• SciELO

    Using a script developed to compare pairs of grids (each of them representing a surface), the surfaces were sampled and compared at regularly spaced grids (1 m x 1 m), so that the elevation was the only variable for the sampled points from this regular mesh. The algorithm uses the XY plan to needle the surfaces and record the Z interception value.

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  • Efficient Estimation of Triangles in Very Large Graphs

    This paper proposes a new method to estimate the number of triangles based on random edge sampling. It improves the traditional random edge sampling by probing the edges that have a higher probability of forming triangles. The method outperforms the traditional method consistently, and can be better by orders of magnitude when the graph is very large. The .

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  • triangular method

    Krumlauf Source: Dictionary of Mining, Mineral, and Related Terms triangular method A method of ore reserve estimation based on the assumption that a linear relationship exists between grade difference and the distance between all drill holes.

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  • Statistical Methods for Health Actuaries IBNR Estimates: An ...

    In this document, we illustrate how to use statistical methods to estimate unknown values and create confidence intervals in the context of setting reserves for health (other than disability) insurance claims that have been incurred but not reported (IBNR). Two general statistical approaches used in developing estimates and corresponding confidence

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  • Weisbach Triangle Method

    triang, reserve estimation by the triangle method mining, surveying amp geomatics forum eng tips, what are the methods to transfer surface coordinates to, setting out underground works underground surveying, underground survey maptek com, weisbach triangle method of surveying, weisbach triangle webref org, mine planning design and scheduling deswik, www .

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  • Cost Estimation Methods – All You Need To Know

     · Pessimistic (P) – in this, the estimates are based on the worstcase scenario. Based on the range of values from the above three estimates, we calculate the expected cost, cE, using a formula. Two popular formulas are Triangular Distribution E = (O+M+P)/3, and Beta Distribution E = (O+4M+P)/6.

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  • Understanding Actuarial Methods

     · The incurred loss development method is one of the most frequently used actuarial methods. Incurred losses (case reserves plus paid losses) are multiplied by an incurred loss development factor to determine an estimate of ultimate losses. The assumptions related to the incurred loss development factor are important. If no unique history (loss ...

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  • Mineral Resource and Ore Reserve Estimation

    Monograph 30 Mineral Resource and Ore Reserve Estimation The AusIMM Guide to Good Practice. This updated version remains nonprescriptive, supports consistency with the 2012 JORC Code and describes contemporary tools, techniques, software and case studies. It provides additional examples of good practice while revising the 2001 volume ...

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  • The mineral reserves reserves estimation using triangular methods

    It includes the introduction about mineral reserves. It also introducing triangular method to estimate the mineral reserves. Here after solving related problem.

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  • Monte Carlo Methods and Area Estimates

    Monte Carlo Methods ... • The previous discussion leads to a method for estimating the area / volume of an arbitrarily shaped object • We only need to be able to test whether or not a point is inside the object. Estimating Areas Via Monte Carlo • Procedure: generate a uniformly distributed random point in some enclosing rectangle of area A and test whether it is inside or outside the ...

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  • Dilution and ore recovery

    Mining Reserves (Tm): The ore tonnage within the planned stope limits Unplanned Waste ... Estimation Method: Manual and automatic estimation methods tend to overestimate grade and underestimate tonnes. Cutoff grade and grade control: When cutoff grade is applied to a deposit, the engineer assumes that the grade contacts are definable at any given grade. External .

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  • GT Gold announces maiden Mineral Resource Estimate for

     · For open pit, mining costs of /t, with an additional incremental depth cost Processing, General and Administrative costs sum of /t Open pit wall angle of minus 45 degrees 1...

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  • reserve estimation by the triangle method mining

    Calculation of Ore Tonnage Grade from Drill hole Samples. Jan 21, 2016 The orebody on which I used this method contains several hundred million tons of ore, and several systems were used to estimate the copper content, viz., the socalled "standard" method of prism calculation; a planimeter method for obtaining areas, checked by logarithms; the Harding angular system of .

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  • Methods for valuating earlystage mineral projects

     · Any of approaches should not be used as standalone valuations methods for any rigorous valuation of advanced mining projects or operating mines. By estimating both market and fundamental values for the comparables, rather than only the market value of the comparables, the valuator is able assess how the market is really valuing projects relative to .

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  • Ore reserve estimation methods pdf

     · This short course will consider the detailed methodology of various resource/reserve estimation methods that are in common use in the Mining Industry. Emphasis will be on general procedures, inherent assumptions, and advantages and limitations of each of the principal methods. Methods to be discussed include: polygonal estimation, nearest neighbour .

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  • BLOCK MODEL KNOWLEDGE FOR MINING ENGINEERS – AN INTRODUCTION .

    In these packages, the blocks are assigned a grade by one of a number of different estimation methods: Inverse Distance Squared, Ordinary Kriging, Multiple Indior Kriging, and so forth. The following sections explain these concepts further. MODEL FRAMEWORK

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  • Geostatistical Ore Reserve Estimation

    estimation, tllat is, samples characterized by a specific volume, shape and orientation. The problem of site of the s1lUPles musi'l>Cfaceaana itsbearing OD too variogram 2:y(k) must be analyzed. If the intrinsic hypothesis does not hold, that is, if drift is pre:>ent, wc become concerned with the intrie problems of

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  • Kriging: Understanding allays intimidation

    Computer contouring methods can be grouped into two families: triangulation and gridding. The former is a direct procedure in which the contour lines are computed straight from the data by partitioning the sampling area into triangles with one observation per vertex. Kriging belongs in .

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  • Financial Reporting in the Mining Industry

    International Financial Reporting Standards (IFRS) provide the basis for financial reporting to the capital markets in an increasing number of countries around the

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  • reserve estimation by the triangle method mining

    Loss Reserve Triangles The loss reserving triangle is the standard method for maintaining loss data. While the entries vary for different methods, the use of the triangles is always the same. 12 months 24 months 36 months 48 months 60 months 2001 59,500 70,400 71,700 72,000 71,900 2002 64,200 76,700 77,600 77,700 2003 58,400 72,800 73,900

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  • Geostatistcal Methods of Ore Reserve Estimation | Semantic .

    Geostatistcal Methods of Ore Reserve Estimation. J. Rendu. Published 30 June 1984. Geology. Mining geology. The economic value of a mineral deposit is first a function of its ore reserves. During the exploration and feasibility phases of a mining project, the need for timely and reliable ore reserve estimates is of critical importance ...

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