Pre-stripping is included in calculation of stripping ratio. Rock, both ore and waste, close to surface, may be softer than in other parts of the pit, especially if it is oxidized. Soft rock may be amenable to mining by ripping and dozing with a bulldozer instead of drilling & blasting.
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Overall (s)- and immediate (variable) stripping ratio (S’), with reference to the open pit mining method. 3.1 Illustrate a surface mining classification method that differentiates between strip- and terrace mining methods.
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 SMEs Surface Mining were specifically referenced. Stripping Ratio as a Fundamental Ability to surface mine depends on the value
Apr 30, 2016 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.
May 01, 2016 The strip ratio (SR) is the simplest measure of mining efficiency. Strip ratio is the fraction of overburden (or waste ore) versus the weight of bitumen-rich oil sands. 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. TV:BIP is defined as the total ...
Oct 08, 2019 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.
Feb 25, 2020 Alluvial Mining Avoca Cash flow Cut-off-grade Downloads Dredging Gold Incremental cut off grade (ICOG) Instantaneous stripping ratio JORC Codes Logic Mill cut off grade (MCOG) Mine Ventilation Mineral Resources Authority Mining Mining Economics Mining Engineering Mining in PNG Mining method Net Present Value Open Pit Mining Ore Grade Ore ...
May 08, 2020 The quick ratio is important for evaluating mining companies because of the substantial capital expenditures and financing necessary for mining operations. Analysts and creditors prefer to see ...
From commencement of mining in 1997 to 2003, the Company attributed stripping costs in its Minifie pit based on the stripping ratio determined on a phase basis. The mining and geological conditions were also such that phase ratios were reasonably consistent and predictable, although at times, material variability in the ratios did occur.
The fraction of waste rock to ore excavated is defined as the stripping ratio. Stripping ratios of 2:1 up to 4:1 are not uncommon in large mining operations. Ratios above 6:1 tend to be less economically viable, depending on the commodity. Once removed, overburden can be used for road and tailings construction or may have non-mining commercial ...
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. Break-even stripping ratio: The instantaneous stripping ratio at the point where the cost of stripping the waste exactly equals the value of the ore uncovered. Stripping Ratio Example It will be assumed that: the pit ...
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 …
Oct 31, 2018 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 …
6. Stripping ratio . The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio.. Stripping is the removal of waste rock from above and around the orebody. 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.
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 income generated by the ore is insufficient to offset the costs incurred in mining.
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…
Feb 21, 2021 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.
Stripping Ratios, Pit Limits & Cutoff Grade Optimization. Download. Stripping Ratios, Pit Limits & Cutoff Grade Optimization. F. Barcelonistas. Related Papers. Optimum cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation.
Stripping Ratio determines relative amounts of each to be moved. These notes contain information considered common knowledge to those familiar with Strip Mining. Strip Mining depends on the value of the ore being high enough to offset the cost of Overburden Removal. Stripping Ratio determines relative amounts of each to be moved.
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