stripping ratio in coal mining

Break Even Stripping Ratio Example For Coal Mining

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

COAL MINING MIDTERMS Flashcards | Quizlet

The mining proceeds around the hills and mountains, extracting the coal seam to a depth fixed by the economic strip ratio. CONTOUR MINING METHOD - Removing overburden from the coalbed with the first cut at or near the outcrop, and proceeding around the hillside.

Basic Mining Techniques

coal ton to bcm « BINQ Mining

Jun 07, 2013· 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

strip ratio in coal mining Mine Equipments

What Is a Stripping Ratio with picture. Dec 04 2019 · Stripping ratio is a term that is derived from the mining industry and is used in reference to the openpit mining process The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process

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. 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.

CHAPTER 11 Mining Technology

basin which produces Federal coal. Area strip mining proceeds by first making a box cut into the earth to uncover the initial strip of coal that is to be mined. The strip of coal uncovered will vary from 100 to 200 ft in width and from one-quarter to several miles in length. The actual size of the cut will be de-termined by the thickness of ...

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

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.

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

Stripping Ratios, Pit Limits & Cutoff Grade Optimization. Download. Related Papers. Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. By Raul Cezar.

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

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…

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 ...

Costs of coal surface mining and reclamation in Appalachia ...

Coal surface mining and reclamation costs in Appalachia are estimated as a function of reclamation quality, the angle of natural terrain, and the overburden-to-coal stripping ratio. When mining to a maximum stripping ratio of 20, the cost of providing minimally acceptable, or basic, reclamation is estimated to be $0.49, $0.95, and $1.50/ton of ...

Mining | Coal Mines

If the break-even stripping ratio remains favorable, 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. Area strip mining

(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.

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...

2012 Americas School of Mines

Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It's all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran's 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore 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.

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, …

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

As mine planning advances beyond the prefeasibility stage, stripping ratios at different cross sections will be calculated as well. The overall stripping ratio is calculated using the average values for the volume of the overburden and the average value for the weight of the coal (ore). This number is a key indicator for the potential of the ...

Surface mining planning and design of open pit mining

Jan 09, 2016· 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.

mining engineering: STRIPPING RATIO (S)

Jun 06, 2010· 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.

(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 ...

Coal Ratio - an overview | ScienceDirect Topics

Contour surface mining takes advantage of the low strip ratio coal reserves adjacent to the outcrop. Contour mining equipment includes a drill, loader, bulldozers, and trucks. The steps in contour mining begin with drilling and blasting a triangle shaped portion …

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 ...

Break-even stripping ratio | Britannica

mining. The break-even stripping ratio is a function of ore value and the costs involved. 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 …

Determining Stripping Ratio - Basic Mining Techniques

Apr 04, 2016· 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 …

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...

Surface Coal Mining Methods in Australia

Surface Coal Mining Methods in Australia 5 2. 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

Stripping Ratio Question : mining

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. level 1. 2 points · 13 days ago.

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

Dec 16, 2016· 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.

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.

What Is Stripping Ratio Coal Mining Crusher-HN Mining ...

Coal Crusher Overburden - Dres. Schipler. What Is Stripping Ratio Coal Mining Crusher Mczb Heavy. Coal Strip Mine Crusher Plant Benbbennekomnl Aug 31 2012 Chapter 2 The Environmental Effects of Strip Mining The Strip EFFECTS OF STRIP MINING A ll mining operations have a disruptive effect on the so long as the ratio between the overburden and the coal seam called the stripping ratio In coal ...

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.

stripping ratio gold mining

31 jan 2019 strip ratio declines to a weighted average of approximately 6:1 for the quarterly gold sales of 31,447 ounces at an average price of a$1,720/oz the open pit mining fleet focussed on waste stripping of the harrys hill pit. get price. << Previous: Phosphate Mining In Namibia.

stripping ratio in coal mining

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