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    Wyświetlanie 1-5 z 5
    Tytuł:
    Tests of steel arch and rock bolt support resistance to static and dynamic loading induced by suspended monorail transportation
    Autorzy:
    Pytlik, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/178684.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mine transport
    suspended monorail
    transport-induced static support loading
    transport-induced dynamic support loading
    steel arch support resistance
    rock bolt support resistance
    Opis:
    At present, the suspended monorail systems constitute a very common means of transportation in the Polish hard coal mines. The main advantages of the suspended monorail include the independence of the route from the working floor surface irregularities and the possibility to transport cargo of significant mass and size. The masses and dimensions of machines and devices transported via monorail have increased considerably in recent times. This particularly concerns the transport of longwall system elements. In Poland, the maximum speed of suspended monorail travel is 2 m/s. Due to the fact that preparations are currently underway to increase the maximum speed above 2 m/s, it is necessary to inspect what influence it will have on work safety and mining support stability. Current operational experience and tests have shown that dynamic loads induced by the suspended monorail transportation have a significant influence on the roadway support stability, working protection durability and on the monorail operators. This is particularly true during the emergency braking of a suspended monorail by means of a braking trolley, where the overloads reach 3g. Bench tests of the selected steel arch and rock bolt support elements utilised in the Polish hard coal mines were conducted in order to determine the resistance of steel arch and rock bolt supports to static and dynamic loads. The article presents the results of the tests conducted on a steel arch support in the form of the sliding joints of an ŁP/V29 yielding roadway support, which is commonly employed in the Polish hard coal mines. Tests of elements of the threaded bolts with trapezoidal threads over the entire rod length were conducted as well. The conducted strength tests of steel arch and rock bolt support elements under static and dynamic loading have shown that dynamic loading has decisive influence on the support’s retaining of its stability. Support element stability decreases along with the increase of the impact velocity. This concerns both the steel arch support and the rock bolt support.
    Źródło:
    Studia Geotechnica et Mechanica; 2019, 41, 2; 81-92
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods for computer aiding the configuration and assessment of auxiliary mine transportation means
    Autorzy:
    Tokarczyk, Jarosław
    Dudek, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/410003.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    computer aiding system
    suspended monorail transportation
    traction calculations
    underground mining
    Opis:
    Mine transportation of materials in underground mine workings is realized by mine underground railways as well as by suspended monorails or floor-mounted railway. Transportation is realized on tracks placed on the floor of working or on rails suspended to roadway support. Each transport operation must be preceded by a transport design project, made in accordance with obligatory legislation. A part of the project are traction calculations. Their implementation in a computer program allows for minimization of the possibility of errors during the configuration of suspended queues and conducting traction calculations, which consequently leads to improve the level of safety. The article discusses the modular Safe Trans Design system, supporting the design of auxiliary mine transportation. The system has been implemented in the mines of JSW S.A. The assumptions and structure of the system as well as algorithms of operation of the ‘configurator of transportation sets’ and ‘assessment and reporting module’ are presented. The method of creating an auxiliary mine transportation system project is presented. Safe Trans Design system is used in planning, organizational and training activities implemented as part of transport safety management in mining plants. Developed methods can be easily adapted to other legislations of hard coal producers’ countries, where suspended monorails are used in underground auxiliary mining transportation systems.
    Źródło:
    Management Systems in Production Engineering; 2020, 4 (28); 268-275
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the impact of forces and acceleration during the riding and braking of a suspended monorail
    Autorzy:
    Tokarczyk, Jarosław Andrzej
    Rotkegel, Marek
    Pytlik, Andrzej
    Niedworok, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/219866.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transport podziemny
    podwieszana kolejka szynowa
    badania
    underground transportation
    suspended monorail
    research
    load
    Opis:
    This article presents the results of experimental studies aimed at identifying the forces and acceleration during the riding and braking action of a suspended monorail. The tests were conducted under in situ conditions, in a dip-heading “B” ZG SILTECH in Zabrze. The paper also discusses a test stand, a metering system, and presents the impact of changes in speed on forces in slings of the suspended route. The measurements of selected parameters were performed for three variants: the route, the emergency haulage braking and the braking trolley set braking. The results include waveforms of forces in route slings, and acceleration values acting on the operator and transported load.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 2; 399-414
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation
    Autorzy:
    Drozd, Kazimierz
    Nieoczym, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2022491.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    suspended monorail
    dynamic force
    mining auxiliary transportation
    Opis:
    Despite the fact that suspended monorails have been used in the mining industry for over 50 years it is necessary to continue research on the possibilities of increasing the unit mass of the transported load or the speed of people transport. The first step is to establish the exact dynamic load of suspended route’ elements and compare this value with easy to calculation static load. The objective of the research was to determine the influence of speed and direction of travel on maximum load force applied to the sling of the route in mining excavation. The research results indicated that the speed of 2 ms−1 does not significantly influence the load on the sling. Theoretical hypothesis, stating that the estimation of the force value in the sling ought to be performed using projecting on a surface perpendicular to the route was confirmed. It was also proven that in order to characterize the geometry of the sling as well as a precise analysis of its load it is necessary to employ the length and the angle of the chain in relation to the above mentioned surface. Upon employing statistical analysis of the test results, the maximum dynamic effect of the locomotive passing was determined to be 20.1 ± 2.5% of the value of the calculated static load for all slings, projected onto a plane perpendicular to the route. For a single sling, mounted on a test route section inclined at an angle of about 10°, the increase in force due to the passage of the locomotive was up to 21.0% of the static load for this sling.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 1; 266-281
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Systems and tracks of self-powered suspended monorails for transportation of people in horizontal workings and workings with inclination up to 45°
    Układy i trasy transportu kolejkami podwieszonymi z napędem własnym do przewozu ludzi w wyrobiskach poziomych oraz pochyłych o nachyleniu do 45°
    Autorzy:
    Tokarczyk, J.
    Kania, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1361024.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    górnictwo podziemne
    kolejki podwieszone
    wirtualne prototypowanie
    underground mining
    suspended monorail
    virtual prototyping
    FEM
    Opis:
    The article presents the number of transport systems and the length of the routes on which people are transported in Polish mines. A legal status in Poland and China and the guidance of the Regional Office of Arnsberg in Germany were presented. The actual speed as a function of time recorded during exploitation of the suspended monorail in the mining conditions is shown. A technical potential maximum velocity of the suspended drivetrains is identified. Extended criterial model for assessment of effects of overloads to operators and transported team as well as algorithm for identification of effects of dynamic overloads are presented. Example of simulation result, i.e. behaviour of virtual model of Hybrid III dummy during its transportation in a cabin on a curve, is given.
    W artykule przedstawiono liczbę układów transportowych i długości tras, na których prowadzona jest jazda ludzi. Zaprezentowano stan prawny obowiązujący w Polsce i Chinach oraz wytyczne Okręgowego Urzędu Arnsberg w Niemczech. Zamieszczono rzeczywiste prędkości jazdy w funkcji czasu, zarejestrowane podczas eksploatacji kolejki podwieszonej w zakładzie górniczym. Określono techniczne możliwości prędkości maksymalnej dla wybranego ciągnika kolejki podwieszonej. Przedstawiono rozszerzony model kryterialny do oceny skutków przeciążeń oddziałujących na operatorów i przewożoną załogę oraz algorytm identyfikacji skutków przeciążeń dynamicznych. Zaprezentowano przykładowy wyniki symulacji – zachowanie się wirtualnego modelu manekina Hybrid III podczas jazdy kabiną osobową na zakręcie.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2016, 54, 3; 31-39
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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