Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

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MINING AND METALLURGY INSTITUTE BOR YU ISSN: 1451-0162<br />COMMITTEE OF UNDERGROUND EXPLOITATION OF THE MINERAL DEPOSITS UDK: 622<br />UDK: 681.51:622.271 (045)=20<br />Daniel Kržanović ∗ , Radmilo Rajković * , Miodrag Žikić ∗∗<br />APPLICATION THE SOFTWARE PACKAGES WHITTLE AND GEM-<br />COM FOR CALCULATION THE BALANCE RESERVES OF COPPER<br />ORE IN THE SOUTH MINING DISTRICT DEPOSIT MAJDANPEK ∗∗∗<br />Abstract<br />Application of software for calculation the reserves in a modern geological and mining science<br />and practice enables the short term look at a number of variants and finding out the best solutions.<br />The obtained results had satisfactory quality and accuracy, and according to the international<br />standards.<br />This paper presents the application of software Whittle and Gemcom for a (Code) of calculation<br />the balance reserves of the deposits South Mining District Majdanpek.<br />Key words: software packages Whittle and Gemcom, deposit, South Mining District Majdanpek,<br />balance reserves.<br />1. INTRODUCTION<br />Balance reserves of solid mineral deposits<br />are deposit parts that can be profitably<br />mined by the existing techniques and<br />technology.<br />Balance of reserves is determined by<br />prescribed techno-economic analysis.<br />It is necessary to adopt previously the<br />appropriate criteria for determining the balance<br />of reserves, i.e. to adopt the limit values<br />of some natural indicators, which relate to<br />the quality of mineral resource and mining–<br />technical conditions of exploitation.<br />In a case of the copper deposits South<br />Mining District, maximum depth of exploitation,<br />maximum allowed value of<br />overburden ratio and minimum, i.e.<br />maximum average content of useful components<br />in deposit are very important for<br />determining the balance of reserves.<br />After previous development the block<br />model of deposit as well as determined<br />initial parameters (costs of exploitation and<br />processing, losses, dilution, investment and<br />price of final products), it is possible to<br />∗ Mining and Metallurgy Institute Bor<br />∗∗ Technical Faculty in Bor<br />∗∗∗ The work has resulted from the Project No. 33038 “Improving the Technology of Copper Ore<br />Mining and Processing with Monitoring of Living and Working Environment in RTB Bor<br />Group”, funded by the Ministry of Education and Science of the Republic of Serbia<br />No 4, 2011. 87<br />MINING ENGINEERING
access the deposit optimization in the<br />Whittle software package.<br />Many variations of the open pit, in a<br />contour of limit copper content 0.15%,<br />specifically 86 variants, were analyzed to<br />select the best contour of balance reserves.<br />Then, the open pit was designed in the<br />software Gemcom, and based on it, a calculation<br />of balance reserves was made, for<br />which Gemcom was also used, and it is its<br />module Volumetrics.<br />2. THE APPLIED METHODS OF<br />RESERVE CALCULATIONS<br />Mini-block method was used for calculation<br />the ore reserves in the deposit<br />South Mining District Majdanpek.<br />Mini-block method is professionally<br />verified present in a detail in the relevant<br />technical literature, where it is isolated as a<br />separate method in a group of topological<br />methods for calculation the ore reserves.<br />In selecting the mini-block method, as<br />the base, it was in a mind that the copper<br />deposit South Mining District Majdanpek<br />was basically explored by rectangular grid<br />of exploration drill holes 100 × 50 m, and<br />the contours of mineralization were tested<br />in several horizons by mining prospecting<br />works. Also, the deposit has a form of<br />elongated lenses of uniform mineralization<br />thickness.<br />The adopted mini-blocks are a cube<br />with sides of 15 m due to the designed<br />height of exploitation benches, also 15 m,<br />and ore thickness in it.<br />Kriging method was used for evaluation<br />the calculation blocks.<br />In large deposits, as it is the case with<br />the copper deposit South Mining District<br />Majdanpek, the advantage of reserve calculation<br />using computer technology in<br />relation to the calculation of other (“manual”)<br />methods are the following:<br />� it is possible in a short period of<br />time to generate a large number of<br />variants, carry out their analysis<br />and find the best solution,<br />� thus obtained results have satisfactory<br />accuracy and they are accepted<br />as the representative in the expert<br />public,<br />� potential creditors and concessionaires<br />require to comply with described<br />methodology and that the<br />deposit is displayed in a digital<br />form.<br />3. TECHNO-ECONOMIC DATA FOR<br />EVALUATION THE<br />DEPOSIT VALUE<br />The adopted initial techno-economic<br />data needed to evaluate the deposit value,<br />are shown in Table 1. They were adopted<br />on the basis of many years production<br />experience in this mine, mine planning<br />documents, existing studies for exploitation<br />of this deposit and assess the trends in<br />market prices of metals in the world in<br />next period.<br />Total investments for open pit and flotation<br />are estimated to 50 000 000 $. Possible<br />production capacity was adopted<br />according to the Plan of development the<br />copper ore production in RTB and it is 8.5<br />million tons of ore annually.<br />The condition of open pit, geodetic recorded<br />on 05.02.2011, was taken for<br />analysis the possibility of mining.<br />The basic parameters of exploitation<br />were adopted on the basis of gained experience<br />in excavation the deposit, that is:<br />- bench height, 15 m,<br />- angle of bench slope, 70°,<br />- angle of final pit slope in the range<br />of 35 - 38°, and<br />- width of bench level in the range of<br />13.0 to 18.5 m.<br />Review of other techno-economic parameters<br />for deposit optimization is systematized<br />in Table 1.<br />No 4, 2011. 88<br />MINING ENGINEERING
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INSTITUT ZA RUDARSTVO I METALURGIJU
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SADR@AJ CONTENS M. Bugari
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vršeno je sve do 1987. god. a kona
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MINING AND METALLURGY INSTITUTE BOR
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Based on realized geological drilli
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istočno od đerdapske navlake lež
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GEOLOŠKE KARAKTERISTIKE LEŽI
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Sl. 4. Teren u domenu ležišta gli
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Ispitivanje granulometrijskog sasta
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literature data, semi-detailed polu
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GEOLOGICAL CHARACTERISTICS OF
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Fig. 4. Field in the domain of clay
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Testing of grain-size distribution
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Ova ankerna smeša će biti koriš
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This anchor mixture will be used in
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Tabela 6. Prosečne neto zarade<br
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Table 1. Ore reserves in the active
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Table 3. Production of accompanying
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The average net wages have a tenden
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i izražava mogućnost da element t
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i p ( RZ t ) RZ = ma
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8. Iskop jama za temeije samce 1 2
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Pokazani postupak zatim analogno If it is not possible t
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Rz3 = Rz2+ t3 [ ] Rz3 = 3
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The difference in computation betwe
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Tabela 4. Zastupljenost objekata na
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8. TROŠKOVI SAOBRAĆAJNIH NEZ
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11. KRITERIJUMI VREDNOVANJA I 
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Tabela 15. Vrednosti kriterijumskih
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Table 3. Slopes of level Varia
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7. EXPLOITATION COSTS Exploita
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• changes in natural look of terr
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Fig. 2. Distribution of responses f
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INSTITUT B O INSTITU
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JP PEU RESAVICA ЈП ПЕУ Р
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INSTRUCTIONS FOR THE AUTHORS M
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Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

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