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Wyszukujesz frazę "emulsion explosives" wg kryterium: Temat


Wyświetlanie 1-12 z 12
Tytuł:
Optimization of the rock blastings in opencast mines using hydromite emulsion explosives
Autorzy:
Maranda, A.
Gołąbek, B.
Korytkowski, B.
Suszka, J.
Rink, P.
Powiązania:
https://bibliotekanauki.pl/articles/89128.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
emulsion explosives
detonation parameters
blast grid
Opis:
In the current paper, measurement results of the detonation parameters for model emulsion explosives are presented, one of the matrices constituting a base for Hydromite 100 and 70; the work additionally details the results of the rock blastings, carried out by means of the above mentioned materials. The blastings were executed in the following opencast mines: Kamienna Góra, Kopalnia Granodiorytu Łazany II, Łagów V and Warta Cement Plant. The goal of the proceedings was to optimize the blast grid for specific plants.
Źródło:
Mining Science; 2014, 21; 33-41
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the Influence of Sensitizer Content on the Density of a Bulk Emulsion Explosive Used in Underground Operations
Autorzy:
Kramarczyk, Bartłomiej
Mertuszka, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/27787941.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
blasting
emulsion explosives
density measurements
chemical sensitization
Opis:
Emulsion matrix sensitization is typically performed by chemical reduction of the density using different sensitization agents. Mixing of the components takes place directly inside the loading hose, which is equipped with static mixing devices. Precise dosing of the components, due to the multi-ingredient nature of the mixture, has a significant impact on the detonation and operational parameters of the end product. However, the operation and maintenance of the mixing-charging units in underground mines is very difficult due to the local conditions. As a consequence, different values for the detonation parameters may be expected when charging the same explosive into blastholes using two different charging units. The present article presents the results of laboratory testing of the influence of the sensitizing agent content on the density of a bulk emulsion explosive. Analysis confirmed that increasing the concentration of the sensitizing agent by 30% and 50% led to density reductions by 4% and 7%, respectively. In turn, reducing the sensitizer content by the same percentages resulted in an increase in the final density by 7% and 8%, respectively.
Źródło:
Central European Journal of Energetic Materials; 2021, 18, 4; 429--447
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of the VOD of Selected Mining Explosives and Novel “Green Explosives” Using the Continuous Method
Autorzy:
Nikolczuk, Karolina
Maranda, Andrzej
Mertuszka, Piotr
Fuławka, Krzysztof
Wilk, Zenon
Koślik, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/357982.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
detonation velocity
emulsion explosives
hydrogen peroxide
MicroTrap™ System
Opis:
Explosive velocity, also known as detonation velocity or velocity of detonation (VOD), is one of the most important and basic parameters describing the properties of explosives. This work presents the VOD results of three different explosives. Two of the explosives were ammonium nitrate-based (straight emulsion and Heavy ANFO). The third explosive was based on hydrogen peroxide (HP). The aim of the experiments was to compare the VOD of the HP-based against the VOD of the ammonium nitrate-based explosives. The final conclusions and results of this preliminary work and the analysis of available literature show that HP-based explosives, so called “green explosives”, have the potential to successfully replace ammonium nitrate-based explosives in some applications. The results of this work will be used to develop production technology for new HP-based explosives and to find their possible applications, considering their environmentally friendly character (this novel formulation of explosive eliminates post-blast nitrogen oxide fumes (NOx), as a direct product of the detonation process). During the burning reaction, nitrogen oxides (NO, NO2) are produced as a result of the use of bulk ammonium nitrate-based commercial explosives. Exposure to these toxic gases can have negative effects on the health and safety of personnel and the surrounding environment. The results obtained for the new emulsion explosives allow them to be used extensively in the industry as a competitive product on the market.
Źródło:
Central European Journal of Energetic Materials; 2019, 16, 3; 468-481
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Time on the Density and Detonation Velocity of Bulk Emulsion Explosives – a Case Study from Polish Copper Mines
Autorzy:
Mertuszka, Piotr
Fuławka, Krzysztof
Pytlik, Mateusz
Wincenciak, Jarosław
Wawryszewicz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/358802.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
blasting
emulsion explosives
VOD
density measurements
chemical gassing
Opis:
The basic method for emulsion matrix sensitisation is chemical reduction of the density by producing in situ gas bubbles. The mixing of the components takes place directly inside the loading hose, which is equipped with a mixing device. Due to the multi-component nature of the mixture, the precise dosing of individual components has a key influence on the detonation behaviour of the final product. Unfortunately, keeping the mixing and charging of UG mobile units in good working condition in underground mines is a considerable challenge. As a result, completely different detonation parameters may be observed when charging the same explosive into blast holes using two different units. The aim of the present study was to determine the behaviour of the mechanically loaded emulsion explosives used in Polish underground copper mines by tracking the changes in the density and detonation velocity over time. Samples of the explosives were collected from selected mobile units. In addition, the influence of the quantity of the sensitising agent on the changes in the emulsion density and VOD was studied.
Źródło:
Central European Journal of Energetic Materials; 2019, 16, 2; 245-258
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Influence of Cooling Salts upon the Explosive Performance of Emulsion Explosives
Autorzy:
Papliński, A.
Maranda, A.
Powiązania:
https://bibliotekanauki.pl/articles/358849.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
emulsion explosives
cooling salts
explosion temperature and energy
Opis:
Emulsion explosives modified by the addition of cooling salts have been investigated. Sodium chloride and ammonium chloride were added as cooling agents. The research was carried out to develop emulsion explosives that can be applied in the coal mining industry. The particular requirements for the considered explosives must ensure a low hazard degree when used in the presence of coal dust and/or methane. Experimental determination of the detonation velocity confirmed that the satisfactory performance of the investigated emulsion explosives, modified by the addition of these cooling salts, was preserved. In all of the investigated samples, the detonation velocity was about 4500 m/s, with salt contents of about 10-15%. In order to explore the thermodynamic characteristics of the investigated explosives, the chemical composition as well as the state parameters of the detonation and explosion products were evaluated. In these analyses, the cooling additives were allowed to become involved in chemical reactions during the attainment of thermodynamic equilibrium in the reacting mixture. The results obtained show reciprocal relations between the partial loss of explosive performance (diminution in explosion energy and lowering of the amount of products in the gaseous phase) and the desired reduction in temperature of the explosion products.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 3; 523-535
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Equation of State for the Detonation Products of Emulsion Explosives
Autorzy:
Trzciński, Waldemar A.
Szymańczyk, Leszek
Kramarczyk, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/358339.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
emulsion explosives
cylinder test
equation of state for detonation products
Opis:
In this workcylinder testswere performed for two emulsion explosives (Emulinit 8L and Emulinit GM1) used in the mining industry. Based on the results of the tests, the detonation pressure and energy of these explosives were estimated. The detonation characteristics obtained, the profile of the expanding copper tube and the results of the numerical simulation enabled the constants in the JWL(Jones-Wilkins-Lee) equation of state to be determine for the detonation products of these two explosives.
Źródło:
Central European Journal of Energetic Materials; 2019, 16, 1; 49-64
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:
Infuence of Iron Ion on Thermal Behavior of Ammonium Nitrate and Emulsion Explosives
Autorzy:
Xu, Z.
Liu, D.
Hu, Y.
Ye, Z.
Wei, Y.
Powiązania:
https://bibliotekanauki.pl/articles/357932.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
Accelerating Rate Calorimeter (ARC)
ammonium nitrate
critical temperature
emulsion explosives
thermal stability
Opis:
The infuence of ferric nitrate on the thermal stability of ammonium nitrate and emulsion matrix were used to study with Accelerating Rate Calorimeter (ARC) and constant temperature thermal decomposition experiment in this paper. It is shown that ferric nitrate has signifcant catalytic property to the ammonium nitrate and emulsion matrix, which decrease the initial decomposition temperature of ammonium nitrate by 60.16 C and emulsion matrix by 30.33 C. The results of the infuence of ferric nitrate on catalysis of ammonium nitrate using ARC and constant temperature thermal decomposition experiment are the same. The most probable mechanism function, activation energy and the preexponential factor of ammonium nitrate with ferric nitrate were determined to be f(α) = 1-α, E = 195.41 kJ/mol, A = 2.08×1019 s-1. The kinetics of ammonium nitrate decomposition can be used to calculate the critical temperatures for ammonium nitrate decomposition with and without the presence of ferric nitrate, based on the Frank-Kamenetskii model of thermal explosion. Furthermore, as the iron-plate experiment shows, ferric nitrate can signifcantly reduce the critical temperature of emulsion matrix decomposition. Once the ferric nitrate interfuses in the ammonium nitrate and emulsion matrix, the thermal stability of ammonium nitrate and emulsion matrix is decreasing.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 1; 77-93
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of aluminium additives on selected detonation parameters of a bulk emulsion explosive
Wpływ dodatku aluminium na wybrane parametry detonacyjne materiału wybuchowego emulsyjnego luzem
Autorzy:
Kramarczyk, Bartłomiej
Pytlik, Mateusz
Mertuszka, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1075878.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
emulsion explosives
aluminium granules
detonation parameters
materiały wybuchowe emulsyjne
aluminium granulowane
parametry detonacyjne
Opis:
W artykule dokonano oceny wpływu zawartości dodatku pyłu aluminiowego na wybrane parametry detonacyjne materiału wybuchowego emulsyjnego luzem uczulanego chemicznie. Analiza zawierała oznaczenie zdolności do wykonania pracy na wahadle balistycznym i w blokach ołowianych, pomiar ciśnienia fali podmuchu oraz pomiar prędkości detonacji. Do badań zastosowano pięć typów materiału wybuchowego emulsyjnego różniących się procentową zawartością aluminium, tj. 0, 1, 3, 5 i 7%.
Źródło:
Materiały Wysokoenergetyczne; 2020, 12, 2; 99-113
2083-0165
Pojawia się w:
Materiały Wysokoenergetyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of the blasthole diameter on the detonation velocity of bulk emulsion explosive in the conditions of selected mining panel of the Rudna mine
Wpływ średnicy otworu strzałowego na prędkość detonacji materiału wybuchowego emulsyjnego luzem w warunkach wybranego oddziału kopalni Rudna
Autorzy:
Mertuszka, Piotr
Szumny, Marcin
Fuławka, Krzysztof
Maślej, Jarosław
Saiang, David
Powiązania:
https://bibliotekanauki.pl/articles/220121.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
materiały wybuchowe
prędkość detonacji
analiza rozdrobnienia
emulsion explosives
detonation velocity
blasthole diameter
fragmentation analysis
Opis:
The blasting technique is currently the basic excavation method in Polish underground copper mines. Applied explosives are usually described by parameters determined on the basis of specific standards, in which the manner and conditions of the tests performance were defined. One of the factors that is commonly used to assess the thermodynamic parameters of the explosives is the velocity of detonation. The measurements of the detonation velocity are carried out according to European Standard EN 13631-14:2003 based on a point-to-point method, which determines the average velocity of detonation over a specified distance. The disadvantage of this method is the lack of information on the detonation process along the explosive sample. The other method which provides detailed data on the propagation of the detonation wave within an explosive charge is a continuous method. It allows to analyse the VOD traces over the entire length of the charge. The examination certificates of a given explosive usually presents the average detonation velocities, but not the characteristics of their variations depending on the density or blasthole diameter. Therefore, the average VOD value is not sufficient to assess the efficiency of explosives. Analysis of the abovementioned problem shows, that the local conditions in which explosives are used differ significantly from those in which standard tests are performed. Thus, the actual detonation velocity may be different from that specified by the manufacturer. This article presents the results of VOD measurements of a bulk emulsion explosive depending on the diameter of the blastholes carried out in a selected mining panel of the Rudna copper mine, Poland. The aim of the study was to determine the optimal diameter of the blastholes in terms of detonation velocity. The research consisted of diameters which are currently used in the considered mine.
Technika strzałowa jest obecnie podstawową metodą urabiania złóż w polskich kopalniach rud miedzi. Stosowane materiały wybuchowe charakteryzowane są najczęściej poprzez parametry wyznaczane na podstawie określonych norm, które szczegółowo opisują sposób i warunki prowadzenia badań. Jednym z parametrów, który jest powszechnie stosowany do oceny parametrów termodynamicznych materiałów wybuchowych jest prędkość detonacji. Pomiar prędkości detonacji jest wykonywany zgodnie z normą EN 13631-14:2003 i oparty jest na metodzie dwupunktowej, która określa średnią prędkość detonacji na zadanym odcinku. Wadą tej metody jest brak informacji o przebiegu procesu detonacji wzdłuż próbki materiału wybuchowego. Metodą pozwalającą uzyskać dane o propagacji fali detonacyjnej w ładunku jest metoda ciągła, która umożliwia analizę charakteru detonacji na całej długości ładunku materiału wybuchowego. W certyfikatach badań danego materiału wybuchowego podawane są najczęściej średnie wartości prędkości detonacji, jednak bez określenia charakterystyki ich zmian w zależności od gęstości czy średnicy otworu strzałowego. Dlatego też wartość ta jest niewystarczająca do oceny efektywności danego materiału wybuchowego. Analiza powyższego problemu pokazuje, że warunki lokalne, w jakich stosuje się materiały wybuchowe, znacząco odbiegają od warunków, w których prowadzi się badania normowe. Tym samym, rzeczywista prędkość detonacji może różnić się istotnie od wartości podawanej przez producenta. W niniejszym artykule przedstawiono wyniki badań prędkości detonacji materiału wybuchowego emulsyjnego luzem w zależności od średnicy otworów strzałowych, przeprowadzonych w wybranym polu eksploatacyjnym kopalni Rudna. Celem pracy było określenie optymalnej, z punktu widzenia prędkości detonacji, średnicy stosowanych otworów strzałowych. Badaniom poddano średnice, które są obecnie stosowane w analizowanej kopalni.
Źródło:
Archives of Mining Sciences; 2019, 64, 4; 725-737
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology for increasing the level of environmental safety of iron ore mines with use of emulsion explosives
Autorzy:
Khomenko, Oleh
Kononenko, Maksym
Myronova, Inna
Kovalenko, Ihor
Cabana, Edgar Caceres
Dychkovskyi, Roman
Powiązania:
https://bibliotekanauki.pl/articles/27324386.pdf
Data publikacji:
2023
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
source of emission
concentration
environmentally hazardous substances
physicochemical analysis
emulsion explosives
environmental hazard index
emisja
koncentracja
zagrożenia środowiskowe
Opis:
Laboratory and industrial studies have established the total impact of environmentally hazardous substances, taking into account the distance from the source of emissions and the specific consumption of explosives. With the help of physicochemical analysis and biological testing, the dependence of the change in the conditional indicator of damage to bioindicators with an increase in the distance from the source of emission and the specific annual consumption of explosives was revealed. A methodology for calculating the environmental assessment of the state of atmospheric air around the mine ventilation shaft has been developed. The exponential dependence of the influence of surface concentrations of environmentally hazardous substances on the damage of bioindicators at the cellular and organismic levels has been established, which makes it possible to assess the state of atmospheric air at industrial sites of iron ore mines. The proposed technology of sand drilling, which involves the use of emulsion explosives in mining ore deposits in chamber development systems will reduce emissions of environmentally hazardous substances into the atmosphere and increase the level of environmental safety of iron ore mines.
Źródło:
Mining Machines; 2023, 41, 1; 48--57
2719-3306
Pojawia się w:
Mining Machines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fortifcation of W/O Emulsions by Demilitarized Explosives. Part I. Use of TNT
Autorzy:
Němec, O.
Jungová, M.
Mareček, R.
Novotný, M.
Zeman, S.
Šelešovský, J.
Powiązania:
https://bibliotekanauki.pl/articles/358504.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
demilitarized explosives
detonation
emulsion
TNT
Opis:
This paper presents a study of the relationship between detonation velocities, D, and relative explosive strength (RS) of fortifed W/O emulsion explosives, on the one hand, and the grain size and quality of the demilitarized TNT used for this fortifcation, on the other. It has been found that demilitarized TNT having a grain size below 400 μm could give acceptable results both in terms of initiation and detonation velocity and the RS values. Demilitarized TNT, however, is not a reliable sensitizer even in a micronized state, and therefore using TNT necessitates simultaneous sensitizing of the fnal W/O explosive with microballoons and it has no signifcantly better infuence on the performance of the resulting explosives. The small-scale cook-off test of such a W/O mixture fortifed by 50% by wt. of TNT has shown that such a mixture is a relatively safe explosive.
Źródło:
Central European Journal of Energetic Materials; 2011, 8, 3; 193-207
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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