tonnage calculation methods in mining

Reconciliation principles for the mining industry: …

2001-8-9 · 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 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

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Methods for calculating the minimum amortization …

2008-10-13 · calculation, or by adapting the hole pattern to a given demand on the mean fragment size. If the demand is higher than the calculated value, no change of the hole pattern is made. Formulas to estimate mean fragment size are found in Fragmentation Distribution below. 1.7 Limitation with respect to relation Hole Diameter/Bench Height

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Belt Conveyors for Bulk Materials Calculations by CEMA 5 ...

2017-3-9 · Detailed mapping on 1:2,000 or 1:1,000 scale. Pitting, trenching and bed rock sampling on all out- crop sections. Drilling on systematic pattern upto 60 to 120m depth and at 100m strike interval for gold, 200m for base-metals and 400m - 500m for limestone.

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Mineral Deposit Value

2007-3-19 · CHAPTER 11 Mining Technology The Federal Coal Leasing Amendments Act of 1976 charged OTA to assess the feasibility of the use of deep-mining technology on leased areas. With the passage of the Sur-face Mining Control and Reclamation Act of 1977 congressional interest in the study of deep underground mining technology shifted

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UNDERGROUND COAL MINING: FACTORS, COST, AND …

2010-2-2 · sampling methods, random and systematic. Both methods have been used for this investigation. Another consideration is the angle of the surface being photographed. Ideally, the surface should be perpendicular to the camera lens. Fig. 2. Typical image taken in the field for calculation …

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Dilution and ore recovery

2020-4-25 · METHODS OF ORE RESERVE ESTIMATION_EXAMPLE Cedrick Kau. August 18, ... Avoca methods of mining Gideon Gipmai Yowa (August, 2017) Senior Instructor, Mining Eng. Dept., PNG University of Technology. ... In addition, there may be variation in certain methods of calculation, application and interpretation of the contents provided and one should ...

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Metal Value per Tonne

2014-6-4 · Factors including the mining methods in use, variable ore types and mineralogy, different process streams and metallurgical recoveries, changes in work indices, ore source locations, related haulage distances and multiple royalty regimes can all cause

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Ore Reserve Estimation

2017-9-13 · The mining industry is a very risky industry compared to other ... when compared to other evaluation methods, NPV is considered and preferred as a more realistic and reliable tool in project evaluation [6] and thus the decision on the mining investment is ... which is based on the ore tonnage–grade distribution and economic parameters of the ...

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Metal Value per Tonne

Mining Capture the underground world within minutes, without the need for GPS. ... GeoSLAM is pioneering innovative methods of underground mapping and volumetric calculations within the mining sector, combining award-winning software with the most versatile hardware available. ... safe and quick volume and tonnage calculation using SLAM technology;

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Mine call factor issues from a surface mine …

2020-3-17 · This chapter explains the different ways the weight of waste or diverted material can be measured or calculated. Note that the volumetric and per capita methods may only be used by facilities approved to submit annual returns. Methods applicable to all disposal facilities Why do I need to specify how I will calculate tonnages? The levy is calculated on the net tonnage of

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Methods for calculating the minimum amortization …

2020-2-29 · Calculation of Ore Tonnage & Grade from Drill hole Samples. Previous Next ... use a discount factor, but as this factor is either arbitrarily selected or is obtained by obscure methods, the results are no better than guesswork. ... Mining Exploration Process. Gallery Mining Exploration Process . Witwatersrand Gold Deposits.

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Chapter 5: Ways to Calculate Tonnages | Ministry for …

2020-5-2 · This chapter explains the different ways the weight of waste or diverted material can be measured or calculated. Note that the volumetric and per capita methods may only be used by facilities approved to submit annual returns. Methods applicable to all disposal facilities Why do I need to specify how I will calculate tonnages? The levy is calculated on the net tonnage of

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Dilution and ore recovery

NAV stands for Net Asset Value, and what it sounds like is fairly representative of what it is. In mining, NAV is essentially a DCF of a mine’s cash flows, or the net value of the asset. Of course, it is more difficult in practice than in theory.

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Mining method selection by integrated AHP and …

2008-11-12 · Mining Dilution Calculation by Polygons ... The tonnage factor provides the mechanism for the conversion from volume of ore to weight of ore. In the English system, the tonnage factor is normally expressed as cubic feet per ton of ore. ... All methods for the calculation of ore reserves make use of two basic principles: 1) Samples taken close ...

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Optimization of the fleet per shovel productivity in ...

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.

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