stripping ratio in coal mining

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.

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

To surface mine we need to remove some waste in addition to ore / coalc. SR measures how much waste needs to be removed so that a unit of ore/coal can …

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.

A new method to confirm the economic and reasonable ...

A new method to confirm the economic and reasonable stripping ratio of surface coal mine Abstract: Economic rationality is currently open pit stripping ratio is well calculated by comparing the cost of industrial exploitation, the calculation does not take into account the safety of mining work well accidents, such as surface subsidence caused ...

coal mining - Choosing a mining method | Britannica

Auger mining. Auger mining is usually associated with contour strip mining. With this method, the coal is removed by drilling auger holes from the last contour cut and extracting it in the same manner that shavings are produced by a carpenter's bit. Coal recovery rates approach 60 percent with this method. The cutting heads of some augers are ...

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

Stripping Ratios, Pit Limits & Cutoff Grade Optimization. F. Barcelonistas. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. ... Optimal production scale of open pit mining operations with uncertain metal supply and long-term stockpiles. By Mohammad Asad.

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.

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 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.

Strip Mining - an overview | ScienceDirect Topics

Andrew P. Schissler, in Encyclopedia of Energy, 2004 2.3 Strip Mining. Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips. The pits are parallel and adjacent to each other. Strip mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling.

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.

Diesel prices fuel strike plan in coal PSUs | Nagpur News ...

This is the basic process in mining coal. Due to the geological conditions in Vidarbha, the stripping ratio is rather high. As much as 10 cubic metres of earth has to be removed to get a single ...

Open Pit Mining | IntechOpen

Also, the ratio of the total volume of waste to the total volume of ore is defined as the overall stripping ratio. A lower stripping ratio means that less waste has to be removed to expose the ore for mining which generally results in a lower operating cost . The major types of stripping ratios are overall, instantaneous, and break-even.

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 ...

2-SURFACE MINING.pdf - Introduction to Mining MEC 13103 ...

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 volume of ore. For example, a stripping ratio of 3 means that mining one Tonne/cubic meter of ore will require excavation of three cubic meters of waste rock.

Forecasting on Indonesian Coal Production and Future ...

In terms of the operating cost per stripping ratio, the three coal mining companies have varying costs. Adaro's cost per stripping ratio is the largest among the three, of USD 6.15 per ton, followed by Arutmin 3.39 USD per ton, and t KPC 3.17 USD per ton. The difference in the operating cost of these companies is due to different supply chain ...

(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.

RESERVE CALCULATION OF COAL MINED BASED ON …

Mining is an activity carried out to take deposits of minerals below the earth's surface, one of which is coal. Keywords: Coal, Block model, Solid Batter block, Stripping Ratio, Reshgraph Suggested Citation: Suggested Citation

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 ...

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.

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 ...

Bara Alam Utama Mining Operations - baracoal.com

Bara Alam Utama operates surface mining operations with low stripping ratio and large scale equipments to optimize economic scale of long distance hauling transportation. Majority of the mining activities consist of removal of overburden and extraction of coal. Extracted coal is then processed through the crushing plant to ensure the coal ...

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).

How is stripping ratio calculated? – AnswersToAll

What is stripping ratio in coal mining? 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.

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 ...