Tonnage Calculation Methods In Mining
Grade/Tonnage Curves and Optimization of a Mining Project …
Since its beginning, with the works of D. Krige and later, G. Matheron, geostatistics has been analyzing in detail the essential factors at play in ore reserves estimation problems, with the ever-present aim of an optimal use of the available information. Not only do the reserves depend on the geological in situ resources, they also require a correct appraisal of many technical and …
Tonnage-cutoff model and average grade-cutoff model for a …
Given the mineralized zone mass, the tonnage-cutoff and average grade-cutoff models can be utilized to calculate ore reserve and average grade, especially when the cutoff …
Reserve Estimation Through Conventional Method and …
The relative difference in tonnage estimation was 18.38% by cross-sectional method whereas it was 7% by Minex software. The Minex software is effective for tonnage estimation for the coal deposit, as shown by the minimal relative difference in tonnage estimation with the actual production.
3 Calculation of Volume and Tonnage of Ore Deposit
For the calculation of the volume and the tonnage of ore deposits there is a va riety of available methods to choose from, each suited for a particular deposit. These methods fall into two …
Ore Reserve Calculations
and the grade becomes 4· 50% by the metre-% method and 4· 27% by the percentage method. The triangular method is better than the 'area of influence' methods and, if there is either positive or negative correlation between grade and thickness, it is better to use the percentage method in calculating the mean grade.
Grade Tonnage Curve: How Far Can It Be Relied Upon?
Usually the grade tonnage curve is not calculated with mineable reserves which depends on the mining method: geometry, spatial location and topological relations between ore and waste …
Tonnage Calculator
The word "tonnage" itself can mean a lot of things. We can use tonnage to describe the sizing of an HVAC system or how much a ship weighs. Basically, tonnage is the weight in tonnes (or tons for short) of massive …
A Simulation Model for Estimation of Mine Haulage Fleet Productivity
A good estimation of haulage fleet productivity is a pivotal input to determine the mine fleet requirement. In open pit mining, the two major factors affecting the fleet productivity are the planned tonnage to be moved, that is based on the long-term production schedule, and the time it takes to move the dirt tonnage which depends on the mine road network.
Quantifying Mineral Resources and Their Uncertainty …
Mineral resources are typically quantified by estimating the grade–tonnage curve for different resource categories. Statutory resource assessment reports (e.g., NI-43-101), however, do not include a measure of uncertainty for the disclosed resources despite the major investments required for mining projects. Although conditional simulation can provide …
Resource Estimation Methods | SpringerLink
The chapter reviews the non-geostatistical estimation methods, the most common of them, are polygonal, triangulation, cross-sectional and estimation by the panels (blocking). Another method which also described here is inverse distance weighting (IDW) technique. This...
Analyzing Stability Conditions and Ore Dilution in Open Stope Mining …
Ore dilution is a fundamental problem for the production process in underground mining operations. Especially in open stoping methods of underground mining, the continuous estimation, monitoring and treatment of instability issues is considered necessary in order to maintain the consistency of the production process. This paper aims to combine empirical …
Gravity and magnetic data processing further constrained …
The tonnage calculation and 3D modelling by gravity and magnetic data processing further constrained Cartesian cut cell inversion 'study' is the first to be carried out for the deposit, it was a detailed tonnage calculation and modelling to advocate the power, reliability and the importance of the aborded approach, which minimises the cost ...
Grade Tonnage Curve: How Far Can It Be Relied Upon?
This study aims at calculating the grade tonnage curve by incorporating the blocks continuity and the uncertainty attached to it. For this purpose, in a first step, a set of ... With all the rigour to calculate a constrained (by the mining method) grade tonnage curve it is first necessary to calculate (estimate or simulate) the resources in ...
Tonnage Estimation for Mining Applications | True …
Tonnage of Ore Calculation. This calculator provides the calculation of tonnage of ore for mining engineering applications. Explanation. Calculation Example: The tonnage of ore is an important parameter in mining engineering, as it determines the amount of material that can be extracted from a mine. It is calculated using the formula T = Q * C ...
Significance of the" cut off-average grade-tonnage" …
The sensitivity analysis applied to the grade-tonnage relationship in mining projects is a recognized stage in all existing quality standards. ... and after the ease of calculation ... the methods ...
A simple and accurate method for Ore Reserve estimation …
Conversion of Mineral Resources to Ore Reserves requires a multidisciplinary approach and application of a number of Modifying Factors. The Modifying Factors for mining, particularly dilution and recovery in a caving mine are complex and can be difficult to determine. Cave flow modelling software is widely used for mine planning, scheduling and forecasting metal …
Gravity and magnetic data processing further constrained …
The preliminary stage for tonnage calculation was residual anomaly processing and depth estimation of the orebody using spectral analysis method. However, progressing towards extracting the deposit signature, the used method leads to invest the gravity signature of the orebody in adequacy with the magnetic signature.
Geostatistical Ore Reserve Estimation
The development of geostatistics as an ore reserve estimation methodology emerged in France in early 1960 from the work of Matheron (1962) and was based on original studies by D.G. Krige functioning the optimal assigning of weights to the neighbouring sample values used in estimating the grade of blocks in South African gold mines.
Review of Mathematical Models Applied in Open-Pit Mining
BEV—is block value, $, T—is block tonnage, To—is tonne of ore in the block, n—is the period number, R—is the recovery, P—is unit price, $/unit, C p —is processing cost, $/tonne, C m —is mining cost, $/tonne, G nw —is the block grade in a set of equally probable grade-tonnage curves (w), P ni —is the ith price in the nth ...
(PDF) Grade and tonnage models
In book: An analysis of Nevada's metal-bearing mineral resources (pp.Chapter 11, p. 11.1–11.18) Chapter: Grade and tonnage models, Ch. 11; Publisher: Nevada Bureau of Mines and Geology
CaLCULaTIOn MeTHODS – COnveYOR beLTS
calculation methods shown here are based on general, sim-ple physical equations, supplemented by certain factors that include a safety margin. In the majority of cases, the safety margin in calculations in this brochure will be greater than in the corresponding b_Rex calculation. Further information on machine design can be found in
(PDF) Gravity and magnetic data processing further …
The tonnage calculation and 3D modelling by gravity and magnetic data processing further constrained Cartesian cut cell inversion 'study' is the first to be carried out for the deposit, it was a detailed tonnage calculation and modelling to advocate the power, reliability and the importance of the aborded approach, which minimises the cost ...
MINERAL RESERVES ESTIMATION BY USING TRIANGULAR METHOD …
3.calculation of reserves using weight age average thickness . For this case the following equ is used: weight age ave. thickness, tw =( (t1 Ѳ 1+t2 Ѳ 2+t3 Ѳ 3)/60 )÷3 = (t1 Ѳ 1+t2 Ѳ 2+t3 Ѳ ...
Production Lifetime
mines, that mining progress should be around 50 vertical m/a. Hence the annual tonnage is 300× 50 × 1.5 × 2.6 = 58500 t/a, i.e. 60000 t/a. 8.1.3 Calculating the Optimal Lifetime 8.1.3.1 The Taylor-Formula for Calculating Optimal Lifetime Taylor (1977) empirically arrived at a formula for the optimal lifetime of a deposit: (8.1) or (8.2)
Grade/Tonnage Curves and Optimization of a Mining Project
Since its beginning, with the works of D. Krige and later, G. Matheron, geostatistics has been analyzing in detail the essential factors at play in ore reserves estimation problems, with the ever-present aim of an optimal use of the available information. Not only do the reserves depend on the geological in situ resources, they also require a correct appraisal of many technical and …
Ore Dilution & Recovery in Mining
At Inspiration, 110 percent of the estimated tonnage and more than 85 percent of the metallic contents are recovered. At Miami, operations in 13 completed stopes or blocks resulted in the recovery of 2.4 percent more copper than had been estimated previously, but 15.15 percent more tonnage was drawn, the average grade being 88.93 percent of the ...
Ore Reserve Estimation Method
Ore Tonnage Calculations. Tonnage estimates are derived from those of volume by applying a specific gravity or "tonnage" factor.
Calculation and Management for Mining Loss and …
culation. It is mainly applied to the mining field stoped by such mining methods as short-hole shrinkage stoping, filling method, full mining method and room-and-pillar method [6]. All calculation parameters of loss rate and dilution rate shall be designed on the mining design drawing. Extrac-tion and inbreak scope shall be designed according ...
DETERMINATION OF OPTIMAL MINING CUT-OFF GRADES: …
m: Mining cost in ter ms of $ per ton of material mined c : Concentrating cos t in terms of $ per to n of material mi lled r : All smelting, ref ining and marketing costs in $ per ton
What is reserve estimation in mining?
In mining, ore resource and reserve estimation is used to determine both the quantity and quality of an ore deposit, also called tonnage and estimated economic value. It can be performed initially to assess mineral resources, but also along the mining process to calculate the remaining ore reserves.
Mineral Deposit Value
When a preliminary feasibility study for a mineral project is not yet complete, but you want to estimate the mineral deposit value, you can use the back-of-the-envelope calculation described in this article.. Before calculating the potential mineral deposit value, gather specific data about the ore body and individual drill results.This data can be found in the mining company's press ...
Tonnage-cutoff model and average grade-cutoff model for …
This calculation process is repeated each time the cutoff changes to obtain the relationships between ore tonnage, average grade and cutoff. Theoretical principles and practical applications of the traditional methods have served mining for decades, and have become much easier with the aid of modern programming (David, 1974).