Break Even Analysis - How to Calculate the Cut Off Grade ...

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.

September, 2014 - Mining Intelligence and Technology

Cut-off grade when mining capacity is fixed a n I ntroductIon to c ut - off g rade e stImatIon : t heory and P ractIce In o Pen P It and u nderground m Ines

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT MINING …

economic cut-off grade. For instance, shape of the deposit, bench height, equipment size, and market For instance, shape of the deposit, bench height, equipment size, and market conditions will have an impact on the level of dilution in a mine.

Determination of the Optimum Cutoff Grade Considering ...

Cutoff grade optimization can improve both long-term and short-term cash- flows. Cutoff grade optimization is used for simulation of mining/ processing/ stockpiling configurations to determine which configuration yields the maximum economic benefit.

cut off grade iin mining - elthamlodge.co.za

Cut-off grade determination for the maximum value . Output in some mining operations may be limited by capacity in one of the three stages, mining, processing or marketing and could affect the economic cut-off grade.

Mining Valuation Lesson: Cut-Off Grade Theory And …

Cut-off Grade Theory and Practice Consider a block of ore that weighs 1 tonne and contains 3 grams of gold. At a gold price of US$1000 per ounce the value of the gold in the block of ore is just ...

Cut-Off Grades For Mineral Resource Reporting | SRK

This means knowing the costs and practicalities of mining and processing for a particular product. A cut-off grade (COG) is an industry-accepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE).

Cut-off Grade Optimisation Feb 07 - Whittle Consulting

net value after mining i.e. is above the "marginal cut-off grade" (which is the point where the net revenue value of the metal recovered is equal to the cost of processing it). The illustration used throughout involves an ore body with a marginal cut of grade of 1.0%,

Cutoff grade - Wikipedia

Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste.

Stripping Ratios, Pit Limits & Cutoff Grade Optimization ...

CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining.

Dynamic optimization of cutoff grade in underground …

Abstract. In order to maximize the overall economic gain from a metal mine operation, selection of cutoff grades must consider two important aspects: the time value of money and the spatial variation of the grade distribution in the deposit.

Mining Valuation Lesson: Cut-Off Grade Theory and …

If you increase the cut-off grade, you decrease the life of the mine due to diminishing reserves (reserves are ore in a deposit that is economical to extract, see Mining 101: It's Not that Simple), but you would increase gold production due to the higher grade.

Break-even is broken - AusIMM Bulletin

The cut-off grade used by most mining companies for the 'process/do not process' decision, rightly or wrongly, is the break-even cut-off grade. The break-even grade is defined as the grade at which revenue obtained is equal to the cost of producing that revenue.

Optimal cut-off grade determination based on variable ...

Optimal cut-off grade determination based on variable capacities in open-pit mining purpose, they incorporated optimal choices of the capacities and their allocations at the margin during the model.

Understanding Cut-Off Grade 4 (Tonnage, Grade, and …

As mentioned in my previous articles, I believe that cut-off grade is probably the most important factor in establishing the potential economic value of a mineral deposit or mining operation.

Modern Strategic Mine Planning - Inside Mines

definition (cut-off grade determination), ore access mechanics (shaft location, pit size), and ore and waste removal sequences. The decisions are updated through time, usually

Mining cutoff grade strategy to optimise NPV based on ...

Cut-off grade optimization algorithms have been developed in the past The most common criteria used in cut-off grade optimization is to maximize the net present value (NPV). This paper describes ...

The choice of the cutoff grade in mining - ScienceDirect

Introduction. The choice of the cutoff grade in mining influences the profitability and life of individual mines and thereby the quantity of a resource that is available to society.

What is cut-off grade? An introduction to overlooked yet ...

Within mining professionals there is a lively debate as to what costs should be included in cut-off grade and what costs should be left out. A few tricks can useful for determining what is a reasonable.

Making the grade: understanding exploration results ...

The most exciting news from a mining exploration stock is a high-grade drilling result. But what constitutes a good assay? It varies from situation to situation and commodity to commodity.

Cut-off grade estimation - QueensMineDesignWiki

Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste.

Mining Cutoff Grades | Aussie Stock Forums

2006-05-12· A cut off grade defines what you will mine for a profit. It will vary for every mineral, for every location, and reflect geological conditions and prevailing metals prices.

(PDF) Influence of the ore block model estimation on the ...

Strategic mine planning includes different cut-off grade policy depending on economic parameters of mining projects and grade-tonnage distribution of the deposit.

cut off grade iin mining - zelba.eu

Applications: Secondary medium & fine crusher in mining, quarry, mixing and batching plant, road and building construction, highway, railway and subway, and water conservancy.