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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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 fStripping Ratio as a ...

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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.

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Strip mining is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden); this activity is also referred to as overburden removal.It is most commonly used to mine coal and lignite (brown coal).Strip mining is only practical when the ore body to be excavated is relatively near the surface and/or is mostly horizontal.

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The second metric is applicable to shallower deposits that are being evaluated for surface rather than underground mining, and it is known as the stripping ratio. Let's start with stripping ratios, and let's use a shallow coal seam for our example. Stripping Ratios. The coal seam will be underneath layers of …

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a) [10] Determine the overall stripping ratio of a typical panel after panel (1). You may simplify the geometry if necessary. b) [5] how do you plan to mine the coal at the right bottom comer labeld "A"? Show your plan if necessary c) [10 Select one fleet proper equipment for overburden remoal and coal production and specify their operation cycles.

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The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material is known as stripping ratio. Coal mining companies in India removed about 1058.874 million cubic meters (Mcu.m) of overburden (OB) to produce 504.195 million tons of coal in 2012-13 at an average stripping ratio of 2.12 of over

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In strip coal mining operations, the following are sometimes seen: (ft) Thickness Coal (ft) Thickness Overbuden SR = (tons) Coal) (yd Overburden SR 3 = 3 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.

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Historically, creating bench on a hill was by carrying the spoil down using a shovel. The stripping ratio if remains favorable the method will be continued. On the contrary, if there are sufficient reserves of ore under the knob the hill, the mining then will be underground mining. Area Strip Mining Area Strip Mining (Courtesy : farm8 ...

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A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

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Mine Planner (Planning & Design) Preparation of Mining Plans (MP), Mine closure Plans (MCP), Project reports (PR), Detailed project Report (DPR), Conceptual Note, Mine feasibility Studies, Surface Miner's reject Calculation, OB contractual calculation and its approval, Review of Stripping ratio of Opencast (OC) coal mines, etc. of MCL(CIL blocks) and Non-CIL blocks through the Application of ...

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stripping ratio :- It is generally expressed in the proportions of Overburden to coal or mineral removed. As the depth of Overburden increases more amount of money is spent for removal of the Overburden for exposing the mineral body / coal and the time will come when mineral / coal cannot be economically extracted out.

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Each coal seam is a composite seam comprising more than one coal seam section with shaly and sandy interbands. The reserve of the mine is 389 Million Tonne The Average stripping ratio is 1: 4.2 The Peak rated capacity of the mine is 15 Million Tonne/ year

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SACMA Surface Strip Coal Mining Handbook_rev1.pdf - sacea Introduction. This handbook on surface strip coal mining serves as a general introduction to the subject of .... 1.3 PRODUCTION COST AND STRIPPING RATIO.

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Additionally, the stripping ratio can be a dynamic parameter in a mine, changing over the years, depending on the cut-off-grade strategy and the overall mine planning of the project.

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What is STRIPPING RATIO? What does STRIPPING RATIO mean? STRIPPING RATIO meaning- STRIPPING RATIO definition - STRIPP...

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With increasing overburden to coal ratio, the cost of removal of overburden (known as stripping cost) adds considerably to the cost of mining the coal beyond economic limit. To develop a mine, the break even stripping ratio (at the surface of the final pit) must be established. It is found from the formula:

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Stripping ratio Wikipedia. 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 .

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3.2.6: Maximum Allowable Stripping Ratio (SRmax) Earlier in this lesson, we looked at the maximum stripping ratio, and we did it for coal seam. You will recall that the maximum allowable stripping ratio, SR max, also called break-even stripping ratio, is the maximum amount of overburden/waste that can be extracted per unit of ore at the ...

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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 ...

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SURFACE MINING METHODS. 2-3. 2.2 Strip Mining. Strip mining is ideally applied where the surface of the ground and the ... Typical examples of this type of mining are the larger tonnage coal mining ..... 5.2 Discuss the concept of stripping ratio and how haul road gradient...

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stripping ratio in coal mining CachedIn mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be ... Read more break even ratio for australia coal mining - crusher in India

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The economic stripping ratio used to define an economic mining block in an open pit coal mining situation is rationalised by considering the time value of money, and defining run of mine recovery and mining cost as dynamic variables dictated by the thicknesses, depths and number of seams within a mining block. The ratio is based on per ton of ...

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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.

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The declining trend in strip ratios for Indonesia's coal mines have allowed producers to survive in periods of lower coal prices through reduction in production costs and margins. However, producers are likely to have sterilised coal and jeopardised future coal reserves with continuous mining in lower strip areas.

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a. 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.

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Method of Mining Opencast Balance Coal Reserve 4.922 MT (balance extractable) Mine Plan Extraction Rate 0.3 MTPA Average Stripping Ratio 6.5-7 Mining Agency BLA Industries Pvt Ltd 3. Status of Clearances/Approvals Mining Plan(Reference to Grant) No. 13016/1/1996-CA-I (Vol.IV) Forest Clearance(Reference to Grant) No. 8-54/ 95 F-C

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effect of stripping ratio in coal mining Solution for. Aug 31, 2012 Switch to underground mining if your stripping ratio is more than BESR. Environmental impact of the coal industry Wikipedia, the free This process is known as acid rock drainage or acid mine drainage.

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Standard stripping ratio - the ratio of "overbudern (OB) to be removed" to "the mineral to be produced" during the whole project life. Suppose in an opencast mine, 20 lakh CuM OB will be removed during the life time (suppose 15 years) against the production of 10 lakh Te of coal, the standard stripping ratio …

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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…

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