grade tonnage curve in mining

grade tonnage curve in mining

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

Feb 17, 2018  The tonnage/grade curve provides two key characteristics for the deposit under investigation. Firstly, the blue line represents the cumulative tonnage (y1-axis) of

Grade Tonnage Curves and Change of Support – Snowden

Dec 16, 2019  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-Tonnage Curves, Ore-Waste Selection and Planning ...

Jan 01, 1977  In other words, the grade--tonnage curve based on kriged value is unbiased. One can thus tally block values, c o m p u t e their m e a n grade, d o whatever r e c o m b i n a t i o n o n e w a n t s t o c o m p u t e an e x p e c t e d profit; t h e true value, k n o w n after mining, will be m o s t closely approached b y kriging.

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

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. The grade tonnage curve is usually calculated with the in-situ resources or reserves and shows

Tonnage-cutoff model and average grade-cutoff model for a ...

Oct 01, 2010  Introduction. 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.

Grade Tonnage Curves and Change of Support - YouTube

Oct 28, 2019  Predicted grade tonnage curve allows you to quickly generate grade tonnage curves at any given block size without the need to import a block model. To get ac...

Cut-off grade determination for the maximum value of a ...

mine with an average grade of 6 g/t Au and a logrithmic variance of 1.2 are applied to the model to illustrate the benefits of representing cut-off grades in terms of present value curves for different segments of a mining operation. Keywords: cut-off grade, Net Present Value, grade-tonnage curve, balancing cut-off grade, mining, processing, marketing.

Mining Valuation Lesson: Cut-Off Grade Theory and Practice ...

Dec 04, 2011  Now, if we go back to the original tonnage grade distribution as shown in our graph, we can see that roughly 6 per cent of our orebody has a grade of less than 1.5 grams per tonne. Obviously when we mine the orebody, we would try and stay away from mining and certainly would not treat the 6 percent of tonnage below the cut-off grade.

Calculation of Ore Tonnage Grade from Drill hole Samples

Mar 19, 2017  (5) Multiply total tonnage of ore in minor prism by copper per cent, in hole, which gives total tonnage of copper in each minor prism. After treating each hole in the prism in this manner, add the tonnages of ore and the tonnages of copper in each of these minor prisms, which will give the mass tonnage of ore and the mass tonnage of copper in the larger prism.

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

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. The grade tonnage curve is usually calculated with the in-situ resources or reserves and shows ...

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

Curves representing standardized variations of grade-tonnage in "orogenic gold" mineral deposits. The gold curves in green contained in the tonnage valued have also been included. Figura 7.

Tonnage-cutoff model and average grade-cutoff model for a ...

Oct 01, 2010  1. Introduction. 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.

Grade Tonnage Curves and Change of Support - YouTube

Oct 28, 2019  Predicted grade tonnage curve allows you to quickly generate grade tonnage curves at any given block size without the need to import a block model. To get ac...

Generate Statistics Grade-Tonnage Curve Progeox

Sep 22, 2020  In this tip of the month, we will see how to insert a statistics report and generate a grade- tonnage curve for a block model. This is really useful to quickly analyze the properties of each grade value and to determine the optimal point of obtaining the maximum grade without decreasing the tonnage.

The Mine Call Factor - kriging

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 cutoff value or pay limit to the values and calculate the

Calculation of Ore Tonnage Grade from Drill hole Samples

Mar 19, 2017  The increase in the tonnage of copper by the Harding angular method proved to be more than 54,000 metric tons, and the percentage of copper per ton was also increased by 0.024 per cent. I worked out all the prisms, about 300, by the Harding angular method and by the standard method, and checked the results in each case by the geometrical method.

Mineral resource estimation - Wikipedia

Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model. There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.

Mining parameters such as tonnage, average grade, Chegg

Mining parameters such as tonnage, average grade, metallurgical recovery, dilution and desired profit are important parameters in the preparation of economic analyses. Given the following information about a stope in Ajith mining block : (7 points) Stope dimensions: 12 m wide, 32 m long, 6 m high. Ore tonnage factor: 0.43 m 3 /tonne

Enabling the Mining Community • Snowden

The predicted grade tonnage curve analysis makes change of support a breeze allowing you to quickly generate grade tonnage curves at any given block size without the need to import a block model. ... This not only applies to mining professionals but also those around the mining industry in supporting roles who attend our introductory courses.

Mineral resource classification - Wikipedia

Mineral resource classification is the classification of mineral resources based on an increasing level of geological knowledge and confidence. In an effort to achieve a standard set the classifications, representative bodies from Australia, Canada, South Africa, the USA and the UK reached a provisional agreement in 1997 on the definitions of each of the various mineral classifications.

The Modifying Factors - CRIRSCO

grade–tonnage curve. This curve depicts various grade-tonnage scenarios which provide different economic returns (different business scenarios). SELECTING THE BEST BOUNDARIES To convert ore commodities into a mine business we need to draw an envelop where ore tonnages, ore grades, and other ore attributes allows generation of

How to Maximize Grade and Recovery Curve- Case of Study ...

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 of a

Grade Tonnage Graphs

A grade tonnage curve combines two or three equations together to produce one of the more important tools for analysing the data indicating the potential amount of material obtained when varying the cut-off grade applied. Leapfrog Geo can display multiple grade tonnage curves on one graph.

Generate Statistics Grade-Tonnage Curve Progeox

Sep 22, 2020  In this tip of the month, we will see how to insert a statistics report and generate a grade- tonnage curve for a block model. This is really useful to quickly analyze the properties of each grade value and to determine the optimal point of obtaining the maximum grade without decreasing the tonnage.

The Modifying Factors - CRIRSCO

grade–tonnage curve. This curve depicts various grade-tonnage scenarios which provide different economic returns (different business scenarios). SELECTING THE BEST BOUNDARIES To convert ore commodities into a mine business we need to draw an envelop where ore tonnages, ore grades, and other ore attributes allows generation of

Grade Tonnage Graphs

A grade tonnage curve combines two or three equations together to produce one of the more important tools for analysing the data indicating the potential amount of material obtained when varying the cut-off grade applied. Leapfrog Geo can display multiple grade tonnage curves on one graph.

Mineral resource estimation - Wikipedia

Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model. There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.

Mining parameters such as tonnage, average grade, Chegg

Mining parameters such as tonnage, average grade, metallurgical recovery, dilution and desired profit are important parameters in the preparation of economic analyses. Given the following information about a stope in Ajith mining block : (7 points) Stope dimensions: 12 m wide, 32 m long, 6 m high. Ore tonnage factor: 0.43 m 3 /tonne

How to Maximize Grade and Recovery Curve- Case of Study ...

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 of a

Mining Parameters Such As Tonnage, Average Grade ...

Mining parameters such as tonnage, average grade, metallurgical recovery, dilution and desired profit are important parameters in the preparation of economic analyses. Given the following information about a stope in Ajith mining block : Stope dimensions: 12 m wide, 32 m long, 6 m high. Ore tonnage

Mineral resource classification - Wikipedia

Mineral resource classification is the classification of mineral resources based on an increasing level of geological knowledge and confidence. In an effort to achieve a standard set the classifications, representative bodies from Australia, Canada, South Africa, the USA and the UK reached a provisional agreement in 1997 on the definitions of each of the various mineral classifications.

Mining Terminology - Hawkeye Gold Diamond Inc.

A mining company will proceed with the cost of a feasibility study generally once it has proved continuity of its ore deposits confirmed by samplings and or drilling on a relatively detailed grid that allows for fairly precise determination of tonnage, density, mineral and metal content and is that part of the orebody that economic viability ...

What Does the Grade of a Gold Mine Refer To?

Feb 07, 2020  World Bank. "Digging Beneath the Surface An Exploration of the Net Benefits of Mining in Southern Africa." Accessed May 8, 2020. Mining. "The world’s highest grade

Improvements in Grade Tonnage Curve Prediction via ...

An application of sequential Gaussian fractal conditional simulation is presented, using actual sparse, irregularly spaced open cut gold data, to predict the grade tonnage curve associated with a single mining bench. It is shown that this constitutes an improvement over the prediction of the grade tonnage curves obtained via standard sequential Gaussian simulation and median indicator ...

(PDF) Cut-off Grade and Hauling Cost Varying with Benches ...

This is an important variable in determining ore-waste hauling cost.The SR is given below:0 SR t tj tj − = (5)Where 0 t material tonnage above 0 cut-off, tj: ore tonnage at any cut-off grade in a benchThe SR depends, mainly, on ore tonnage-grade distribution; it also depends, to some extent, upon thickness, dip and strike of a deposit and ...

Block size selection and its impact on open-pit design and ...

the tonnage vs. cut-off, mean grade vs. cut-off and metal vs. tonnage curves are used. The last represents the metal content (ore tonnage multiplied by its mean grade) as a function of the ore tonnage, and is useful in analysing the support effect as it shows a hierarchy according to the block size. For example, if for the same mined ore ...

(PDF) Assessment of uncertainty in grade-tonnage curves of ...

The grade-tonnage curves for each realisation are plotted and compared with the generated one by the kriging estimate. The MAF approach proves itself to be an efficient method for joint simulation ...