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## 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 three tonnes of waste rock. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ton of ore, for example, 1.5:1 as opposed to 3:2.

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• #### Determining Stripping Ratio Basic Mining Techniques

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.

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• #### Stripping Ratio Mineral Production Activities

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

• #### What Is a Stripping Ratio? (with picture)

Dec 04, 2020· 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 that must be moved in order to reach a certain ratio of ore.

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

Oct 31, 2018· Calculating stripping ratios At their most basic, strip ratios can be calculated by dividing overburden thickness by ore thickness. For example, an overburden thickness of

• #### Basic Mining Techniques

Basic Mining Techniques

• #### mining engineering: STRIPPING RATIO (S)

Jun 06, 2010· * We calculate the amount of waste that needs to be removed to get an amount of ore/coal . Miners Only Stripping ratio allows definition of this “breakeven” point. Switch to underground mining if your stripping ratio is more than BESR.

• #### How to calculate stripping ratio? ResearchGate

The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open-pit mining. It is commonly expressed as: SR=Waste (tons) ore (tons) A wide variety.

• #### Determining Stripping Ratio Basic Mining Techniques

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.

• #### Stripping ratio Wikipedia

In 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..

• #### Stripping ratio mining Britannica

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

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

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 SMEs Surface Mining were specifically referenced Stripping Ratio as a Fundamental

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

Yes, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

• #### Stripping Ratio Question : mining

Noob when it comes to mining, but always trying to learn more. If a company says they're producing 1MT at a stripping ratio of 3:1 does that mean the end product will be 1MT (I.e. Stripping ratio is taken into account beforehand)? Or do they get less than that 1MT after stripping ratio is taken into account.

• #### Problem 6.2 (from Page 178, Introductory Mining En

Problem 6.2 (from page 178, Introductory Mining Engineering) Calculate the maximum stripping ratio (SR.max = ?) and the overall stripping ratio (SRo = ?) for the open pit shown in Figure 2. given the following conditions: • Stripping Allowance: \$1.50/ton • Stripping Cost: \$0.25/ton • Pit Slope: B = 65° • Berm at top of ore: a = 30 ft • Surface inclination: 25° • Dip of bed: a = 0

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

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.

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

Jan 09, 2016· vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

• #### Definisi Pertambangan Pertambangan

BESR-2 untuk menentukan maksimal berapa ton waste yang disingkirkan untuk memperoleh 1 ton ore agar tahap penambangan ini masih memberikan keuntungan (max allowable stripping ratio) dan untuk menentukan batas pit (pit limit).

• #### TV:BIP Ratio Explained: The Economics of Oil Sands Mining

The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.

• #### Break-even stripping ratio Britannica

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.

• #### Surface Mine Reserves

The program will first determine the lowest Instantaneous stripping ratio in the calculation area. The program will then determine in which direction the stripping ratio increases the least. If mining were to start in the area of lowest stripping ratio and then move one grid node in the direction of least increasing stripping ratio, the

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

The Allowable Stripping Ratio (ASR) characterizes the maximum scope of stripping which is practicable in OP operation. The ratio stated in terms of m3 of waste per ton of the mineral can be determined in accordance with the relation 3. w ug op C C C ASR − = (3) Where, Cug: full prime cost of 1 ton of the mined mineral via underground (Dollars);

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

Strip Ratio = OB Thickness (in ft) * 11.11/Coal thickness in inchesAssumes 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

• #### 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

• #### mining engineering: STRIPPING RATIO (S)

Jun 06, 2010· * We calculate the amount of waste that needs to be removed to get an amount of ore/coal . Miners Only Stripping ratio allows definition of this “breakeven”

• #### What is stripping ratio in mining? Quora

- Quora 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.

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

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:.

• #### Stripping Ratio Question : mining

Noob when it comes to mining, but always trying to learn more. If a company says they're producing 1MT at a stripping ratio of 3:1 does that mean the end product

• #### Problem 6.2 (from Page 178, Introductory Mining En

Problem 6.2 (from page 178, Introductory Mining Engineering) Calculate the maximum stripping ratio (SR.max = ?) and the overall stripping ratio (SRo = ?) for

• #### Understanding Iron Ores and Mining of Iron Ore IspatGuru

Apr 03, 2015· The stripping ratio is the amount of overburden and waste that has to be handled for each unit of ore mined.

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

Jan 09, 2016· vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.

• #### Topic 5: Mining Methods-Part I-Surface mining

Nov 02, 2011· Strip-mining: Blast, scoop off rock overburden, and then scoop out ore material. Fairly shallow. Economics of strip mining depend on stripping ratio Large land area can be involved, especially for coal and bauxite. Strip mining. Example: Alcoa’s Sierra de Bahoruco Aluminum mining in D.R. Southern Peninsula until 1985 39.

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

Oct 01, 2013· Another relevant concept is the allowable stripping ratio Rad, which is defined upon the consideration of a minimum profit (Lmin) that must always exist, and it is given by (5) R ad = T U V − M − B − F P − L min E

• #### ECONOMIC ASSESSMENT AND MINE PRODUCTION

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.

• #### Surface Mine Reserves

The program will first determine the lowest Instantaneous stripping ratio in the calculation area. The program will then determine in which direction the stripping ratio increases the least. If mining were to start in the area of lowest stripping ratio and then move one grid node in the direction of least increasing stripping ratio, the

• #### Problem #2: Given The Following Information, Calcu

Problem #2: Given the following information, calculate a) The breakeven stripping ratio for ore vs. waste in a surface mining operation b) The breakeven stripping ratio for surface vs. underground. c) What happens to the breakeven stripping ratio for surface vs. underground if the underground mining costs increase by \$1.00/ton-ore?