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  • Stripping ratio and pit limit - Basic Mining Techniques

    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 (t) is usually preferred.

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  • What Is a Stripping Ratio? (with picture) - wiseGEEK

    31.03.2020  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 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 ...

  • Stripping Ratios: What are They and Why are They

    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 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 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

  • What is break even stripping ratio - Answers

    What is break even stripping ratio? Wiki User 2014-04-14 10:37:29. the stripping ratio fot the last increment alomg the pit wall. it determines whether one should continue mining using open. pit ...

  • 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.

  • Definisi Pertambangan Pertambangan

    Break Even Stripping Ratio (BESR) ... Strip Mine: Suatu system penambangan yang diterapkan untuk endapan bijih yang letaknya horizontal atau sedikit miring. Contoh : Tambang Batubara di Tanjung Enim Sumatera Selatan, Tambang Batubara di Ombilin Sawah Lunto Sumatera Barat mineralnya Bituminous Coal, dll. Alluvial Mine: Suatu system penambangan yang diterapkan untuk endapan alluvial. Contoh ...

  • Stripping Ratios, Pit Limits Cutoff Grade Optimization

    Stripping Ratios, Pit Limits Cutoff Grade Optimization

  • Definisi Pertambangan Pertambangan

    Break Even Stripping Ratio (BESR) ... Strip Mine: Suatu system penambangan yang diterapkan untuk endapan bijih yang letaknya horizontal atau sedikit miring. Contoh : Tambang Batubara di Tanjung Enim Sumatera Selatan, Tambang Batubara di Ombilin Sawah Lunto Sumatera Barat mineralnya Bituminous Coal, dll. Alluvial Mine: Suatu system penambangan yang diterapkan untuk endapan alluvial. Contoh ...

  • What is STRIPPING RATIO? What does STRIPPING

    24.08.2017  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 ...

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  • Break Even Analysis - How to Calculate the Cut Off

    Break Even Analysis – How to Calculate the Cut Off Grade For conducting a mining project’s break even analysis, you first need to know about the operational expenses (OPEX) . When the OPEX is known, you can calculate the mineral’s cut off grade, which is the break even grade, below which it is not economically viable to mine the ore .

  • How to calculate stripping ratio? - ResearchGate

    For instance: If the thickness waste rock (overburden) is 100m and the thickness of coal is 50m then stripping ratio would be 2:1. That means one m3 (cubic meter) of coal would need mining two m3 ...

  • ANALISIS BREAK EVEN STRIPPING RATIO UNTUK DESAIN PIT ...

    Mine age of fixed BESR is 10 years. As dynamic BESR give total coal reserve 65.297.477 ton with NPV USD 826.886.944,92, IRR 85% and pay back period 1 year 7 month with 11 years of mine age. Kata Kunci : Break Even Stripping Ratio (BESR), Desain Pit,

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

    22.11.2016  24th clip Surface Mining (Stripping Ratio) Viriyah Miner. Loading... Unsubscribe from Viriyah Miner? ... Open Cut Coal Mine Planning Scheduling Software - Duration: 4:38. RPMGlobal 10,111 views ...

  • 作者: Viriyah Miner
  • Coal mining - Wikipedia

    Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is a 'pit', and ...

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  • 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 ...

  • (DOC) ANALISIS STRIPPING RATIO DALAM MENENTUKAN

    ANALISIS STRIPPING RATIO DALAM MENENTUKAN SUATU METODE PENAMBANGAN BATUBARA DI AREA

  • Coal mining - Wikipedia

    Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is a 'pit', and ...

  • sbcollege

    sbcollege

  • 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 ...

  • (DOC) ANALISIS STRIPPING RATIO DALAM MENENTUKAN

    ANALISIS STRIPPING RATIO DALAM MENENTUKAN SUATU METODE PENAMBANGAN BATUBARA DI AREA

  • Mine wastes management - Mining and Blasting

    ratio varies with the area under mining. For example, stripping ratio of limestone in Himachal Pradesh is almost zero whereas in Rajasthan it is 0.308 (i.e. 300 kg of waste per tonne of limestone mined).11 The overburden ratio for surface mining of metal ores generally ranges from 2:1 to 8:1 depending on local conditions.12 The ratio for solid wastes from underground mining is typically around ...

  • Mining Article about mining by The Free Dictionary

    In strip mining, the soft overburden, or waste soil, overlying the ore or coal is easily removed. In open-pit mining the barren rock material over the ore body normally requires drilling and blasting to break it up for removal. A typical mining cycle consists of drilling holes into the rock in a pattern, loading the holes with explosives, or blasting agents, and blasting the rock in order to ...

  • (PDF) Economico-Mathematical Analysis of Transition

    The break even stripping ratio is calculated fo r the point at which break-even occurs and the necessary stripping is paid for by the net value of the ore removed. Generally, the break even

  • POWDER RIVER BASIN COAL RESOURCE AND COST STUDY

    POWDER RIVER BASIN COAL RESOURCE AND COST STUDY Campbell, Converse and Sheridan Counties, Wyoming Big Horn, Powder River, Rosebud and Treasure Counties, Montana Prepared For XCEL ENERGY By John T. Boyd Company Mining and Geological Consultants Denver, Colorado Report No. 3155.001 SEPTEMBER 2011 Exhibit No. MWR-1. John T. Boyd Company Mining and Geological

  • Mining in Indonesia - PwC

    Mining Law Law on Mineral and Coal Mining No.4 of 2009 MoEMR Minister of Energy and Mineral Resources MoF Minister of Finance MoT Minister of Trade MW Mega Watt NPWP Nomor Pokok Wajib Pajak (Tax Payer Identification Number) PBB Pajak Bumi dan Bangunan (Land Building Tax) PE Private Equity PER 47/2015 Peraturan Direktur Jendral Pajak (DGT Regulation) [Reference

  • Chapter 2: The Environmental Effects of Strip Mining - The ...

    Strip mining handbook - Natural Resources Law Center/Red Lodge Clearinghouse ... This process continues along parallel strips of land so long as the ratio between the overburden and the coal seam, called the stripping ratio, makes it economically feasible to recover coal. Mining may cease in a particular area, for example, where the coal seam becomes thinner or where the seam dips further ...

  • Mining in Indonesia - PwC

    Mining Law Law on Mineral and Coal Mining No.4 of 2009 MoEMR Minister of Energy and Mineral Resources MoF Minister of Finance MoT Minister of Trade MW Mega Watt NPWP Nomor Pokok Wajib Pajak (Tax Payer Identification Number) PBB Pajak Bumi dan Bangunan (Land Building Tax) PE Private Equity PER 47/2015 Peraturan Direktur Jendral Pajak (DGT Regulation) [Reference

  • Chapter 2: The Environmental Effects of Strip Mining - The ...

    Strip mining handbook - Natural Resources Law Center/Red Lodge Clearinghouse ... This process continues along parallel strips of land so long as the ratio between the overburden and the coal seam, called the stripping ratio, makes it economically feasible to recover coal. Mining may cease in a particular area, for example, where the coal seam becomes thinner or where the seam dips further ...

  • Surface mining planning and design of open pit mining

    • 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 operation is through the use of ...

  • Strip Mining - an overview ScienceDirect Topics

    Strip mining for copper, for example, produces large quantities of tailings that often contain concentrations of ~ 100 to < 10,000 mg kg –1 of such metals as arsenic, cadmium, and lead. Similarly, iron pyrites (FeS 2 ), which are often associated with copper, silver, and lead ores, can have a devastating impact on the aquatic environment because their oxidation releases sulfuric acid into ...

  • VENTILATION PLANNING LAYOUTS FOR LARGE OPENING MINES

    blowing into a new mine that uses the split-mine ventilation system. Figures 4 and 5 show how a split-mine is expanded over time. As the mine increases in size, around 10 breaks in, a large-diameter low-pressure fan can be installed in a bulkhead to create a consistent airflow output without damaging the bulkhead from blast pressure (Figure 6)

  • 1.1 PHASES OF A MINING PROJECT - Home ELAW

    of overburden generated by mining is enormous. The ratio of the quantity of overburden to the quantity of mineral ore (called the ‘strip ratio’) is usually greater than one, and can be much higher. For example, if a proposed mining project involves the extraction of 100 million metric tons of mineral ore, then the proposed mining project

  • 05_GEO3141+MINE_2810_Coal_Mining_2017.pdf - Coal

    View 05_GEO3141+MINE_2810_Coal_Mining_2017.pdf from MINE 2810 at University of New South Wales. 8/30/2017 Coal Mining Geos3141 Mine_2810 2017 References References: AusIMM Monograph 12 Australian

  • MENGHITUNG CADANGAN BATUBARA MINING ARCHIVE

    Beberapa parameter ekonomi yang diperlukan untuk penentuan stripping ratio yang masih ekonomis (Break Even Stripping Ratio), adalah : II.1.3 Faktor-Faktor Pembatas Dalam Penentuan Cadangan Tertambang Seperti yang telah diuraikan sebelumnya, bahwa tidak mungkin akan diperoleh cadangan tertambang 100% dari cadangan insitu, dimana akan terjadi dilution sepanjang tahap penambangan.

  • Corporate income taxes, mining royalties and other mining ...

    Rent Tax applies to bulk commodity projects for coal and iron ore operations, ... generous other tax incentives to encourage mining development. For example, Canada allows “fl ow through shares” which is a viable alternative to fi nancing mineral resource ventures. Flow through shares are shares issued by a corporation to taxpayers pursuant to an agreement under which the issuing corpora

  • Key Financial Ratios to Analyze the Mining Industry

    The mining industry is one of the oldest established industrial operations. Mining has been critical to the development of major countries, such as the U.S., Canada, and Australia. The entire ...

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    The materials of processing: *

    • Granite
    • Limestone
    • Basalt
    • Pebble
    • Gravel
    • Gypsum
    • Marble
    • Barite
    • Quartz
    • Dolomite
    • Gold Ore
    • Copper ore
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