Methods Of Calculating Tonnage In Mining

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Methods Of Calculating Tonnage In Mining

Reserve estimation of central part of Choghart north .

Reserve estimation of central part of Choghart north .

Drawing grade-tonnage curves needs to finding the tonnage of different grades. To find the tonnage of each block, the specific gravity of ore and core recovery percent is required. So according to this data, we could calculate the deposit based on different cut-off grades. Fig. 8 shows the grade-tonnage curve of Choghart north anomaly iron ore .

Sampling - Michigan Technological University

Sampling - Michigan Technological University

Sampling Calculations Using Gy's Method References: • Gy, P. M. (1979), Sampling of Particulate Materials: Theory and Practice, Elsevier • Wills, B. A. (1992), Mineral Processing Technology, 5th edition, Pergamon Press, pg. 79 Use: This method is a general-purpose calculation to determine the minimum size of sample needed to

Equipment Selection for Surface Mining: A Review

Equipment Selection for Surface Mining: A Review

Mining trucks, also called haul trucks or o -road trucks, haul the ore or waste material from the loader to a dumpsite. More commonly, these vary from 36 tons to 315 tons. The size and cost of operating mining trucks is directly proportional to its tray capacity, while the speed at which the truck can travel is inversely proportional to its .

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

A long hole stoping system for mining narrow platinum reefs

A long hole stoping system for mining narrow platinum reefs

A long hole stoping system for mining narrow platinum reefs Advantages of this mining method It allows for a low safety and health risk as well as improved working environment. Physical work is reduced and it is easier to motivate the workforce. Another advantage is the improvement in .

How Cost Contingency is Calculated? - Project Control Academy

How Cost Contingency is Calculated? - Project Control Academy

In deterministic methods, contingency is estimated as a predetermined percentage of base cost depending on the project phase. Contingency= % x Base Cost Estimate. In this technique, you take a percentage of the cost of the project and calculate the contingency amount. To do so, you need to have an expert judgment or use some predetermined .

Valuation of Aggregate Operations for Banking Purposes .

Valuation of Aggregate Operations for Banking Purposes .

Crushed stone was 9.78 per ton – varying from roughly 4.00 per ton to nearly 20.00 per ton depending on location and grade of material ! Sand and gravel was 7.65 per ton - varying depending on location and grade from 3.50 per ton to more than 15.00 per ton loaded on trucks at the mine.

Fuer Homepage Valuation of Metals and Mining Companies

Fuer Homepage Valuation of Metals and Mining Companies

when valuing metals and mining companies. Chapter 5, 6 and 7 describes Discounted Cash Flow, Multiples and Real Options methods and discusses applications for metals and mining companies. Chapter 8 is a practical chapter. A copper mining group, Antofagasta, is valued with different valuation methods. 1.3 Definition of terms

Construction Planning, Equipment, CHAPTER TRUCKS AND .

Construction Planning, Equipment, CHAPTER TRUCKS AND .

given below, when it is hauling a load of 22 tons up a 6% grade on a haul road having a rolling resistance of 60 lb per ton: Engine: 239 fwhp Capacity: Struck, 14.7 cu yd Heaped, 2:1, 18.3 cu yd Net Weight (empty) = 36,860 lb Payload = 44,000 lb Maximum Speed 6.5 mph (from Figure 1, or Fig. 10-9 Text) 6 9% 20 60 Total Resistance rr gr

Calculation methods – conveyor belts

Calculation methods – conveyor belts

machine, the calculation methods here are based on general, simple physical formulae and derivations backed up by factors (c 2) that include a safety margin. In the majority of cases the safety margin used for calcu-lation in this brochure will be larger than for the corresponding B_Rex calculation.

Earthwork Volume Calculation Methods - LinkedIn SlideShare

Earthwork Volume Calculation Methods - LinkedIn SlideShare

Sep 02, 2014 · Earthwork Volume Calculation Methods 1. Volume Calculation that adopted to find earthwork quantities for various civil engineering projects like: • Road Work • Irrigation Canal project • Tank Survey • Earth Moving • And etc. 2. Earthworks - created through the moving and/or processing of massive quantities of soil or unformed rock. .

Ore Reserve Estimation Method

Ore Reserve Estimation Method

The tonnage in each block of ore is, of course, the volume in cubic feet divided by the cubic-feet-per-ton factor (or similar calculations for metric units). When it comes to actual mining, it often happens that the tonnage is greater and the grade of ore lower than estimated. This often is due

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

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

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

 2012 Americas School of Mines

2012 Americas School of Mines

Mining Methods 8 Porphyry copper, 170,000 tons mined/day (tpd) 451 Mt reserves: 0.38% Cu, 0.007% Mo (2007 Teck Cominco report) 90% of production from Valley pit Copper concentrate with gold and silver, Molybdenum concentrate N Valley Pit H‐H tailings dam Concentrator

MANAGEMENT OF MINING, QUARRYING AND ORE .

MANAGEMENT OF MINING, QUARRYING AND ORE .

management of mining, quarrying and ore-processing waste in the European Union. This project was completed mainly through the use of questionnaire sent to sub-contractors in almost each country of the EU. To assess this information and to extrapolate to the next twenty years, this approach has been reinforced using published

How Do I Estimate the Value of Mineral Rights? | Home .

How Do I Estimate the Value of Mineral Rights? | Home .

If royalties paid on coal are 4.30 a ton, then multiply that by the 540,000 tons of coal extractable using the underground method to arrive at a mineral rights value of 2,322,000 for the 100 .

ORE RESERVE ESTIMATION - MineTech Int

ORE RESERVE ESTIMATION - MineTech Int

one area. The tonnage actually mined vtas computed f rom channe I sample s 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

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

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

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

ESTIMATING EARTHWORK - CAE Users

ESTIMATING EARTHWORK - CAE Users

CONTOUR LINE/GRID CELL METHOD(cont.) Step l Determine by visual study of the site drawing if the net total will be an import (more fill required than cut) an export (less fill required than cut) or a blend (cut and fill about equal) Step 2 Determine the pattern of calculation points or grid size.

Technical Document: Acid Mine Drainage Prediction

Technical Document: Acid Mine Drainage Prediction

mining ventures, as a major problem facing the future of metal mining in the western United States (U.S. Forest Service 1993). Acid mine drainage from coal and mineral mining operations is .

Narrow-vein modelling and Mineral Resource estimation .

Narrow-vein modelling and Mineral Resource estimation .

Narrow veins are major sources of many commodities, including gold, silver, tin, tungsten, coal, uranium and sometimes copper, lead and zinc. Mining this narrow style of mineralization can be considered as relatively high risk, not only due to the high cost of exploration and mining per unit of metal, but also to the frequently limited size of the resource.

Mining Valuation Techniques - P/NAV, P/CF, EV/Resource

Mining Valuation Techniques - P/NAV, P/CF, EV/Resource

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 .

Narrow-vein modelling and Mineral Resource estimation .

Narrow-vein modelling and Mineral Resource estimation .

Narrow veins are major sources of many commodities, including gold, silver, tin, tungsten, coal, uranium and sometimes copper, lead and zinc. Mining this narrow style of mineralization can be considered as relatively high risk, not only due to the high cost of exploration and mining per unit of metal, but also to the frequently limited size of the resource.

Explain and Apply Depreciation Methods to Allocate .

Explain and Apply Depreciation Methods to Allocate .

68 Explain and Apply Depreciation Methods to Allocate Capitalized Costs . In this section, we concentrate on the major characteristics of determining capitalized costs and some of the options for allocating these costs on an annual basis using the depreciation process.

Coal Mining and Processing - The National Academies Press

Coal Mining and Processing - The National Academies Press

Although the United States has the vast coal resource described in the previous chapter, perhaps as much as 4 trillion tons, the key issue for policy makers is the amount of coal that is economically recoverable.This is not a fixed quantity, but depends on the geological resource, the market price, and the cost of mining. The particular characteristics of the coal mining industry create unique .

Coal mining - Choosing a mining method | Britannica

Coal mining - Choosing a mining method | Britannica

Choosing a mining method. The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic, and social factors.

CHAPTER 11 Mining Technology - Princeton University

CHAPTER 11 Mining Technology - Princeton University

the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams. The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in

Depletion method of depreciation - explanation, formula .

Depletion method of depreciation - explanation, formula .

Depletion method of depreciation is mostly used by the companies that have assets that are natural resources like oil, gas, coal, mines, quarries or other wasting assets.. This method is named as 'depletion method' because the reduction of a natural resource or asset is known as depletion of that resource or asset and thus is used to depreciate assets that are natural resources.

Cut-off grade estimation - QueensMineDesignWiki

Cut-off grade estimation - QueensMineDesignWiki

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. approved by a .

Calculation methods – conveyor belts

Calculation methods – conveyor belts

machine, the calculation methods here are based on general, simple physical formulae and derivations backed up by factors (c 2) that include a safety margin. In the majority of cases the safety margin used for calcu-lation in this brochure will be larger than for the corresponding B_Rex calculation.