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Ministry of Coal, GOI

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 …

effect of stripping ratio in coal mining

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.

3.2.4: Step 2 -- How Much of the Resource is a Reserve ...

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 …

Opencast Working And Stripping Ratio » MiningPathsala

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.

What is stripping ratio in mining? - Quora

Answer: 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

What Is a Stripping Ratio? (with picture)

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.

Availability of Coal Resources for Mining in Illinois

22 Stripping ratio, Danville and Herrin Coals combined, Kewanee North Quadrangle 30 23 Availability of coal resources, Kewanee North Quadrangle 31 24 Resources of Danville Coal available for surface mining, Kewanee North Quadrangle 32 25 Resources of Herrin Coal available for surface mining, Kewanee North Quadrangle 33

Surface mining planning and design of open pit mining

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.

Can Indonesia's coal mines maximise strip ratios and boost ...

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.

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.

Surface mining - Wikipedia

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.

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…

Whats the average stripping ratio of open pit mines around ...

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.

what is stripping ratio coal mining ppt

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 .

Economic Surface Mining of Multiple Seams

case of strip mining. With regard to the western coals, the outlook for the 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

Pritam Biswas - Dy. Manager (Mine Planning & Design ...

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 ...

Stripping Ratios: What are They and Why are They Important ...

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 ...

5 [25] Strip mining is used to extract a coal deposit ...

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.

WBPDCL

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

coal ton to bcm « BINQ Mining

Stripping Ratio(s) – Surface Mining | COAL MINING AND GEOLOGY 24 Nov 2012 … Coal miners measure waste in BCM, or bcy, and coal in tonnes or tons.Thus in coal SR is the number of BCM of waste that needs to be … »More detailed

In coal mining what is a good strip ratio? - Answers

Strip Mining can easily destory their natural habitat and even form cave in under the soil ---- Strip mining removes the habitat from many types of animals. During it's operation, a strip mine is ...

TUTORIAL EXAMPLES - stripping ratios and cut-off grades ...

SOLUTION Break-even cut-off grade = Mining cost/t ore + concentrating cost per tonne ore (Metal price per tonne – SRM costs per tonne metal) x recovery Mining cost per tonne ore = Mining cost per tonne material x (1 + stripping ratio) Mining cost per tonne ore ($1.47(1+1.5) = $3.68 Concentrating cost per tonne ore = $5.17 Metal price per ...

GOTITORIA EAST & WEST MINE

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

Glossary of Mining Terms - Coal Education

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.

12_Stripping Ratios & Pit Limits - Introduction to Mining ...

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.

Mine Plan - an overview | ScienceDirect Topics

Strip ratios for minable coal reserves range from 1:1 to over 35:1. A decrease in the strip ratio will decrease the cost of producing the coal. Underground mining methods are employed when the amount of overburden that would have to be removed by surface mining methods is cost prohibitive (i.e., the strip ratio is beyond an economic limit).

3.2.6: Maximum Allowable Stripping Ratio (SRmax) | ABC 123 ...

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 ...

what is stripping ratio coal mining

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...

Coal Surface Mining - Materials101

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 ...

What is STRIPPING RATIO? What does STRIPPING RATIO mean ...

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

Rational economic stripping ratios: International Journal ...

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 ...

Coal Ratio - an overview | ScienceDirect Topics

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:

mining engineering: STRIPPING RATIO (S)

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.

Vol. 5, Issue 12, December 2016 Experimental ...

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

(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 fStripping Ratio as a ...

(PDF) Surface Mine Design - ResearchGate

Auger mining is a surface mining techniq ue used to recover additional coal from a seam located behind a highwall produced either by stripping or open-pit mining.