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employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation. Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits.


What is STRIP MINING? What does STRIP MINING mean? STRIP MINING meaning - STRIP MINING definition - STRIP MINING expl...


volatility compared to the strip-ratio method, which aims to achieve a higher level of consistency in allocating stripping costs to reserves over the life of the mine. Under the proposals, any existing stripping cost balances need to be reclassified as a component of the mine asset to which the stripping …


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Mining Terms - kau

Stripping: is the removal of overburden. Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed. Toe: is the base of a bank bench or a slope.


Pit Planning & Design Long-range mine planning Maximum allowable stripping ratio (break-even ratio) establishes pit limits Ratio of overburden to ore at the ultimate boundary of the pit where the profit margin is zero Value of ore in ($/ton) is the recoverable value, production cost is the overall cost through refining or final processing.


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 could generate more than one billion metric tons


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.


The mine plan entails a very low strip ratio (0.76:1), which means every there is very little waste ore to help keep costs low and gold production high. At …


Company cut costs by 12% despite rise in stripping ratio (6.1 from 5.8). RMG - KTK reports 1Q financials, May 23, 2013. The average stripping ratio of the current open-pit mines is 1.5-2.0 [m.sup.3]/t but is expected to go above 4 [m.sup.3]/t in the near future. Emerging technology changes for CIL.


The stripping ratio is chosen based on economics. A high grade orebody can support a high stripping ratio. A low grade ore body cannot support a high stripping ratio.


Strip mining is a mineral-extraction process in which a layer or seam of undesired material (called "overburden") is removed from the surface of an area to allow efficient access to a desired material existing underneath the layer being stripped. As the process suggests, it is a form of surface mining, and it is primarily used to extract ...


Stripping ratio- The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material. Stockpile-Broken ore accumulated in a heap on surface, pending treatment or shipment. Sump-The bottom of a shaft, or any other place in a mine, that is used as a collecting point for drainage water.


Kinsevere is a world-class copper mine located in DRC. Kinsevere was acquired by MMG in 2012 and is an important part of the company's portfolio of high-quality base metals assets.


recovered from the salne mine, but each in a separate pit. Mulliple-scam mining is a very important phase of the stripping industry in the United States today. As in the casc of conventional stripping, multiple-seam slrip-miuing is classified either as area or contour mining .. Area strip-mining


Price to Net Asset Value (P/NAV) P/NAV is the most important mining valuation metric, period. "Net asset value" is the net present value (NPV) or discounted cash flow (DCF) value of all the future cash flow. Cash Flow Cash Flow (CF) is the increase or decrease in the amount of money a …


The ratio of overburden excavated to the amount of mineral removed is called the stripping ratio. For example a stripping ratio of 4:1 means that 4 tonnes of waste rock are removed to extract one tonne of ore. Lower the ratio, the more productive the mine. Stripping ratio varies with the area under mining. According to the data generated by


The economic stripping ratio varies widely from mine to mine, depending upon a number of factors. In the case of direct shipping ores, it may be as high as 6:1 or 7:1. In the case of low grade ore, a stripping ratio of less than 1.5:1 is often considered as an economic limit. For mining of the iron ore, it is essential to uncover the mine area ...


IFRIC DI/2010/1 Stripping Costs in the Pro­duc­tion Phase of a Surface Mine published. Comment deadline 30 November 2010. 10 August 2011. Near Final Draft of IFRIC 20 published. 19 October 2011. IFRIC 20 Stripping Costs in the Pro­duc­tion Phase of a Surface Mine issued. Effective for annual periods beginning on or after 1 January 2013.


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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Chapter 4: Mining waste

The ratio of waste rock/ore is called stripping ratio. For example, a stripping ratio of 2:1 means that 2 tonnes of waste rock needs to be removed to mine 1 tonne of ore. Generally, an open pit mine has a higher stripping ratio than an underground mine. Waste rock is often deposited in piles or heaps close to the mine to minimize transports.


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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Stripping costs are those costs incurred when removing overburden or waste materials in order to obtain access to a commercially-producible ore body. If so, and the activity provides better access to the deposit, then under GAAP the cost should be capitalized along with other development costs. If not, then the stripping cost should be charged ...


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…


The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.


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.


Answer: I am busy with a design project and I need to benchmark average stripping ratios of different Diamond mines to justify going underground. Open-pit mines are typically enlarged until either the mineral resource is exhausted, or an increasing ratio of overburden to ore makes further mining...


The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * 11.11/ Coal thickness in inches – Assumes coal is 80 lbs/ft^3 (good for bituminous) – Area Strip Mine Geometry – Geologic Stripping Ratio – no accounting for rehandle or less than coal recovery Your Turn • Use What You Have Learned About Calculating ...


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 ...


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.


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.


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.


Stripping ratio - Wikipedia, the free encyclopedia In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to …