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  • 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. . Whereas in metal mining, stripping ratio is unitless and is expressed as weight/weight . A stripping ratio can be expressed as a ratio or as a number.

  • What Is a Stripping Ratio? (with picture)

    04.12.2020· The stripping ratio is commonly used in the ore and coal mining processes. The stripping ratio is important due to the fact that it helps a mining company assess a mining site in order to determine the profitability before committing any resources to the mining process. A way of describing the concept of stripping ratio is by looking at it in terms of the level at which the mining process will cease

  • Stripping Ratios: What are They and Why are They

    31.10.2018· 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

  • 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

  • Stripping Ratio Question : mining Reddit

    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 waste) management problem hence the focus in the stripping ratio.

  • (PDF) Stripping Ratios, Pit Limits & Cutoff Grade

    In strip coal mining operations, the following are sometimes seen: Overbuden Thickness (ft) Overburden (yd 3 ) SR = SR = Coal Thickness (ft) Coal (tons) Stripping Ratios Instantaneous stripping ratio: The stripping ratio for a given push back Overall stripping ratio: The stripping ratio for the total amount of material removed. Break-even stripping ratio: The instantaneous stripping ratio at the point where the

  • 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...

  • stripping ratios coal auxpatesfraiches

    coal mining stripping ratio cad-housecoza In coal mining what is a good strip ratio answers * Consider Capital Quarries, Rolla, at 25 m depth, SR = 05 b To surface mine we need to remove some waste in addition to ore / coal c SR measures how much waste needs to be removed so that a unit of ore/coal can be mined. Get Price . Lecture 4 Calculating Stripping Ratios for Area . Deze pagina

  • 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.

  • LAND DEGRADATION DUE TO MINING AND ITS REMEDIAL

    The country is even planning for production from 300 m depths at stripping ratio of 1:15 for D and F grade quality of coal. If these mines were operational, it would mean that even if 1 million tonnes of coal were extracted, it would generate 15 million tonnes of waste material.

  • 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 the orebody below surface. The unit cost of mining may increase over the life of a pit due to increased stripping ratio and the longer

  • 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.

  • 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

  • in coal mining what is a good strip ratio

    Stripping ratio in coal 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. Get Price

  • What is stripping ratio in mining? 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. For example, a 3:1 stripping ratio means that mining one tonne of ore wil...

  • stripping ratios coal auxpatesfraiches

    coal mining stripping ratio cad-housecoza In coal mining what is a good strip ratio answers * Consider Capital Quarries, Rolla, at 25 m depth, SR = 05 b To surface mine we need to remove some waste in addition to ore / coal c SR measures how much waste needs to be removed so that a unit of ore/coal can be mined. Get Price . Lecture 4 Calculating Stripping Ratios for Area . Deze pagina

  • LAND DEGRADATION DUE TO MINING AND ITS REMEDIAL

    The coal mines of Coal India Limited (CIL) removed about 500 million cubic m (Mcum) of overburden (OB) to produce 260 mt of coal in 2003-04 at an average stripping ratio of 1.92 cu m of OB against per tonne of coal production [4]. As demand for coal increases to meet the country’s energy requirement, the coal companies are

  • Economic Surface Mining of Multiple Seams

    mUltiple-sewn strip-mining industry seems as favorable as Iltat predicted for the entire industry. A TYPICAL MULTIPLE-SEAM SURFACE COAL MINE Using a walking dragline and an electric sboveJ in tandem, Peabody Coal Company. at its Homeslead Mioe in Ohio County, Kentucky, has developed a method of recovering three seams. These seams are the Kentucky No. 9, No. 11 and No. 13. Data on

  • Surface Coal Mining Methods in Australia IntechOpen

    Open cut mining methods strip mining Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significan t developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and operating at higher stripping ratios (Westcott et al., 2009). The following major equipments

  • Major Mines & Projects Moatize Mine

    Seams consist of bright coal, mainly vitrinite, alternating with dull detrital coal, carbonaceous shale and shale. The shale to coal ratio in the Chipanga seam is in the order of 60/40. The Chipanga Seam is economically the most important of the coal seams, as it is thicker and laterally more extensive and therefore has the largest reserves.