### What is the maximum stripping ratio of open pit Diamond ...

In the manual method, a simple optimization of economic pit depth was usually carried out by hand calculator (or slide rule) for regular shaped orebodies using incremental cross-sectional areas, for ore and waste, and an overall pit slope. The incremental stripping ratio (the ratio of the tonnage of waste that must be moved to access the next

### 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 ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock.

### 24th clip Surface Mining (Stripping Ratio) - YouTube

Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: …calculated with the aid of stripping 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…

### PSEUDOFLOW EXPLAINED - Deswik

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 yards ...

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

Nov 22, 2016· Stripping Ratio And Quarriable Limit - Duration: 3:02. Surface Mining Technology 486 views. 3:02. Sensitivity Analysis for Financial Modeling Course ...

### Economic Assessment and Value Maximizations of a Mining ...

Jan 31, 2018· This analysis is performed in order calculate economic risk under different economic and operational scenarios. Results show that during the optimized 16-year of expected mine life, the mine will produce 21,000,000 tons per year of mineralized economic material with an average strip ratio …

### Break Even Stripping Ratio (BESR) Estimate

Air/Water Ratio • Air/water ratio flowing through the air stripper is extremely important in determining efficiency • It is dependent on the concentration and physical properties of the contaminant. One can look at the Henry's constant to determine the needed ratio. Typically a good first estimate is: A/W = 16,000*H C

### Air Stripping - Pennsylvania State University

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 range of stripping ratios from 1:1 to 1:15 or even more.

### Stripping Ratio | Mineral Production Activities ...

within the defined final pit limit. Often, as a result of this process, the mine operates at a higher strip ratio during the initial period and moves towards a lower strip ratio towards the end of the mine life. The impact of this is an annual production schedule that does not follow a sequence that maximizes the NPV.

### Stripping Ratio | Mineral Production Activities ...

IFRIC 20 considers when and how to account separately for the benefits arising from the removal of mine waste materials ('overburden') to gain access to mineral ore deposits, as well as how to measure these benefits both initially and subsequently. IFRIC 20 was issued on 19 October 2011 and applies to annual periods beginning on or after 1 January 2013.

### Limits on Business Interest Deductions Under the ...

Because the business' debt-to-equity ratio is 10:1 but Turkey's debt-to-equity ratio is 3:1, only 30 percent of the interest, or $1.5 of the $5, is tax-deductible. It is important to keep in mind that thin-cap rules not only limit international debt shifting but can also impact real economic activity, …

### ECONOMIC ASSESSMENT AND MINE PRODUCTION …

The stripping ratio 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.

### Determining Stripping Ratio - Basic Mining Techniques

explanation of the main operational parameters, and an economic evaluation of the project. In the economic evaluation, variables as the breakeven cutoff grade (BCOG), stripping ratio and optimal cutoff grade (OCOG) will be considered in order to determine the Net Present Value (NPV), Internal Rate of Return (IRR) and mine life.

### Stripping Ratio | Mineral Production Activities ...

This is why stripping ratio is such a crucial aspect of open pit design and of open pit mine management. Maximum economy is achieved with lowest stripping ratio, which in turn is achieved by the steepest possible safe pit slope. There is a safe limit to how steep the sides of a pit can be, and this is determined by slope stability.

### Economic Surface Mining of Multiple Seams

This is why stripping ratio is such a crucial aspect of open pit design and of open pit mine management. Maximum economy is achieved with lowest stripping ratio, which in turn is achieved by the steepest possible safe pit slope. There is a safe limit to how steep the sides of a pit can be, and this is determined by slope stability.

### Open pit scheduling features to improve project economy

Earnings stripping rules limit the ratio of debt interest to pretax earnings and have emerged more recently. Belgium, where our company's headquarters is located, has both rules in place. A 5:1 debt-to-equity ratio applies to intragroup loans, and interest deductions are limited to the higher of €3 million or 30 percent of EBITDA (Earnings ...

### Surface Mine Reserves - Carlson Software

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 ...

### 8.2mine Dilution Tutorial [8x4eox5ro8n3]

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 yards ...

### Stripping ratio | mining | Britannica

You need to estimate the area of economic coal and then on paper design this mine and estimate the reserves. Calculate the break even strip ratio for an Indonesian coal deposit using the following assumptions AMOUNT ACTIVITY (USD) Sale price FOB $80 Barge freight & loading

### Lecture 4 Calculating Stripping Ratios for Area Strip ...

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.

### The Economics Behind Thin-Cap Rules | International Debt ...

A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. It represents the amount of waste material, also known as overburden, that must be moved in ...

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

Jan 09, 2016· Fig. 2, Fig. 3 If the grade of ore changed as the pit limit line was moved, the breakeven stripping ratio to use would also change. The pit limits are established on the longitudinal section in the same manner with the same stripping ratio curves. The pit limits for the radial section are handled with a different stripping ratio curve, however.

### Lecture 4 Calculating Stripping Ratios for Area Strip ...

The report formatter will include two forms of stripping ratio: "Strip Ratio" and "Strip Ratio Accumulative". The latter term should not be confused with the Accumulative Stripping Ratio for the stripping ratio grid/contour output. Consider four strata layers: A, B, C, and D where stratum A and C are non-key while stratum B and D are key.

### Useful online formula for press tool design

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 ...

### An approach towards ascertaining open-pit to underground ...

Penelitian ini bertujuan untuk menentukan pit limit tambang yang optimal yang memberikan nilai ekonomis dalam tambang batubara. Penelitian terletak pada daerah Tamiang Layang, Kabupaten Barito Timur Propinsi Kalimantan Tengah pada wilayah Izin Usaha Pertambangan PT Senamas Energindo Mineral. Pit limit yang optimal dianalisis dengan menggunakan metode Break Even Stripping Ratio …

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

or economic considerations. From a physical standpoint, the capability of the stripping machine is the limiting factor. From the economic standpOint, the limiting factor is the familiar stripping ratio which is used in making a feasibility

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