Stripping ratio and pit limit - Basic Mining TechniquesJul 26, 2017 . Stripping ratio determines where the pit limit will be. There are basically three (3) forms of stripping ratios. The overall stripping ratio (average stripping ratio), the maximum allowable stripping (break even stripping ratio), and the instantaneous stripping ratio (incremental stripping ratio). Fig1. Section of a.stripping ratio incremental,1 4 Stripping Ratio | Ratio | Surface Mining - ScribdThe various stripping ratios that are used in surface mining are the following: 1. 2. 3. 4. 5. 6. 7. Volumetric / geometric strippling ratio Break even stripping ration Limiting stripping ratio Instantaneous stripping ratio Cumulative/ average stripping ratio Overall Stripping ratio Incremental stripping ratio. Geometric / Volumetric.
stripping ratio incremental,Surface Strip Coal Mining Handbook - saceaFundamental stripping ratio concepts, the break even stripping ratio. (BESR) and multiple seam mining incremental stripping ratios. ▫ The components of the basic profit function. Apply, calculate or predict. ▫ Basic production cost, profitability and limiting stripping ratio and BESR. ▫ Stripping ratios and unit profits from selected.stripping ratio incremental,An approach towards ascertaining open-pit to . - Semantic Scholarbye-products, if any (Tatiya, 2005). To develop a pit design requires the establishment of the Break Even Stripping Ratio. (BESR). This ratio refers only to the last increment mined along the pit wall. In other words, BESR is applied only at the surface of the final pit and must not be confused with the OSR, which is always less;.John Frank
Jul 26, 2017 . Stripping ratio determines where the pit limit will be. There are basically three (3) forms of stripping ratios. The overall stripping ratio (average stripping ratio), the maximum allowable stripping (break even stripping ratio), and the instantaneous stripping ratio (incremental stripping ratio). Fig1. Section of a.
Jun 27, 2017 . 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 order to extract a given amount of ore. That said, stripping ratios are not only about the volume of unwanted.
CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given ... Calculate incremental NPV for each year (i) N Pj NPVi = ∑ j −i +1 j =i (1 + d ) 42 Steps Of The Algorithm (Cont.).
bye-products, if any (Tatiya, 2005). To develop a pit design requires the establishment of the Break Even Stripping Ratio. (BESR). This ratio refers only to the last increment mined along the pit wall. In other words, BESR is applied only at the surface of the final pit and must not be confused with the OSR, which is always less;.
capability of the stripping machine is the limiting factor. From the economic standpOint, the limiting factor is the familiar stripping ratio which is used in making a feasibility study. 'Stripping ratio' as used here in reference to coal mining is de£ned as the cubic yards of overburden which must be removed to produce one Ion of.
In the economic evaluation, variables as the breakeven cutoff grade (BCOG), stripping ratio and optimal cutoff grade ... the mineral value, assuming a finite incremental pit expansion. In other words, the open-pit ... the stripping ratio will be 1.039, which is the overall stripping ratio of the 15.73-year mine life operation.
Jan 1, 1980 . n. 2= summation of all "n" blocks in the mining increment. To apply this pit limit evaluation method using sensitivity analysis, a mine planner would develop a series of pit limits with each individual pit limit based on a different value of the break-even stripping ratio. With these pit limit configurations in hand,.
Dec 11, 2013 . At the same time, they've been able to strip out costs in their procurement spend with a reduction of 14% .. Overall strip ratios have dropped from almost 4:1 to 2:1 as a result of the Phase 3 pushback. During 2017, the .. These are already producing and will quickly bring on incremental tonnes. There are.
The incremental stripping ratio (the ratio of the tonnage of waste that must be moved to access the next mass increment of ore that will be accessed) on each cross- section was compared against the break-even stripping ratio for the estimated ore grade and appropriate revenue and cost inputs. The final pit shell was then.
on low stripping ratio areas at the same grade, then the following discussion is still effective.) Higher early grades means . Increment A is what we would have mined and processed in the first year if we used a marginal cut-off, and increment B is the material to be mined and processed in subsequent years. If we raise the.
Mar 1, 2016 . providing incremental annual production of some 278,000 t of copper and 6,000 t of molybdenum beginning in 2016. First concentrate from this massive expansion ... and a 1.06 strip ratio . Concentrator throughput planned at 80,000 t/d . Near-surface supergene blanket . Heap leach and SX/EW plant to.
May 14, 2012 . These changes substantially reduce the project's strip ratio from 2.7 to 1.5, eliminating approximately 2.3 billion tonnes of waste rock stripping and storage . the ultimate LG pit limits were set at the point where an incremental increase in pit size did not significantly increase the pit resource (an incremental.
Jun 21, 2016 . coal prices and individual pit economics, increased strip ratio, and work underway to set ourselves up for more consistent . substantial pit deepening, which combine to increase the strip ratio and increase truck cycle time. This will see . Under both spot prices and consensus forecasts, these incremental.
process, the mine operates at a higher strip ratio during the initial period and moves towards a lower strip ratio to the . It is often not possible to mine the incremental pit shells generated by pit optimization . This results in low-grade material being prioritized ahead of high-grade, while the stripping ratio and equipment fleet.
Mar 6, 2018 . Drawdown of incremental $60.0 million from Credit Facility with Macquarie Bank Limited in June 2017 . The 2017 increase in depreciation in property, plant and equipment and depreciation per ounce sold mainly reflects a higher capitalized stripping ratio from Siou at depth compared to the same period in.
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Production stripping costs are deferred when the actual stripping ratio incurred significantly exceeds the expected long term average stripping ratio and are subsequently amortised when the actual stripping ratio falls below the long term average stripping ratio. glencore. glencore. .
Mar 30, 2017 . the benefits of our steelmaking coal operating strategy and the potential benefits of the anticipated synergies, projected strip ratios, projected 2017 total costs, projected 2017 truck productivity, projected 2017 mining and maintenance costs, projected 2017 sustaining capital costs, the objectives for our.
Square-wave adsorptive cathodic stripping voltammetry was used to determine pioglitazone HCl in Britton Robinson buffer of pH5. The adsorptive cathodic peak was observed at -1.5 V vs. Ag/AgCl. The peak response was characterized with respect to pH, supporting electrolyte, frequency, scan increment, pulse-amplitude,.