mining; Method Statement For Clearing A Blocked Mobile Jaw Crusher; Income Statement For A Crushing Plant; Screening And Crushing Work Method Of Statement; Example Non Central Grinding Machine; Crushing Milling Method Statement
What Is a Stripping Ratio with picture. Dec 04 2019 · Stripping ratio is a term that is derived from the mining industry and is used in reference to the openpit mining process The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process
1.3 BREAKEVEN STRIPPING RATIO The point beyond which the mineral/ coal cannot be economically extracted out is called the break even stripping ratio. Factors which play a great role in the stripping ratio calculation are: - Cost of stripping - Extracting cost of mineral/coal - Percentage of rejects - Cleaning cost of coal or ore dressing cost
Some mining costs are fixed (many administrative features for example) Others are variable direct materials handling cost What goes into Break Even Stripping Ratio Direct materials costs go into Break Even Fixed Costs are charged to the average stripping ratio you mine over the time Simple Stripping Ratios Bottom of a Strip Mine Top of a Strip ...
Auger mining is a surface mining techniq ue used to recover additional coal from a seam located behind a highwall produced either by stripping or open-pit mining.
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