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Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

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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. [1] [2] It is a number or ratio that express how much waste is mined per unit of ore.

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

Determining Stripping Ratio - Basic Mining Techniques

Stripping ratio simply refers to the amount of waste handled in order to recover certain amount of ore. It is mathematically expressed as the ratio of waste to ore. However a wide variety of units are used as well as indicated below: Hence the maximum allowable stripping ratio at pit limit is given as:

What Is a Stripping Ratio? (with picture)

The stripping ratio is commonly used in the ore and coal mining processes. 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

Stripping Ratios: What are They and Why are They

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...

stripping ratio in ore mining - supertouch.co.za

Stripping ratio and pit limit ~ Basic Mining Techniques Stripping ratio is expressed broadly as the ratio of waste to ore. Its simply calculating how much waste has to be removed to expose how much of ore

The boundary stripping ratio in ore mining SpringerLink

Mosinets, V.N., Khodinov, A.S. The boundary stripping ratio in ore mining. Soviet Mining Science 9, 166–168 (1973). https://doi.org/10.1007/BF02506182. Download citation. Received: 22 September 1971. Published: 01 March 1973. Issue Date: March 1973. DOI: https://doi.org/10.1007/BF02506182

mining engineering: STRIPPING RATIO (S)

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.

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

For open pit mining the costs are $0.40/ton ore and a stripping cost of $0.50/ton of waste. SR = (3.00 –0.40)/0.50 = 5.2 tons of waste/ ton of ore i.e. while the stripping ratio is less than 5.2 it is most economical to mine the deposit by open pit.

Mining Terms - kau

Spoil: is the overburden or non-ore material removed in gaining access to the ore. Stripping: is the removal of overburden. Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed.

What Is a Stripping Ratio? (with picture)

21/02/2021  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. As can be seen, when the 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. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ...

Stripping Ratio Question : mining

Correct, in hard rock mining the ratio is tonnes of waste to tonnes of ore. With an outcropping deposit the first few benches can have a stripping ratio of less than 1 (it's always compared to 1 tonne of ore). It can be a little different in open cut coal mining - strip mining, in particular. They use a ratio of cubic metres (yards or feet) to a tonne of coal. Strip mining is a volume (of ...

(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 Stripping Ratio as a Fundamental • Ability to surface mine depends on ...

Mining Terms - kau

Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed. Toe: is the base of a bank bench or a slope. Waste Dump : is a place were waste materials are piled.

Underground Mining Methods and Equipment

employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation. Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits. Considerations include: 1. Spatial/geometric ...

New guidance on accounting for stripping activities – a ...

between normal mining activities and a stripping activity. Management will need to identify the associated component of the ore benefiting from the stripping activity; and setting up the amortisation calculations, which will be more complex than what many companies are used to. Given the increased involvement of management and the data gathering exercise, implementation will be costly for many ...

Surface mining planning and design of open pit mining

09/01/2016  At a price of $2.25 per kg of copper, the breakeven stripping ratio from Fig. 3 is 1.3: 1. 2 February 2016 Prof. Dr. H.Z. Harraz Presentation Mining Methods, Surface mining 62. The line for the pit limit was found using the required pit slope and located at the point that gave a waste: ore ratio of 1.3:1. At the limit On the left side of the ...

METHODS OF ORE RESERVE ESTIMATION_EXAMPLE -

18/08/2019  Alluvial Mining Avoca Cash flow Cut-off-grade Downloads Dredging Gold Incremental cut off grade (ICOG) Instantaneous stripping ratio JORC Codes Logic Mill cut off grade (MCOG) Mine Ventilation Mineral Resources Authority Mining Mining Economics Mining Engineering Mining in PNG Mining method Net Present Value Open Pit Mining Ore Grade Ore ...

Economic Surface Mining of Multiple Seams

mining (or any other mining) is usually complicated and involves many variables. For surface coal mining some of the variables are as follows: Physical variables (i) Ratio of overburden to ore. (ii) Ratio of overburden and parting to ore. (Ui) Depth of overburden. (iv) Thickness and variability of ore seam(s). (v) Parting thickness.

Stripping Ratios: What are They and Why are They

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 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.

12_Stripping Ratios Pit Limits - Introduction to

2 Stripping Ratios: Waste units/Ore units Stripping Ratios 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 most commonly expressed as: (tons) Ore (tons) Waste SR = A wide variety of other units are used as well.

of stripping ratio in coal mining - bass-immobilien.ch

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 31 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

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

02/03/2010  3.2.5: Instantaneous Stripping Ratio. The stripping ratio (SR) refers to the amount of waste material that must be removed for a given amount of ore. 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 ...

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 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 SMEs Surface Mining were specifically referenced

Stripping Ratio Question : mining

Correct, in hard rock mining the ratio is tonnes of waste to tonnes of ore. With an outcropping deposit the first few benches can have a stripping ratio of less than 1 (it's always compared to 1 tonne of ore). It can be a little different in open cut coal mining - strip mining, in particular. They use a ratio of cubic metres (yards or feet) to a tonne of coal. Strip mining is a volume (of ...

Mining Production Activities - Extractives Hub

The process of pre-stripping is the removal of overburden to expose ore, before mining of ore commences. Pre-stripping costs are considered as part of the capital expenditure to open the mine. Once ore is being mined, stripping of waste continues but pre-stripping is complete. Pre-stripping is included in calculation of stripping ratio. Rock, both ore and waste, close to surface, may be softer ...

Underground Mining Methods and Equipment

employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation. Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits. Considerations include: 1. Spatial/geometric ...

New guidance on accounting for stripping activities – a ...

between normal mining activities and a stripping activity. Management will need to identify the associated component of the ore benefiting from the stripping activity; and setting up the amortisation calculations, which will be more complex than what many companies are used to. Given the increased involvement of management and the data gathering exercise, implementation will be costly for many ...

12_Stripping Ratios Pit Limits - Introduction to

2 Stripping Ratios: Waste units/Ore units Stripping Ratios 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 most commonly expressed as: (tons) Ore (tons) Waste SR = A wide

stripping ratio in coal mining

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 Ratio Question : mining

Correct, in hard rock mining the ratio is tonnes of waste to tonnes of ore. With an outcropping deposit the first few benches can have a stripping ratio of less than 1 (it's always compared to 1 tonne of ore). It can be a little different in open cut coal mining - strip mining, in particular. They use a ratio of cubic metres (yards or feet) to a tonne of coal. Strip mining is a volume (of ...

Lecture 4 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 SMEs Surface Mining were specifically referenced

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 grade to profitable high grade. Removal of material with a low ...

IFRIC 20 — Stripping Costs in the Production Phase of a ...

26/08/2010  In surface mining operations, entities may find it necessary to remove mine waste materials ('overburden') to gain access to mineral ore deposits. This waste removal activity is known as 'stripping'. There can be two benefits accruing to the entity from the stripping activity: usable ore that can be used to produce inventory and improved access to further quantities of material that will be ...

Underground Mining Methods and Equipment

employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation. Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits. Considerations include: 1. Spatial/geometric ...

INCREMENTAL OPEN-PIT MINING OF STEEPLY DIPPING ORE

quarries increases, the current stripping ratio increases. In the course of lowering mining operations, the overburden amount increases and reaches a maximum at the time when the loading face approaches the upper final pit boundary on the surface. One of the critical points in the operation of the quarry is the period when mining operations reach the designed pit limits on the surface. This ...

New guidance on accounting for stripping activities – a ...

between normal mining activities and a stripping activity. Management will need to identify the associated component of the ore benefiting from the stripping activity; and setting up the amortisation calculations, which will be more complex than what many companies are used to. Given the increased involvement of management and the data gathering exercise, implementation will be costly for many ...

Karara Iron Ore Mine - Mining Technology Mining

The mine will have a 0.38:1 waste to ore stripping ratio. A trial mining project was carried out in December 2010 based on the Karara South and Karara East DSO deposits. The Karara East was bought into production in the same month. First shipment of hematite from the mine occurred in March 2011. The first commercial shipment of 58t of hematite direct shipping ore occurred in October 2012 ...