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Wyszukujesz frazę "rocks cutting" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Evaluation of the Quality of Conical Picks and the Possibility of Predicting the Costs of Their Use
Autorzy:
Krauze, Krzysztof
Mucha, Kamil
Wydro, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2064880.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
underground mining
rocks cutting
conical picks
costs
Opis:
Currently, the user’s choice of a conical pick involves specifying its geometric and material parameters, taking into account the place and conditions of its work. The selection is then made, usually on the basis of solely one criterion, which is the price. Thus, at the stage of both purchase and operation, the quality of picks and their suitability for a specific machine and the processed mineral are not assessed. Therefore, a method was developed to enable conducting tests that determine the geometric parameters of a pick, the types of materials of the pick body and WC insert as well as the pick wear rate (intensity) in a laboratory workstation. The wear rate (intensity) is described by the C2 index – the smaller is its value, the slower is the pick’s wear. The C2 index has been used to forecast the wear of picks and to determine their unit price and operating costs. This allows for precise determination of investment requirements and a proper selection of the pick.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 491--504
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machines for Mechanical Mining of Hardly Workable and Abrasive Rocks
Autorzy:
Bołoz, Łukasz
Kalukiewicz, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/2064895.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
hardly workable rocks
mechanical mining of rocks
cutting with disc-shaped tools (disc mining)
undercutting
mining machines
Opis:
Mechanical mining is a widely used method for separating material from mined rock in the mining branch, tunnelling, road and construction industries. Depending on the mechanical properties of rocks, most often defined by uniaxial compressive strength, various machines and tools are applied. Apart from rock strength, the efficiency of the mining process is determined by abrasiveness, which affects the rate of tool abrasive wear. Currently, disc mining by static pressure or rear undercutting are the most developed methods. Undercutting can be supported by high pressure water jet or disk oscillation. Mining with drills also utilizes static pressure. In addition to discs, conical picks are applied; they are mounted on cutterheads. In underground mining and tunnelling, there is an increasing need to cut abrasive rocks with a strength of more than 120 MPa in places where explosive materials cannot be used. In the article, the recently applied and developed methods of cutting abrasive rocks characterized by high strength, such as copper, gold, tungsten or platinum ores and diamond deposits, have been presented. Next, the latest machines and machine systems used for their mining are reviewed. Leaders in the mining machinery industry, such as Joy (Komatsu), Epiroc (Atlas Copco), Sandvik and Aker Wirth are developing proprietary designs of cutting machines based on both well-known and completely new ideas.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 150--160
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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