grade tonnage curve in mining

grade tonnage curve in mining

Grade Tonnage Curve: How Far Can It Be Relied Upon?

2001-8-9 · The grade tonnage curve is widely used in the mining industry. From geology and mining planning to management and investment areas they are used for economic and financial analysis being probably one of the most important tools for representing variations in the characteristics of a deposit in function of cutoff grades.

Grade-Tonnage Curves, Ore-Waste Selection and Planning ...

1977-1-1 · A f t e r Williamson and Mueller ( 1 9 7 6 ) . and t h e m e a n grade o f that ore tonnage. For e x a m p l e t h e curves o f Fig. 2 2 3 for a cut-off of 0 . 3 0 will be reconstructed from Formery's chart. The only requirement is that the logarithmic variance of the small b l o c k s w e can select at mining be k n o w n t o be equal t o 0 . 1 .

[PDF] Grade Tonnage Curve: How Far Can It Be Relied

In the mining industry, from the geology and mine planning areas to management, the grade tonnage curve has been applied in economic and financial analysis probably being one of the most important tools used in determining the volume and grade of material in face of variations of the cut-off grade.

Cut-off grade estimation - QueensMineDesignWiki

2019-6-28 · The Grade Tonnage Curves display the tonnage above the cut-off grade and average grade of a deposit relative to cut-off grade. As the criteria for ore classification becomes more selective, the tonnage above the cut-off grade of the deposit decreases. Conversely, as the cut-off grade is lowered, the tonnage of the deposit increases.

Generate Statistics & Grade-Tonnage Curve - Progeox

2020-9-22 · Place the Statistics report in the drawing. This report includes the statistics items chosen in the module. Select the “Grade-Tonnage curve” (EDAGTC) command and select the block model (note that this command only works with block models). Hit Enter and configure the parameters in the window: Select the grade type. Input a density.

Understanding Cut-Off Grade 4 (Tonnage, Grade, and

2018-2-17 · The tonnage curve (grey line) is adjusted by factoring for lack of continuity, dilution (internal and external), and mine recovery. The grade curve (yellow) is adjusted for losses to royalties,...

(PDF) Significance of the" cut off-average grade-tonnage ...

Grade-tonnage curves representing standardized variations of SH (Sediment Hosted type) copper mineral deposits. Figura 6. Curvas ley-tonelaje que representan

Risk quantification in grade-tonnage curves and resource ...

The risk quantification in grade-tonnage curves is critical for capital investment in mining projects. Geostatistical simulations for orebodies can be used to obtain grade-tonnage curves, and ...

Tonnage-cutoff model and average grade-cutoff model

2010-10-1 · The tonnage, average grade, and cutoff are the basic parameters in mineral resource assessments and mining operations. Research on the inherent relationships between the tonnage, average grade above cutoff and the cutoff has been carried out for decades on the scale of an ore camp, district or ore province.

Calculation of Ore Tonnage & Grade from Drill hole Samples

2016-1-21 · d = 4a + b + c/6. Then, as one proceeds from hole to hole, b and c should be substituted, thus: 4b + a + c/6 and 4c + a + b/6, which will give the average depth of the ore in each hole. These formulas are derived as follows: which, in reality, divides the prism into three prisms.

Grade-Tonnage Curves, Ore-Waste Selection and Planning ...

1977-1-1 · A f t e r Williamson and Mueller ( 1 9 7 6 ) . and t h e m e a n grade o f that ore tonnage. For e x a m p l e t h e curves o f Fig. 2 2 3 for a cut-off of 0 . 3 0 will be reconstructed from Formery's chart. The only requirement is that the logarithmic variance of the small b l o c k s w e can select at mining be k n o w n t o be equal t o 0 . 1 .

Figure 2 from Grade Tonnage Curve: How Far Can It Be ...

In the mining industry, from the geology and mine planning areas to management, the grade tonnage curve has been applied in economic and financial analysis probably being one of the most important tools used in determining the volume and grade of material in face of variations of the cut-off grade.

Grade Tonnage Curve: How Far Can It Be Relied Upon?

2021-7-1 · Grade Tonnage Curve: How Far Can It Be Relied Upon? 2 1. Introduction The grade tonnage curve is widely used in the mining industry. From geology and

Risk quantification in grade-tonnage curves and resource ...

2011-7-19 · The risk quantification in grade-tonnage curves is critical for capital investment in mining projects. Geostatistical simulations for orebodies can be used to obtain grade-tonnage curves, and determine uncertainty and risk assessments. Applying these in multi-element deposits can be a difficult practice, as the related attributes using the traditional co-simulation approaches require intensive ...

GRADE-TONNAGE CURVES (Chapter 12) - Applied Mineral ...

David, M., 1972, Grade–tonnage curves: use and misuse in ore-reserve estimation; Trans. Inst. Min. Metall., Sect. A, pp. A129–A132

Generate Statistics & Grade-Tonnage Curve - Progeox

2020-9-22 · Place the Statistics report in the drawing. This report includes the statistics items chosen in the module. Select the “Grade-Tonnage curve” (EDAGTC) command and select the block model (note that this command only works with block models). Hit Enter and configure the parameters in the window: Select the grade type. Input a density.

Grade Tonnage Curves and Change of Support – Snowden

2019-12-16 · The grade tonnage curve under the model validation compares the block model grade tonnage curve with the expected theoretical grade tonnage curve for that support – in other words the block size that has been read directly from the loaded block model. A range of cut offs can be defined by entering a starting and ending value and the step change.

Grade and Tonnage Uncertainty Analysis of an African ...

2017-12-21 · The grade–tonnage curve shows the importance of incorporating both volume and grade uncertainty in resource modeling. The sensitivity analysis results show that the studied mine is highly sensitive to the servosystem value, and careful selection of

Production rate optimisation avoiding the temptation of ...

4 Head grade and mining rate The grade-tonnage curve is an essential tool in mine planning, allowing the designer to choose a small, high-grade option or a large, low-grade option, or any option in between these limits. For each option there is a set of corresponding cutoff grades used in planning and operations. Different mining and processing

Forecasting the grade-tonnage curves and their

2020-12-15 · Forecasting grade-tonnage curves at the Mehdiabad deposit Boll. Geof. Teor. Appl., 58, 217-232 219 a point-support location x is denoted by Z k (x), the associated Gaussian transform is denoted by Y k (x), while the transformation function, denoted by φk, is such that: Z k (x) = φk (Yk (x)) (1)In practice, knowing experimentally the distribution of the variable of interest Z

Grade Tonnage Curve: How Far Can It Be Relied Upon?

2021-7-1 · Grade Tonnage Curve: How Far Can It Be Relied Upon? 2 1. Introduction The grade tonnage curve is widely used in the mining industry. From geology and

GRADE-TONNAGE CURVES (Chapter 12) - Applied Mineral ...

David, M., 1972, Grade–tonnage curves: use and misuse in ore-reserve estimation; Trans. Inst. Min. Metall., Sect. A, pp. A129–A132

Risk quantification in grade-tonnage curves and resource ...

2011-7-19 · The risk quantification in grade-tonnage curves is critical for capital investment in mining projects. Geostatistical simulations for orebodies can be used to obtain grade-tonnage curves, and determine uncertainty and risk assessments. Applying these in multi-element deposits can be a difficult practice, as the related attributes using the traditional co-simulation approaches require intensive ...

Assessment of Uncertainty in Grade-Tonnage Curves of a ...

2021-8-2 · Assessment of Uncertainty in Grade-Tonnage Curves of a ... O. Erten, M. S. Kizil, B. B. Beamish The University of Queensland, School of Mechanical and Mining

Forecasting the grade-tonnage curves and their

2020-12-15 · Forecasting grade-tonnage curves at the Mehdiabad deposit Boll. Geof. Teor. Appl., 58, 217-232 219 a point-support location x is denoted by Z k (x), the associated Gaussian transform is denoted by Y k (x), while the transformation function, denoted by φk, is such that: Z k (x) = φk (Yk (x)) (1)In practice, knowing experimentally the distribution of the variable of interest Z

Production rate optimisation avoiding the temptation of ...

4 Head grade and mining rate The grade-tonnage curve is an essential tool in mine planning, allowing the designer to choose a small, high-grade option or a large, low-grade option, or any option in between these limits. For each option there is a set of corresponding cutoff grades used in planning and operations. Different mining and processing

The Mine Call Factor - kriging

2005-6-28 · C. Grade/tonnage curves To compare the estimates produced from the face sampling with the 'actual' values in the stopes we have constructed 'grade/tonnage!' curves more commonly known on the gold mines as 'payability' graphs. In brief, we apply a

The Distributions and Relationships of Grade and

2010-7-22 · The tonnage and grade of a second type of sulfide deposit, which is associated with small orogenic intrusions, were also found to be lognor- mally distributed. The median nickel grade of these deposits is 0.60 percent, and their median tonnage is 1.27xl06 metric tons; these variables are statistically independent. ...

v119n3a1 A stochastic cut-off grade optimization model

2019-4-3 · Given a set of equally probable grade-tonnage curves (w), the stochastic approach develops a cut-off grade policy by determining the cut-off grade (G) from time periods 1 to N. The NPV of future cash flows is maximized subject to mining, processing, and refining capacity constraints. The objective function for the cut-off grade optimization remains

How to Maximize Grade and Recovery Curve- Case of

Grade Vs. Recovery curve. Generally, we plot the grade and recovery in the form of a curve to illustrate their dependence variation among the process. The maximum recovery is 100%, which refers to the raw material or the ore before beneficiation. But the ultimate grade