### Determining Stripping Ratio - Basic Mining Techniques

04-04-2016 · 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

### Stripping ratio and pit limit - Basic Mining Techniques

26-07-2017 · The units for stripping ratios can vary and usually depends on the geological properties of the deposit and the commodity mined. It can be expressed in tonnes (t), or cubic meters (m 3).Usually for coal, cubic meters (m 3) or tonnes (t) are used.However, for hard rock mines where the geology is usually complex with the presence of various rock types, tonnage

### (PPT) Calculating Stripping Ratios for Area Strip Mines ...

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 ...

### Stripping Ratios: What are They and Why are They Important ...

30-10-2018 · Stripping ratios aren’t often discussed, but they can be an early and important indicator for mining projects. Here’s what investors should know about them.

### Stripping ratio - Wikipedia

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. 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. For example, in coal mining the stripping ratio is commonly referred to as volume/weight. Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight. A stripping ratio can

### (PDF) Stripping Ratios, Pit Limits & Cutoff Grade ...

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.

### mining engineering: STRIPPING RATIO (S)

06-06-2010 · 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.

### stripping ratio calculation in mining - tablesandthyme.co.za

stripping ratio calculation in 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 ore will require mining Read More

### How do you calculate the stripping ratio? - Answers

06-06-2009 · 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 the stripping ratio will be ...

### Whats the average stripping ratio of open pit mines around ...

31-08-2016 · Even if there was an average of ALL open pit mines that would not offer any knowledge regarding open pit mining. The stripping ratio in

### 3.2.5: Instantaneous Stripping Ratio | ABC 123: Testing ...

02-03-2010 · The Instantaneous Stripping Ratio (ISR) is the stripping ratio for a given push back, where a tiny slice of material, i.e., ore and/or waste, is removed from a pit wall. This section presents the ISR calculation for a steeply pitching deposit. Assume an idealized tabular and steeply pitching orebody that outcrops at the surface and dips to the ...

### 3.2.4: Step 2 -- How Much of the Resource is a Reserve ...

Thus the units for the stripping ratio will be yd3/ton. Two stripping ratios are used in the prefeasibility or feasibility analyses: overall stripping ratio and the maximum stripping ratio. As mine planning advances beyond the prefeasibility stage, stripping ratios at different cross sections will be calculated as well.

### What is stripping Ratio and how is it calculated? - Answers

12-11-2008 · It's a ratio of waste extracted at a mine and is expressed as: (Total extracted - Mineral for plant) / Mineral for plant -m0id.

### Calculating ultimate pit limits and determining pushbacks ...

01-08-2021 · The mining operation's cut-off grade is 0.20%, and the stripping ratio is 1.9. Fig. 11 shows the calculation for the optimal ultimate pit in the area called “Cerro Colorado”, with an area of 2.5 × 1.1 km 2 and a maximum depth of 300 m.

### (PDF) Surface Mine Design - ResearchGate

It should be noted here that a stripping ratio of 2 to1 means t hat there is twice as much waste rock mined as mineral (ore, coal, etc.). Two types of methods may be used in surface mining ...

### Whats the average stripping ratio of open pit mines around ...

31-08-2016 · Even if there was an average of ALL open pit mines that would not offer any knowledge regarding open pit mining. The stripping ratio in

### Surface mining planning and design of open pit mining

09-01-2016 · • Syncrude Tar Sands: SR = 1.2 - 1.4 • Highland Valley: SR ~0.5 • Bagdad mine: SR ~1.2 • Cortez mine: SR = 1.6 Examples: 2 February 2016 Prof. Dr. H.Z. Harraz Presentation Stripping Ratios Stripping ratio is defined as the ratio of the Overburden/Cover Rock / Waste Rock to the orebody. One of the ways of describing the geometrical efficiency of a mining

### Stripping Costs in the Production Phase of a Surface Mine

3 A mining entity may continue to remove overburden and to incur stripping costs during the production phase of the mine. 4 The material removed when stripping in the production phase will not necessarily be 100 per cent waste; often it will be a combination of ore and waste. The ratio of ore to waste can range from uneconomic low

### Easy profit maximization method for open-pit mining ...

01-10-2013 · The profit function can also be formulated in unit values (per ton or cubic meter of ore), by assigning a unit profit function L ′ ($/h), which is given by (2) L ′ = T U V − M − E R − B − F P. In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore T.It is therefore essential to determine what their ...

### Indian School of Mines Dhanbad

stripping, ratio and break-even stripping ratio, determination of quarriable limits, classification of surface mining systems based on geology of deposit and based on mechanization adopted, unit operations and associated equipment, applicability of simper, shovel-dumper and Dragline,

### 3.2.6: Maximum Allowable Stripping Ratio (SRmax) | ABC 123 ...

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 economic pit limit.

### Calculating ultimate pit limits and determining pushbacks ...

01-08-2021 · The mining operation's cut-off grade is 0.20%, and the stripping ratio is 1.9. Fig. 11 shows the calculation for the optimal ultimate pit in the area called “Cerro Colorado”, with an area of 2.5 × 1.1 km 2 and a maximum depth of 300 m.

### stripping method of mining - razoriteolivedale.co.za

Stripping Method Of Copper Mining - sreast.cz. Stripping Ratios: What are They and Why are They Important . Oct 31, 2018 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 overburden, that must be moved in

### Stripping Costs in the Production Phase of a Surface Mine

3 A mining entity may continue to remove overburden and to incur stripping costs during the production phase of the mine. 4 The material removed when stripping in the production phase will not necessarily be 100 per cent waste; often it will be a combination of ore and waste. The ratio of ore to waste can range from uneconomic low

### Net Asset Value in Mining | Sell Side Handbook

20-07-2017 · Also note the strip ratios for each year (this is the amount of waste rock that is mined while mining the ore). The total material moved is calculated by multiplying the strip ratio with the ore depleted, then adding the ore depleted. A strip ratio of 10x and a depletion of 4.5 Mtonnes equates to 49.5 Mtonnes of material moved.

### FASB Emerging Issues Task Force

mine stripping ratio," or a "stripping ratio," which is calculated as the estimated total number of units (for example, tons) of waste material mined during production divided by the estimated total proved and probable reserves contained within the mine (that is, recoverable ore in a unit of

### Indian School of Mines Dhanbad

stripping, ratio and break-even stripping ratio, determination of quarriable limits, classification of surface mining systems based on geology of deposit and based on mechanization adopted, unit operations and associated equipment, applicability of simper, shovel-dumper and Dragline,

### ANALYSIS OF AVAILABILITY AND UTILIZATION OF DRAGLINE

annually at high stripping ratios of up to 1 in 4 to 1 in 6, in Indian context. The walking draglines offer several merits in open pit mining project where long reach, deep digging and high output are essential requisites, at high stripping ratios. For instance, a 1 m coal seam may have 30 m thick over burden cover,

### Financial reporting in the mining industry International ...

10.1 Mining taxes—royalty and excise ..... 109 10.2 Mining taxes based on profits ... 16.8 Stripping costs in the production phase of a surface mine..... 148 16.9 Borrowing costs ...

### Calculation of Ore Tonnage & Grade from Drill hole Samples

21-01-2016 · d = 4a + b + c/6. Then, as one proceeds from hole to hole, b and c should be substituted, thus: 4b + a + c/6 and 4c + a + b/6, which will give the average depth of the ore in each hole. These formulas are derived as follows: which, in

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