Blast fragmentation classification using Number-Size (N-S) fractal model in Jalal-Abad iron mine

• Autorzy: Nikzad M. , Asadi A. , Ahangaran D. K. , Yasrebi A. B. , Wetherelt A. , Afzal P.

Identyfikatory

DOI

10.24425/123697

Warianty tytułu

PL

Klasyfikacja wymiarów fragmentów skał powstałych w trakcie prac strzałowych w kopalni rud żelaza Jalal-Abad w oparciu o model fraktalny N-S (Number-Size)

• Języki publikacji: EN

Abstrakty

EN

One of the main purpose of accurate blasting in open pit mining is to achieve optimum rock fragmentation. The degree of rock fragmentation plays a significant role in order to control and minimise the overall production cost including loading, hauling and crushing. In the present paper, the application of a Number-Size (N-S) fractal model is intended to classify the blast fragmentation size in the Jalal-Abad iron mine, SW Iran, using GoldSize image analysis software for four blasting with the obtained result being compared with Kuz-Ram curves. To do this, the fractal dimensions via N-S log-log plots were generated based on the output of the GoldSize software. The results indicated that the fragmented rocks have a multifractal nature with four/five different fragmented populations in terms of size namely; the fine rocks with the size of less than 16 cm, Mean-fragment values between 16 and 45 cm, In-range between 45 and 70 cm and finally, oversize larger than 70 cm.

PL

Jednym z głównych celów prowadzenia prac strzałowych w kopalniach odkrywkowych jest uzyskanie fragmentów skał o optymalnych rozmiarach. Stopień rozkruszania skał jest kluczowym czynnikiem decydującym o całkowitych kosztach produkcji, obejmujących także koszty załadunku, odstawy urobku i rozdrobnienia. W pracy tej omówiono zastosowanie modelu fraktalnego N-S (Number-Size) do klasyfikacji fragmentów skał uzyskanych w wyniku prowadzenia prac strzałowych w kopalni rud żelaza Jalal-Abad, w południowo-zachodnich rejonach Iranu. W analizach wykorzystano oprogramowanie do analizy obrazów GoldSize, wyniki uzyskane po czterech seriach prac strzałowych porównano następnie z wykresami Kuz-Ram. W tym celu na podstawie danych wyjściowych uzyskanych przy pomocy pakietu GoldSize wygenerowano wymiary fraktalne w oparciu o wykresy N-S w pełnej skali logarytmicznej. Otrzymane wyniki wskazują, że uzyskane fragmenty skalne miały charakter multi-fraktalny, obejmując cztery lub pięć populacji odłamków różniących się w kategorii rozmiarów: skały drobne o wymiarach poniżej 16 cm, odłamki o średniej wielkości: pomiędzy 16 a 45 cm, odłamki o rozmiarach w zakresie 45-70 cm i odłamki duże, o wymiarach powyżej 70 cm.

Słowa kluczowe

EN

blasting; fragmentation; Number-Size (N-S) fractal model; Jalal Abad iron mine

PL

prace strzałowe; rozdrobnienie skał; model fraktalny N-S (Number-Size); kopalnia rud żelaza Jalal Abad

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2018
• Tom: Vol. 63, no. 3
• Strony: 783--796
• Opis fizyczny: Bibliogr. 39 poz., rys., tab., wykr.

Twórcy

autor

Nikzad M.

• Young Researchers Club, South Tehran Branch, Islamic Azad University, Tehran, Iran

autor

Asadi A.

• Department of Mining Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

autor

Ahangaran D. K.

• Department of Mining Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

autor

Yasrebi A. B.

• Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

autor

Wetherelt A.

• Camborne School of Mines, University of Exeter, Penryn, UK

autor

Afzal P.

• Department of Mining Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)