Cross section method of ore reserve estimation software

Crosssection of an ore body plunging obliquely with unrotated blocks but if the block model is rotated, a much better representation of the ore body is possible with ore blocks looking like those shown in figure 9. Chapter c national coal methodology for calculating coal. Since a picture is worth words and this table summarizes resources and reserves. Although it is a tank model equation, it can provide great insight for the practicing reservoir engineer. The choice of which kriging method to be used depends on the. The volume of large basinshaped deposits may also be estimated from parallel cross sections on which are plotted intersections or projections of mine workings, drill. Some practical aspects of ore reserve estimation at chuquicamata copper mine, chile prof. Interpolating methods based on other criteria such as. N \displaystyle n samples from a function will be normally distributed, where the covariance between any two samples is the covariance function or kernel of the gaussian.

A mathematical model of a real reservoir is a set of partial differential. A simple and accurate method for ore reserve estimation in. The research method is to collect accurate data at field is associated with reserve estimation. The grade estimate of a possible reserve is a broad indication of the likely quality. The process from importing drillholes, validating the data and modeling the ore to reserve calculations is seamless. Polygons may be constructed on plans, cross sections, or longitudinal sections by drawing perpendicular bisectors of lines connecting sample points.

Geological survey national coal assessment c3 computer technology has it bene. But as ore deposits cannot always be drilled into at regular intervals and because of the human factor, if many holes are drilled, triangular prisms of all degrees of angularity are produced. Crosssection of an ore body plunging obliquely with. To obtain the reserve, the tonnage mined is deducted from the total volume of the orebody. In this study, a reserve estimation attempt in a silver ore deposit was carried out by the help of geographic information systems gis. Cross section of an ore body plunging obliquely with unrotated blocks but if the block model is rotated, a much better representation of the ore body is possible with ore blocks looking like those shown in figure 9. Triangular method article about triangular method by the. A method of ore reserve estimation based on the assumption that a linear relationship exists between the grade difference and the distance between all drill holes. Use carlson geology to manage drillhole data, plus calculate strata models, block models, quantities and qualities.

Apr 29, 2017 basics introduction of all parameters for reserve estimation by volumetric method and production forecasting. Ajabanoko iron ore resource model was developed and the ore reserve estimate carried out using inverse distance method as contained in surpac 6. Resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model. Polygonal method article about polygonal method by the free. Cross section of an ore body plunging obliquely with. Ore is defined as a mineral or mineral aggregate more or less mixed with a gangue, from which a metal or metals can be won at a profit or in the hopes of a profit. 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. Subarna baidya senior research fellow indian institute of. Projects rise up the y axis as work improves geological knowledge and confidence and they move across the x axis with the addition of mining, metallurgical, economic, marketing. Alaphia wright department of mining engineering, university of zimbabwe, p. Iron ore reserve estimation of dallirajahara iron ore complex using level plan method and cross section method 3d ore body modelling using datamine studio 3 software. Ore reserve estimation using localized trend analysis. This method utilizes a distribution curve for each parameter and, through the. The process from importing drillholes, validating the.

Drilling on systematic pattern upto 60 to 120m depth and at 100m strike interval for gold, 200m for basemetals and 400m 500m for limestone. Blalst synopsis matheron, geoslalislical method or the estimation of ore reserves has been developed to the point al which. This method has gradually replaced the conventional method such as polygon and cross section for grade estimation by more mathematical techniques such as kriging. Areas of ore are not connected between levels unless raises have gone through practically on the section. A simple and accurate method for ore reserve estimation in slc mines. Geological survey national coal assessment by laura n. Use of discounted cash flow analysisas a first tool in the economics of the mining industry in the last 30 years, it has become common to define an ore reserve as that part of a mineral resource whose exploitation can generate maximum net present.

The next step is to divide those geological zones into blocks and have estimates of tonnage and grades in each block. Characteristics of nickel ore reserve estimation carried out simulations on the x nickel deposits. Box mp 167, mount pleasant, harare zimbabwe received february 18, 1988. The contribution of mine design software minesight and the recent survey technique called cavity monitoring system cms were presented in this study. All done without a single polyline digitised in section. Exploration activity that has been done is taking samples with a regular distance of 25 m by using a rotary drilling tool. Fractal models for ore reserve estimation request pdf.

Ore reserve estimation methods, models and reality proceedings of the symposium sponsored by the geology division of clm, and held in montreal, quebec, may 1o11, 1986 edited by m. The model may be physical, such as a scaled laboratory model, or mathematical. Ore reserve estimation techniques by cross section method. Methodology for calculating coal resources for the colorado plateau, u. Reserve estimation methods mb1 a general material balance equation that can be applied to all reservoir types was first developed by schilthuis in 1936.

In veintype deposits recognized by drill holes on cross sections at regular. In statistics, originally in geostatistics, kriging or gaussian process regression is a method of interpolation for which the interpolated values are modeled by a gaussian process governed by prior covariances. However, one should understand that all methods of reserves estimation are justified in a sense. The basic method of which authors based is the triangular method, which is very complex and using a computer it is accurate. The results of both methods of reserve estimation obtained estimated values for cross section method larger than the contour method, the estimated difference in the amount of 88007. Heres a music video for you to get you into the swing of rapid geological modelling. Reserve estimation tonnage density free 30day trial. Kriging can also be understood as a form of bayesian inference. Another method which also described here is inverse distance weighting idw technique. The procedure is to select a single value for each parameter to input into an appropriate equation, to obtain a single answer. The volumetric is often the first available to us and can thus help know what to expect. In the third method, where possible, vertical sections are spaced at intervals, up to 50 ft.

Dunn abstract the copper ore reserves at the chuquicamata mine were reestimated during march to june 1994, as part of a comprehensive audit of the mines overall short and longterm planning. Basics introduction of all parameters for reserve estimation by volumetric method and production forecasting. Successful geostatistical approach for a nickel ore deposit. Paper open access ore reserve estimation of saprolite.

Using gis, 3d model of the studied region, most suitable section planes and grade distributions were obtained and reserve estimation by cross section method was approached. Successful geostatistical approach for a nickel ore. Sinclair and m vall6e the canadian institute of mining and metallurgy. The shape of blocks and the estimation method vary with the type of deposit being modeled. A proven mineral reserve is economically mineable part of the measured resource. The polygons are then planimetered to define the area of mineral body. Mining science and technology, 7 1988 161165 elsevier science publishers b.

Blalst synopsis matheron, geoslalislical method or the estimation of ore reserves has been developed to the point al which reallife problcllll may be handled effectively. In veintype deposits recognized by drill holes on crosssections at regular. As the importance of planning and scheduling of an operations mineral endowment became apparent, the use of all types of sample data to define ore reserves increased. The video was constructed from 6 leapfrog mining tutorial videos prepared by jun cowan to introduce novices the basic operation of the software. Indian institute of technology indian school of mines, dhanbad. Since the method of constructing these figures also affects the calculations of ore grade, this subject will be discussed further under the caption, estimation of grade of ore. Topography of the hills with a slope of 300500 and 50230 meters above sea level mdpl.

Optimization of material flow in engineering company 9140 proved that an sqsq regular triangular method m m. Geostatistical ore reserve estimation tutorial geology. Using gis, 3d model of the studied region, most suitable section planes and grade distributions were obtained and reserve estimation by crosssection method was approached. Cross validation diagram for real and estimated values of cu inchelkureh copper ore deposit ok estimator is a proper method in ore control and reserve resource estimation. Subarna baidya senior research fellow indian institute. The possible reserve have the following characteristics. Polygonal method article about polygonal method by the free dictionary. A method of estimating ore reserves in which it is assumed that each drill hole has an area of influence extending halfway to the neighboring drill holes explanation of polygonal method. Pitting, trenching and bed rock sampling on all out crop sections. The standard method is correct when the drill holes are so laid out that the triangular prisms are equilateral in cross section. Reserve estimation free download as powerpoint presentation. Kriging starts with a prior distribution over functions. Kriging is commonly described as a minimum variance estimator. Carlson geology the complete geologic modeling package for both stratigraphic and block modeling use carlson geology to manage drillhole data, plus calculate strata models, block models, quantities and qualities.

Resourcereserve estimation using micromine software gold and base metal practice author. Cross validation diagram for real and estimated values of cu inchelkureh copper ore deposit ok estimator is a proper method in ore control and reserveresource estimation. Paper open access ore reserve estimation of saprolite nickel. The process of simulating petroleum reservoirs has been thoroughly described by peaceman 24 as the. Polygonal method article about polygonal method by the. Chapter c methodology for calculating coal resources for the colorado plateau, u. Krige functioning the optimal assigning of weights to the neighbouring sample values used in estimating the grade of blocks in south african gold mines. Jul 15, 2017 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.