In the English system, the tonnage factor is normally expressed as cubic feet per ton of ore. In the metric system, the tonnage factor is the specific gravity of the ore. Probably the most accurate method of determining specific gravity of an ore is to calculate an average specific
In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock.
Please use this calculator to select which product you would like to calculate the total tonnage estimated for your project. You will need the length, width and depth of your project space to be able to get your estimated tonnage calculation. Our calculator provides an average unit weight per product and should only be used for estimating purposes.
Applications of Queuing Theory for Open-Pit Truck/Shovel Haulage Systems Meredith Augusta May Abstract Surface mining is the most common mining method worldwide, and open pit mining accounts for more than 60% of all surface output. Haulage costs account for as much as 60% of the total
Economic Surface Mining of Multiple Seams By THOMAS V. FALKIE' :md WlLLIAM E. PORTERt SYNOPSIS A, Xeological and mining conditions become more complex, and as overall mining economics become more marginal, short-and long-range decision-making regarding muIliple-scam surface mining becomes more difficult.
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 ...
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
The results of carrying out this method through a complete orebody of a large tonnage seem to justify the labor involved therein—the tonnage checks with the standard method to within 1.014 per cent.—the standard method showed about 55,000 metric tons less copper and the percentage, by the standard method, was about 0.0242 per cent. less.
Lane’s Method. Lane's Method was presented by Ken Lane in 1988 when he identified three distinct stages of cut-off grade application; mining, concentrating, and processing. He related these steps to the concept of Net Present Value to create a method of cut-off …
tonnage calculation methods in mining machine. tonnage calculation methods in mining machine Corhart, Corhart Suppliers and Manufacturers at Alibaba It depends on the Drive of ribbon of the blender, make the Inner and outer ribbon mix the material in a relative wide scope. 4In the operation, if find machine shake unnormal or with abnormal noise, should immediately …
THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT MINING PROJECTS* Anoush Ebrahimi, P. Eng., Ph.D. ... Financial models calculate revenues by using tonnage and grade of ore which is determined ... Factors that are related to mine operation comprise the mining method, mine geometry, mining .
mining method economics 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 blocks and then to simulate the mining method afterwards to obtain the minable reserves. The problem
project sites, where their size and costs are justified. CHAPTER 10. TRUCKS AND HAULING EQUIPMENT ENCE 420 ©Assakkaf Slide No. 5 TRUCKS CLASSIFICATIONTRUCKS CLASSIFICATION Trucks may be classified according to a number of factors including: 1. The size and type of engine-gasoline, diesel, butane, propane 2. The number of gears. 3.
In extraction and mining industry, entities have fixed assets mines, quarries and wells to extract natural resources like coal, oil, timber, metal, salt etc. Unlike property, plant and equipment that are used during the period, these assets get consumed as a result of extraction. For such assets, depreciation is calculated using depletion method.
methods of calculating tonnage in mining. Calculation of Ore Tonnage & Grade from Drill hole Samples. Mar 19, 2017 The area of each prism, which is given in the figure, was calculated by the method just outlined and the results of the calculation of tonnage and grade of the ore content are shown in .
For conducting a mining project’s break even analysis, you first need to know about the operational expenses (OPEX).When the OPEX is known, you can calculate the mineral’s cut off grade, which is the break even grade, below which it is not economically viable to mine the ore.To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isn’t available, I refer you ...
The issue of balancing dilution and ore recovery is a challenging one as profitability is to be optimized while not effecting the efficiency of operation. It has been noted that instead of utilizing labour intensive mining methods to high tonnage bulk mining has decreased the ability to control ore recovery.
The main mining valuation methods in the industry include price to net asset value P/NAV, price to cash flow P/CF, total acquisition cost TAC & EV/Resources. The best way to value a mining asset or company is to build a discounted cash flow (DCF) model that takes into account a mine plan produced in a technical report
Nov 23, 2003· anticipated mining and grade control methods and size and type of equipment. In block modeling, the size of the blocks in the model will be chosen to best match mining selectivity and the anticipated grade control method, sample density and sample statistics. In the case of computer based modeling, the QP responsible
taken during the mining cycle. This \'ras comlnred to the esti'rnated tonnage predicted by the three methods, again using drill hole data available prior 1985 CIM SltmPosium Ore reserve estimati-on: methods, models and realitY. H. G. SHERWOOD Technical- University Nova Seotia to mining and then all available drill hole data.
Each of the models is developed from first principles based on typical mining criteria for rock densities, swell factors, drill penetration rates, etc. Industry-standard estimating methods are used for equipment selection, personnel allocation, and cost estimation. These models are invaluable for early order- of-magnitude estimates.
Jun 15, 2018· This is the one of method for calculation of reserve of ore .
Estimates of the tonnage and average grade of ore deposits (ore-reserve estimates) are made for various purposes. They may be made by examining engineers as a basis for placing a value on a mining property in connection with reports on behalf of owners or vendors, on the one hand, or for prospective purchasers or lessees, on the other.
length along exploration or mining works, the tonnage-cutoff and average grade-cutoff models are constructed, which are applicable in both exploration and operating mine environments. Via these models, the relationships between ore tonnage, metal tonnage and cutoff are obtained in terms of the fractal model of element concentrations.
Department of Mining, Dressing and Transport Machines AGH Belt Conveyors for Bulk Materials Calculations by CEMA 5th Edition Piotr Kulinowski, Ph. D. Eng. Piotr Kasza, Ph. D. Eng. - [email protected] ( 12617 30 92 ... Size Very fine—100 mesh and under
Feb 27, 2016· Mining is the mother industry for other industries. For effectiveness in mining, different methods have been approached keeping in mind the production and safety. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods. 3.
COST ESTIMATION FOR OPEN PIT MINES: TACKLING COST UNCERTAINTIES. ... "Total Mining cost per ton ... A method is presented to calculate the cost of …
Before you can calculate the potential mineral deposit value, you first need to gather some specific data regarding the ore body and the individual drill results.. This required data can be found in the mining company’s press releases in which they announce their drill results.Make sure that this data is announced according to the guidelines of National Instrument 43-101 (i.e. …
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 (see below) used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.
Tonnage-cutoff model and average grade-cutoff model for a single ... The cutoff has great influence on the reserve and resource calculation. ... of constant length along exploration or mining works, the tonnage-cutoff and ... found to be consistent with the results obtained by the traditional geometric block method. Get Price
SCREEN CAPACITY CALCULATION ... Mining and Recycle industries. The company also sponsors independent research when appropriate and has coordinated joint ... “A”, the calculated capacity per square foot of screen area in tons per hour. B = Basic capacity per square foot in tons per hour (One ton …
Room and pillar (variant of breast stoping), is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof overburden.Calculating the size, shape, and position of pillars is a complicated procedure, and is an area of ...