Surface mining – involves stripping off overburden to access coal resources. Overburden is the layers of soil and rock that overlie a coal bed. Surface mining is limited by stripping ratios: ratio of the volume of overburden (in cubic yards) to the quantity of coal (in short tons). the limit of surface mining (maximum economic stripping ratio) is
Understanding and calculating the appropriate stripping ratio for a mining project is indispensable for planning and the long-term sustainability of mining operations. Stripping Ratio Calculation. In surface mining, the stripping ratio is calculated to determine the amount of overburden that must be moved to extract a unit of ore. Accurate ...
The presentation clarified the technical and geological aspects of mining as well as significance of the stripping costs, especially in open pit mining. The main aspect of the presentation was treatment of waste and overburden. ... capitalise using a strip ratio ; Most IFRIC members thought that Alternative 3 was the conceptually right answer ...
The Instantaneous Stripping Ratio (ISR) is the stripping ratio for a given push back, where a tiny slice of material, i.e., ore and/or waste, is removed from a pit wall. This …
In coal mining: Contour strip mining. 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 be recovered by underground mining or by augering.
Li et al.4 derived a formula to calculate the eect of mining area width on the stripping ratio and constructed an optimisation model of mining area width and end gang coal compression height ...
ORE MODELLING & RESERVE CALCULATION WRITE UP REPORT. Jackson Wapu. Download Free PDF View PDF. ... As open cut coal mines move into deeper areas andl the stripping ratios increase, the relative cost of overburden removal also increases. ... results are used as input to a production schedule design and are compared to the schedule generated ...
Download scientific diagram | Calculation of Stripping ratio Stripping ratio Calculation from publication: Mining Evaluation of Sulfur Deposits in Al-Mishraq Area Using Geostatistical Method | The ...
In mining, overburden (also ... Standard stripping ratio - the ratio of "overbudern (OB) to be removed" to "the mineral to be produced" during the whole project life. Suppose in an opencast mine, 20 lakh CuM OB will be removed during the life time (suppose 15 years) against the production of 10 lakh Te of coal, the standard stripping ...
The mining operation's cut-off grade is 0.20%, and the stripping ratio is 1.9. Fig. 11 shows the calculation for the optimal ultimate pit in the area called "Cerro Colorado", with an area of 2.5 × 1.1 km 2 and a maximum depth of 300 m.
Download stripping ratio and break even stripping ratio and more Lecture notes Mining Engineering in PDF only on Docsity! STRIPING RATIO AND BESR IN OPEN PIT MINING Cont. 2.2.2 Open pit mining Mainly refers to the situation in which the surface mines are rarely above a few hundred meters radius in area extend (width and length) but proceed downwards leaving a …
In surface mining, the stripping ratio is calculated to determine the amount of overburden that must be moved to extract a unit of ore. Accurate calculation of this ratio is critical for efficient …
This ratio is not static; it evolves with the life of the mine. In the initial phases of a mine's development, the strip ratio may be relatively low as the surface ore is accessed. However, as mining progresses deeper, the overburden increases, thus inflating the strip ratio and challenging the economic calculus of continued operation.
In mining phase the cutoff grade calculation would include the drilling, ... The strip ratio is the r atio of the number of tons of waste that must moved for one ton of ore to be .
By analyzing and comparing the stripping ratio, mining life of the district, fault influence, difficulty of transition connection in the mining districts, the convenience of transportation system ...
The mining operation's cut-off grade is 0.20%, and the stripping ratio is 1.9. Fig. 11 shows the calculation for the optimal ultimate pit in the area called "Cerro Colorado", with …
The profit function can also be formulated in unit values (per ton or cubic meter of ore), by assigning a unit profit function L ′ ($/h), which is given by (2) L ′ = T U V − M − E R − B − F P. In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore T.It is therefore essential to determine what their ...
Based on the economic stripping ratio to locate a reasonable boundary position, this paper conducts linear fitting analysis on the data in the table, the line graph is shown in Fig. 10, and the ...
The most basic calculation of the strip ratio involves dividing the tonnage of waste material by the tonnage of ore material. ... higher strip ratios translate to high mining costs and this is ...
" # $%&' 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: SR …
Question: 2. Calculate the maximum allowable stripping ratio, locate the pit limit (specity = vertical depth to the deposit and d = horizontal distance along the surface from the outcrop), and calculate the overall stripping ratio (actual yd/ton or mionne) in mining the ore body shown in the figure below by surface methods.
The main topics that will be discussed in this chapter will include an introduction into the general features of open pit mining, ore body characteristics and configurations, stripping ratios and ...
As a result, mining companies calculate strip ratios for open-pit projects well before they enter development and production, and seek out projects with relatively low strip ratios. Even so, given all the factors involved in calculating a strip ratio, it's difficult to determine an overall ideal figure. "In the case of a 'typical' large ...
Note: (1) Stripping ratio is defined as the ratio of OBR to Coal produced in Open Cast mining. (2) Meghalaya OBR figures are not known and not reported. (3 ) While calculating stripping ratio, if OBR is not reported, corresponding production was excluded to …
the stripping activity. The DI proposes this "specific association" approach in preference to the "strip ratio" approach which is currently used by many in the industry. Recognising the stripping cost asset The DI proposes that the stripping asset should be recognised as the stripping activity takes place and
The strip ratio is the amount of waste rock, or overburden, that must be removed in order to get to the mineralized rock (ore). The strip ratio is calculated by dividing the thickness of the ...
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.
For the mining and processing of mineral commodities, the quantity of rock required to be mined varies significantly by commodity and deposit, and depends on factors including ore grades, deposit type, mining method (e.g., open pit or underground), ore body depth, and stripping ratios even for a single mineral commodity.
At their most basic, strip ratios can be calculated by dividing overburden thickness by ore thickness. For example, an overburden thickness of 100 meters and an ore thickness of 50 meters would...
As a result, mining companies calculate strip ratios for open-pit projects well before they enter development and production, and seek out projects with relatively low strip ratios. That said, given all the factors involved in calculating a strip ratio, it's difficult to determine an overall ideal figure. Some sources say a strip ratio of 3:1 ...
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Coal: Stripping Ratio: Private Sector: Castron Mining Limited data was reported at 8.830 % in 2006. This records a decrease from the previous number of 31.000 % for 2005. Coal: Stripping Ratio: Private Sector: Castron Mining Limited data is updated yearly, averaging 19.915 % from Mar 2005 (Median) to 2006, with 2 observations.
Calculate the maximum stripping ratio if the total cost of production (excluding overburden removal) is $5.90 per ton of ore and overburden removal costs are $0.3 per ton of waste. Assume copper values of …
In general, during the initial stage of the mining, the stripping ratio is high. As mining progresses the SR decreases, reaching a minimum before increasing again with greater mining depth. At this point, the stripping ratio is a controlling factor in comparing the cost of mining by open pit versus underground methods. Slope Angle
To address the problem of excessive local secondary stripping between adjacent mining areas in open pit mines caused by internal row raising, a multivariate function was fitted to the model of the main mining seam of Zhundong open pit coal mine in Xinjiang, and the different locations of the end gang of the second mining area were divided into multiple sections at …
