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Wyszukujesz frazę "ANFO" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Influence of a Primer on the Velocity of Detonation of ANFO and Heavy ANFO Blends
    Autorzy:
    Žganec, S.
    Bohanek, V.
    Dobrilović, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/951497.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ANFO
    Heavy ANFO
    primer
    velocity of detonation
    Opis:
    ANFO is the most common explosive for civil use in the fields of mining and civil engineering. Some properties of ANFO, like poor water resistance, low density and low velocity of detonation can be improved by mixing ANFO with a certain percentage of an emulsion. These explosives are called Heavy ANFO blends. This paper presents a study of the influence of a primer on the velocity of detonation of ANFO and Heavy ANFO blends. Three types of primers were used for the initiation of the explosives and the velocity of detonation was measured in situ by a continuous method. Based on the results of these measurements, the relationship between the detonation velocity of the primer used and the detonation velocity of the primed explosive were established.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 3; 694-704
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of explosive charge temperature on the velocity of detonation of ANFO explosives
    Autorzy:
    Dobrilović, M.
    Bohanek, V.
    Žganec, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/358379.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ANFO
    temperature
    velocity of detonation
    Opis:
    ANFO is the most common explosive for civil use in the fields of mining and civil engineering. The effect of the explosive and the quantity of energy released by the detonation depends on the velocity of detonation. The influence on explosive performance of a large number of physical aspects of ANFO explosives and the conditions of initiation during blasting operations are mostly known, but the influence of the charge temperature on the velocity of detonation is not known. In order to quantify that influence, research on laboratory samples of smaller diameter and field samples of larger diameter, detonated in steel pipes, has been carried out. By processing and analysing the measured results the influence of charge temperature on the velocity of detonation of ANFO explosive has been determined.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 2; 191-197
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Initiation Energy on theVelocity of Detonation of ANFO Explosive
    Autorzy:
    Bohanek, V.
    Dobrilović, M.
    Škrlec, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/358833.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ANFO
    initiation energy
    velocity detonation
    Opis:
    ANFO explosives have been widely used for blasting operations in mining and civil engineering. From a scientific point of view, ANFO is interesting due to its non-ideal detonation. There are numerous factors that affect the velocity of detonation of ANFO explosives. This paper presents measured velocities of detonation of ANFO explosives initiated by various initiation methods and initiation energies. ANFO explosives were tested in steel pipes, and detonators and boosters of different masses and initiation energies were used for initiation. The initiation energy of a detonator was determined using the underwater initiation capability test. The influence of the equivalent shock energy and the equivalent bubble energy on the velocity of detonation of ANFO was also determined. These measured results contribute to a better understanding of the non-ideal detonation of ANFO explosives.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 4; 555-568
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary Detonation Study of Dry, Wet and Aluminised ANFO Using High-Speed Video
    Autorzy:
    Araos, Migue
    Onederra, Italo
    Powiązania:
    https://bibliotekanauki.pl/articles/358312.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ANFO
    detonation
    high-speed video
    aluminised ANFO
    nitrogen oxide fumes
    velocity of detonation
    non-ideal explosives
    Opis:
    ANFO is a well-known, reliable and safe commercial explosive. It has been around since the late 1950’s and its detonation properties are well characterized. In this study, the detonation process of dry, wet and aluminised ANFO, was recorded using two high-speed cameras with recording rates of 1,200 fps and 50,000 fps. The 1,200-fps footage allowed the observation of the post blast fumes (i.e. NOx) produced by ANFOs with different water contents. The 50,000-fps footage allowed the observation of the detonation area, gas expansion phase and the measurement of the velocity of detonation (VOD). The video footage also recorded a bright zone in front of the gases (longer than 50 mm). We assumed that a reaction is taking place in this zone, but it is difficult to be sure if this is the reaction zone or not as it is longer than previously reported reaction zone lengths. Analysis showed that ANFO detonates effectively for water contents of up to 9 wt.%, and more importantly, there is little variation in the VOD. As far as the expansion of gases is concerned, the ANFO-Al expansion rate appears to be different. In this mixture, the absence of NOx fumes could have been due to the expected higher temperatures produced by the burning of the aluminium additive as observed in the images recorded with the high-speed camera.
    Źródło:
    Central European Journal of Energetic Materials; 2019, 16, 2; 227-244
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling for Detonation and Energy Release from Peroxides and Non-Ideal Improvised Explosives
    Autorzy:
    Price, M. A.
    Ghee, A. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/358812.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    improvised explosive
    non-ideal
    reactive flow
    ANFO
    peroxide
    Opis:
    This work focuses on the development of models for predicting explosive power and air blast from the detonation of organic peroxides (TATP and HMTD) and non-ideal explosives involving ammonium nitrate, urea nitrate, and chlorates. CHEETAH calculations assuming ideal behaviour are in agreement with literature data for peroxides. However, the detonation behaviour of non-ideal explosives is dependent on charge size and confnement. This behaviour is investigated using thermo-chemical calculations with Kinetic CHEETAH, and reactive fow models with AUTODYN. A simplifed ignition and growth (I&G) model was calibrated using experimental charge diameter vs. VoD data. I&G models are used to predict the front curvature, reaction zone structure, and energy release from the non-ideal explosives. Detonation and air blast predictions for peroxides and unconfned and confned (paper, plastic, steel) non-ideal charges are presented.
    Źródło:
    Central European Journal of Energetic Materials; 2009, 6, 3-4; 239-254
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the JWL Constants for ANFO and Emulsion Explosives from Cylinder Test Data
    Autorzy:
    Sanchidrián, J. A.
    Castedo, R.
    López, L. M.
    Segarra, P.
    Santos, A. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358385.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    cylinder test
    JWL equation of state
    LS-DYNA
    ANFO
    emulsion explosives
    Opis:
    The Jones-Wilkins-Lee (JWL) equation of state parameters for ANFO and emulsion-type explosives have been obtained from cylinder test expansion measurements. The calculation method comprises a new radial expansion function, with a non-zero initial velocity at the onset of the expansion in order to comply with a positive Gurney energy at unit relative volume, as the isentropic expansion from the CJ state predicts. The equations reflecting the CJ state conditions and the measured expansion energy were solved for the JWL parameters by a non-linear least squares scheme. The JWL parameters of thirteen ANFO and emulsion type explosives have been determined in this way from their cylinder test expansion data. The results were evaluated through numerical modelling of the tests with the LS-DYNA hydrocode; the expansion histories from the modelling were compared with the measured ones, and excellent agreement was found.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 2; 177-194
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aluminum Powder Infuence on ANFO Detonation Parameters
    Autorzy:
    Maranda, A.
    Paszula, J.
    Zawadzka-Małota, I.
    Kuczyńska, B.
    Witkowski, W.
    Nikolczuk, K.
    Wilk, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/358453.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ANFO
    aluminum powder
    detonation parameters
    blast wave
    toxic products of explosion
    Opis:
    Nowadays, ammonium nitrate-fuel oil (ANFO) is the most often used explosive in mining industry. Its advantages are: simple production, low price and practically lack of sensitivity to mechanical impacts during mechanical loading to shot-holes. ANFO has also some disadvantages: lack of waterproofness and low detonation parameters which reduce their range of use to dry blasting holes in low compactness rock masses. This paper presents the results of measurements of detonation parameters for aluminized ANFO with different amount of metallic powder. The experiment included application of faked aluminum into granulated ammonium nitrate(V) (type "Extra" - YARA company) with an addition of oil FLEX 401. Positive effects of aluminum powder content on the decrease of concentration of toxic gases in detonation products, and on the blast wave performance and the work ability of ANFO/Al are also discussed.
    Źródło:
    Central European Journal of Energetic Materials; 2011, 8, 4; 279-292
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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