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Готові списки джерел за темами / Explosive mixture / Статті в журналах

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Статті в журналах з теми "Explosive mixture"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Ivanova, O. V., S. A. Zelepugin, A. S. Yunoshev, and V. V. Sil’vestrov. "Experimental and Numerical Research in Explosive Loading of Two- and Three-Component Solid Mixtures." Eurasian Chemico-Technological Journal 16, no. 1 (2013): 3. http://dx.doi.org/10.18321/ectj162.

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Анотація:

We have conducted experimental and numerical research in two- and three-component solid mixtures placed into a cylindrical recovery ampoule under explosive loading. Behavior of the mixture is described by a mathematical model of a multicomponent medium. In the model, every component of a mixture simultaneously occupies the same volume as the mixture. Components interact with each other, exchanging momentum, energy, and mass (if the chemical reaction between the components occurs). An equality of components’ pressure is chosen as a condition for joint deformation of components. Finite element m

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2

Remez, N., A. Dychko, Y. Besarabets, S. Kraychuk, N. Ostapchuk, and L. Yevtieieva. "Impact Modelling of Explosion of Mixture Explosive Charges on the Environment." Latvian Journal of Physics and Technical Sciences 56, no. 3 (2019): 37–49. http://dx.doi.org/10.2478/lpts-2019-0018.

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Abstract The present paper provides the modelling of the explosion of the charges of the traditional (trotyl) and new blended explosive substances: polymix GR1/8 (74 %) + KRUK2 (26 %), compolite GS6, polymix GR4-T10. As a result of the research, it has been established that when using TNT a specific impulse is formed, which is by 40 % more than an explosion of new mixed explosives, and the safe distance from the source of the explosion of such explosives is increased by 25 %–50 %. On the basis of the established dependences of excess pressure, the specific impulse on the type and mass of charg

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3

Pei, Qing, Meng Li, and Heng Li. "Study on Thermal Decomposition and Thermal Safety of Mixtures of Highly Active Aluminum Powder and Nitramine Explosive." Journal of Physics: Conference Series 2478, no. 12 (2023): 122033. http://dx.doi.org/10.1088/1742-6596/2478/12/122033.

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Abstract The newly prepared and stored highly active aluminum powder were mixed with common nitramine explosives HMX and CL-20 at a mass ratio of 1:1, respectively. The effects of the two kinds of high active aluminum powder on the thermal decomposition properties of HMX and CL-20 were investigated by differential scanning calorimetry (DSC). The thermal explosion critical temperature of the mixture of high active aluminum powder and nitramine explosive was calculated. The result shows that after joining highly active aluminium powder, highly active aluminium/nitramine explosive mixture, modera

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4

Xie, Xing Hua, Xiao Jie Li, Shi Long Yan, et al. "Low Temperature Explosion for Nanometer Active Materials." Key Engineering Materials 324-325 (November 2006): 193–96. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.193.

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This paper describes a new method for prediction of the Chapman–Jouguet detonation parameters of CaHbNcOdLieMnf explosives for mixture of some of low temperature explosion explosives at 0 = 1000 kg/m3. Explosion temperatures of water-gel explosives and explosive formulations are predicted using thermochemistry information. The methodology assumes that the heat of detonation of an explosive compound of products composition H2O–CO2–CO–Li2O–MnO2–Mn2O3 can be approximated as the difference between the heats of formation of the detonation products and that of the explosive, divided by the formula w

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5

Komarov, Aleksandr, Nikolai Gromov, and Anton Korolchenko. "Influence of hydrodynamic processes on apparent flame velocity in accidental explosions." E3S Web of Conferences 457 (2023): 02039. http://dx.doi.org/10.1051/e3sconf/202345702039.

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Анотація:

The main impact factor of an accidental explosion is explosive pressure, the numerical value of which is determined by the magnitude of the apparent flame velocity during explosive combustion of an explosive mixture. Therefore, the issues related to predicting the apparent flame velocity in deflagration explosions are the main ones when considering the problem of ensuring explosion resistance of buildings and structures and investigating accidents accompanied by explosions. Relationships are presented that confirm the unambiguous dependence of explosive pressure on apparent flame velocity. It

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6

Tugyi, Levente, Zoltán Siménfalvi, and L. Gábor Szepesi. "Investigation of the explosive atmospheres extent of hydrogen and methane gas mixtures by calculation and FLACS-CFD simulation." Multidiszciplináris Tudományok 14, no. 3 (2024): 44–60. https://doi.org/10.35925/j.multi.2024.3.5.

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Explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric conditions, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture. Methane-hydrogen mixtures will become more and more important for energy use in the near future. It has many positive economic and environmental benefits, while the risk of explosion is partly forgotten. It is necessary to identify hazardous areas in the interpretation of technological equipment. The applicable standard, EN IEC 60079-10-1:2020, defines th

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7

Truong, Quang Vinh, and Trung Hoc Ngo. "Calculating limiting oxygen concentration of gas mixtures." International Science Journal of Engineering & Agriculture 2, no. 2 (2023): 142–46. http://dx.doi.org/10.46299/j.isjea.20230202.13.

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The limit values for the fuel concentration in the air-flammable fuel mixture are LEL (lower explosive limit) and UEL (upper explosive limit). The addition of an inert component to the fuel / air mixture determines the increase and decrease of the LEL, until no explosion occurs. The maximum oxygen quantity of the non-combustible - air - inert fuel mixture is LOC (limited oxygen concentration), an important safety property. Investigation of a comprehensive set of data on the flammability at high temperature and ambient pressure obtained from documented sources was carried out for systems contai

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8

Ivanova, Oxana V., and Sergey A. Zelepugin. "Explosive Compaction of Solid Inert Three-Component Mixtures Taking into Account a Different Thickness of the Explosive Axial Layer." Applied Mechanics and Materials 770 (June 2015): 174–78. http://dx.doi.org/10.4028/www.scientific.net/amm.770.174.

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We consider the axisymmetric problem of explosive compaction of a mixture from aluminum, sulfur and carbon placed into a cylindrical steel ampoule. The inert substance (graphite) is added to the mixture to avoid the reaction between aluminum and sulfur. We found the essential influence of the thickness of the explosive layer on the final result of explosive compaction. Insufficient thickness of explosives, as well as the excessive thickness may be a reason for an incompletely compacted final product or lead to the formation of cracks or damage.

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9

Willits, A. B. "EXPLOSIVE-MIXTURE MOTORS." Journal of the American Society for Naval Engineers 18, no. 4 (2009): 1035–62. http://dx.doi.org/10.1111/j.1559-3584.1906.tb00002.x.

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10

Demattè, R., L. Michael, and N. Nikiforakis. "Reacting condensed phase explosives in direct contact." Journal of Applied Physics 131, no. 9 (2022): 095901. http://dx.doi.org/10.1063/5.0075851.

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Анотація:

In this article, we present a new formulation and an associated algorithm for the simultaneous numerical simulation of multiple condensed phase explosives in direct contact with each other, which may also be confined by (or interacting with one or more) compliant inert materials. Examples include composite rate-stick (i.e., involving two explosives in contact) problems, interaction of shock waves with chemically active particles in condensed-phase explosives, and devices such as detonators and boosters. There are several formulations that address the compliant or structural response of confine

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11

WANG, CHENG, TING YE, and JIANGUO NING. "NUMERICAL SIMULATION OF THE DETONATION OF CONDENSED EXPLOSIVES." Modern Physics Letters B 23, no. 03 (2009): 285–88. http://dx.doi.org/10.1142/s0217984909018217.

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Detonation process of a condensed explosive was simulated using a finite difference method. Euler equations were applied to describe the detonation flow field, an ignition and growth model for the chemical reaction and Jones-Wilkins-Lee (JWL) equations of state for the state of explosives and detonation products. Based on the simple mixture rule that assumes the reacting explosives to be a mixture of the reactant and product components, 1D and 2D codes were developed to simulate the detonation process of high explosive PBX9404. The numerical results are in good agreement with the experimental

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12

Popa, Cătălin Mihai, Silviu Marin Nan, Mihaela Părăian, Adrian Jurca, and Florin Păun. "Aspects of laboratory tests for the determination of the minimum ignition energy of the fuel / dust mixture." MATEC Web of Conferences 342 (2021): 04004. http://dx.doi.org/10.1051/matecconf/202134204004.

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During the technological processes of processing, production, handling and storage of combustible dusts, complex explosive mixtures may occur, the characteristics of which, in most cases, cannot be assimilated with the existing data in the specialized literature. If these combustible dusts are mixed with air in appropriate proportions and are initiated by an efficient source of ignition, they can burn rapidly and with considerable explosive force. One of the most common sources of ignition of potentially explosive atmospheres generated by the dust / air mixture is static electricity, materiali

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13

Liu, Li, Xinyi Mao, Yongheng Jing, Yao Tang, and Le Sun. "Study on the Explosion Mechanism of Low-Concentration Gas and Coal Dust." Fire 7, no. 12 (2024): 475. https://doi.org/10.3390/fire7120475.

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In coal mines, the mixture of coal dust and gas is more ignitable than gas alone, posing a high explosion risk to workers. Using the explosion tube, this study examines the explosion propagation characteristics and flame temperature of low-concentration gas and coal dust mixtures with various particle sizes. The CPD model and Chemkin-Pro 19.2 simulate the reaction kinetics of these explosions. Findings show that when the gas concentration is below its explosive limit, coal dust addition lowers the gas’s explosive threshold, potentially causing an explosion. Coal particle size significantly aff

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14

Pham Kim Dao, Pham Van Toai, Pham Quang Hieu, Bui Anh Thuc, and Tran Van Phuong. "Research on fabrication technology of PVV-5AVN explosive for explosive reactive armor." Journal of Military Science and Technology, IPE (October 14, 2024): 138–44. http://dx.doi.org/10.54939/1859-1043.j.mst.ipe.2024.138-144.

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Анотація:

PVV-5AVN explosive is a type of polymer-bonded explosive (PBX that typically comprises a mixture of RDX (hexogen), a high-explosive compound, and a polymer binder such as polyisobutylene. It finds extensive application in various generations of explosive reactive armor. This study investigates factors influencing the quality and specifications of PVV-5AVN explosives, including solvent choice, solvent ratio, mixing time, and ingredient proportions. Specifically, the RDX content is 85 ÷ 91%, and the binder system content is 9 ÷ 15% (with a DOS/PIB mass ratio of 2.75). These findings establish a

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15

Kozyrev, S. A., E. A. Vlasova, A. V. Sokolov, and E. A. Usachev. "Assessment of the efficiency of the explosion of the simple explosive mixtures with energy additives." Herald of Kola Science Centre of the RAS 12, no. 4/2020 (2020): 43–49. http://dx.doi.org/10.37614/2307-5228.2020.12.4.005.

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On the basis of experimental studies in the field and on polygon, the features of the detonation of mixed explosive charges on various types of ammonium nitrate with energy additives during pneumatic load-ing are revealed. It has been established that when using porous grades of nitrate, the addition of alu-minum powders differently dispersed leads to a decrease in detonation parameters due to the peculiari-ties of aluminum oxidation at the front of the detonation wave and does not provide the theoretically expected increase in the energy of the explosion. The use of high-quality fine-grained

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16

Komarov, A. A., and E. V. Bazhina. "Methods for Calculating the Drift of Heavy Clouds Considering Medium Motion." Occupational Safety in Industry, no. 7 (July 2022): 7–14. http://dx.doi.org/10.24000/0409-2961-2022-7-7-14.

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Peculiarities are considered related to the numerical integration of the diffusion equations for describing the formation and motion (drift) of explosive clouds formed on the territories of industrial facilities as a result of the accidental releases of combustible substances. The relevance of the study is associated with the fact that when the contents of an emergency release are mixed with an air, an explosive and flammable mixture is formed. The process of its combustion is determined by the volumetric concentration of the combustible substance. At concentrations below the lower concentrati

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17

KOMAROV, A. A., and E. V. BAZHINA. "The impact of gas-dynamic flows accompanying emergency explosions on buildings and structures." Prirodoobustrojstvo, no. 1 (2022): 84–92. http://dx.doi.org/10.26897/1997-6011-2022-1-84-92.

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In the article, using the example of a real explosive object, the methodology for determining the maximum dynamic load that forms during an emergency explosion is considered. The article shows that when determining the load from an emergency explosion, it should be considered that a deflagration explosion of a gas-air mixture occurs. It should be accepted that only a certain part of the combustible substance is involved in the explosion, which is determined as a result of solving the diffusion problem. Detonation explosion should be excluded from sources of explosive danger. A detonation explo

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18

Gabor, Dan, Emilian Ghicioi, Mihaela Părăian, Niculina Vătavu, Florin Adrian Păun, and Mihai Popa. "Sensitivity to ignition by electrostatic discharge of explosive dust / air." MATEC Web of Conferences 290 (2019): 12011. http://dx.doi.org/10.1051/matecconf/201929012011.

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Анотація:

In industrial sectors that use, process, transport or store, substances such as combustible dusts could exist some workplaces with explosion hazard due to the possibility of dust/air explosive formation and ignition, both inside the installations and in the surrounding atmosphere. Methods and means of protection aim to prevent the development of explosive atmospheres, followed by preventing the occurrence of ignition sources and then limiting the effects of explosions. To assess the risk of ignition of the explosive atmosphere, there must be known first of all, the explosive atmosphere’s sensi

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19

Krokhalev, A. V., V. O. Kharlamov, D. R. Chernikov, E. A. Kosova, S. V. Kuzmin, and V. I. Lysak. "RESEARCH OF THE MECHANISM OF COMPACTION OF MIXTURES OF POWDERS OF REFRACTORY CARBIDES WITH A METALLIC BOND IN EXPLOSIVE PRESSING ON A METAL SUBSTRATE." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 4(251) (April 23, 2021): 42–47. http://dx.doi.org/10.35211/1990-5297-2021-4-251-42-47.

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Анотація:

The results of investigations of the features of the behavior of the components of mixtures of refractory carbide powders with metals during explosive pressing are presented. It is shown that the main factor determining the compaction of mixtures is the dynamic flow of one of the phase components of the mixture into the initial pores of the powder. As the phase component of the mixture, the movement of which limits the degree of compaction and leads to the formation of a continuous matrix in the structure of the material pressed by the explosion, both the metal binder and the carbide component

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20

Gamera, Yu V., S. V. Ganaga, and Yu Yu Petrova. "On the matter of explosion safety of multicomponent mixture transportation facilities." Dependability 24, no. 4 (2024): 65–69. https://doi.org/10.21683/1729-2646-2024-24-4-65-69.

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Анотація:

Given the rapid development of the oil and gas industry, the matter of assessment of the explosion resistance of buildings and structures at multicomponent gas mixture transportation and processing facilities remains of relevance. The paper investigates the sensitivity to the initiation of explosive transformation of methane and air mixtures of hydrogen and methane homologues depending on the component composition. Estimates were obtained of the sizes of detonation cells of methane and hydrogen mixtures, which allows for a more accurate definition of the class of sensitivity to detonation.

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21

Amir, Zh A., D. A. Bayseytov, S. E. Gizatova, Zh B. Kudyarova, and M. I. Tulepov. "Tests of Samples of Emulsion Explosive Senatel Magnum before and after Introduction of the Marking Composition for Explosive Properties and Safety Criteria." Occupational Safety in Industry, no. 6 (June 2021): 75–81. http://dx.doi.org/10.24000/0409-2961-2021-6-75-81.

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The article is devoted to testing samples of the emulsion explosive Senatel Magnum before and after the introduction of the marking composition for explosive properties and safety criteria. It was established that the mixture of marking substances, which was introduced into the composition of the emulsion explosive Senatel Magnum, does not affect its explosive properties, as well as its safety in use during operation and conduct of blasting operations, since no inconsistencies were detected during tests by the specialists of explosive materials testing laboratory of the Expert Certification Ce

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22

Andreevskikh, Leonid A., Yu P. Dendenkov, Oleg B. Drennov, Anatoly L. Mikhailov, Nadezhda N. Titova, and Andrey A. Deribas. "Explosive Mixture for Explosive Welding of Thin Foils." Propellants, Explosives, Pyrotechnics 36, no. 1 (2010): 48–50. http://dx.doi.org/10.1002/prep.201000035.

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23

CHIKHRADZE, NIKOLOZ M., CONSTANTIN POLITIS, MIKHEIL CHIKHRADZE, and GEORGE ONIASHVILI. "BULK NANOSTRUCTURED MATERIALS OBTAINED BY SHOCK WAVES COMPACTION OF ULTRAFINE TITANIUM AND ALUMINUM." International Journal of Modern Physics: Conference Series 05 (January 2012): 391–99. http://dx.doi.org/10.1142/s2010194512002279.

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Theoretical and experimental Investigations of shock wave consolidation processes of Ti - Al nano sized and ultra-disperse powder compositions are discussed. For theoretical calculations of the shock wave loaded materials were used the hydrodynamic theory and experimental adiabatic of Ti and Al . The normal and tangential stresses in the cylindrical steel tube (containers of Ti - Al reaction mixtures) were estimated using the partial solutions of elasticity theory. The mixtures of ultra-disperse Ti and nano sized (≤ 50nm) Al powder compositions were consolidated to full or near-full density by

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24

Azarov, S., V. Sydorenko, V. Ievlanov, and M. Havryliuk. "Analysis of Conditions and Mechanisms for Generation of Explosive Mixtures at an Early Stage of Chornobyl Accident." Nuclear and Radiation Safety, no. 4(72) (November 14, 2016): 39–44. http://dx.doi.org/10.32918/nrs.2016.4(72).06.

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The paper presents the scenario developed for an early stage of the accident progression to assess impact of highly explosive hydrogen on RBMK-1000 design. It was found out that the ratio between the speed of local generation of gaseous hydrogen and the speed of hydrogen spreading in the vapor-gas medium of the core is the determining factor for the occurrence of conditions of explosive vapor-air mixture in the core. Obtained data can be used in further studies to model the formation of explosive mixtures in the environment, the amount of air and water vapor in the analysis of explosive

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25

Wolny, Paweł, Norbert Tuśnio, Artur Lewandowski, Filip Mikołajczyk, and Sławomir Kuberski. "Self-Acting Formation of an ANFO Similar Type of Explosive under Fire Conditions: A Case Study." Energies 14, no. 21 (2021): 6980. http://dx.doi.org/10.3390/en14216980.

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On 2 October 2003 in Saint-Romain-en-Jarez (France) a fire in a farm building triggered an explosion in which 26 people were injured. Police investigation, based solely on an analysis of the effects and on general engineering knowledge, showed that the explosion was caused by an uncontrollably generated mixture of ammonium nitrate (AN) and molten plastic crates which formed an explosive mixture similar to ammonium nitrate fuel oil (ANFO). This is the only commonly known example of an ammonium nitrate blast taking place at its end user destination. Is such an explanation of the incident plausib

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26

Jiang, Xinsheng, Dongliang Zhou, Peili Zhang, et al. "Explosive Characteristics Analysis of Gasoline–Air Mixtures within Horizontal Oil Tanks." Fire 7, no. 1 (2024): 24. http://dx.doi.org/10.3390/fire7010024.

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Horizontal oil tanks, like other oil storage containers, carry the risk of explosion when gasoline–air mixtures are ignited. With the widespread application of horizontal oil tanks in the petrochemical industry, attention to safety risks is increasing. However, currently, a limited amount of experimental research on such tanks exists. To explore the characteristics of gasoline–air mixtures combustion within the confined space of horizontal oil tanks, this study constructed a medium-scale simulated horizontal oil tank (L/D = 3, V = 1.0 m3) platform. By investigating the effects of different ini

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27

Dmitriev, N. V., N. I. Akinin, and N. O. Melnikov. "Study of Impact Sensitivity of the Octogen Mixtures with Metal Oxides." Occupational Safety in Industry, no. 3 (March 2022): 73–77. http://dx.doi.org/10.24000/0409-2961-2022-3-73-77.

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The experimental data is presented in the article concerning the impact sensitivity of mixtures of ocfol-3,5 (octogen) with various metal oxides (Fe2O3, V2O5, TiO2, particle size is 1–2 µm). The experiment was carried out by the method of critical pressures using a tensometric technique. As a result obtained are the dependences of the critical pressure of octogen mixtures initiation with metal oxides on the mass content of the latter. For the mixture of octogen + Fe2O3, significant sensitization of the base explosive was noted at an additive concentration of 30 %. With an increase of the iron

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28

Du, Yang, Jian Feng Gao, and Xin Sheng Jiang. "Studies of Fuel-Air Mixture Explosion Characteristics and Structure Fracture and Damage in Large-Scale Metal Oil Storage Tank." Key Engineering Materials 324-325 (November 2006): 1031–34. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.1031.

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Анотація:

The fuel-air mixture explosion incidents in the large-scale metal oil storage tank are frequent occurrence and rapidly extend because of the tank structure being fractured and damaged by the fuel-air mixture explosion. In this paper, the simulation experiment and numerical simulation has been carried out for the fuel-air mixture explosion in the large-scale metal storage tank. The shock waves characteristic of the explosive pressure has been studied and discussed. The fracture and damage effects caused by the shock waves characteristic to the tank structure has been analyzed and discussed too.

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29

Sakhno, Ivan, Svitlana Sakhno, Natalia Zuievska, Olha Bohomaz, and Arsen Poghosyan. "THE STUDY OF THE INFLUENCE OF TEMPERATURE ON THE EFFICIENCY OF NON-EXPLOSIVE DESTRUCTION OF ROCKS: CASE STUDY AT GRANITE QUARRY." SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”, no. 1(31)-2(32) (2024): 7–16. https://doi.org/10.31474/2073-9575-2024-1(31)-2(32)-7-16.

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Анотація:

Purpose. Determination of the operating temperature regime of a non-explosive destructive mixture based on calcium oxide in different temperature fields from the range of the spring-summer period, typical for Ukraine. Methodology. The work used following methods: laboratory modeling, field tests, engineering analysis, synthesis, statistical processing. Findings. The developed mining industry is an attractive industry for the implementation of SCDA in Ukraine. The main reasons for restraining the widespread implementation of SCDA are their high sensitivity to ambient temperature and a long dest

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30

Bolodyan, I. A., and L. P. Vogman. "Experimental Studies of the Formation and Combustion of Hydrogen-Air Mixtures during Liquid Hydrogen Spills and When Exposed to Water Screens in a Partially Confined Space." Occupational Safety in Industry, no. 10 (October 2024): 21–26. http://dx.doi.org/10.24000/0409-2961-2024-10-21-26.

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Анотація:

Experimental studies of processes of liquid hydrogen spill and evaporation and the generation of explosive and fire-hazardous hydrogen-air mixtures in a partially confined space with varying degrees of confinement (varying degrees of leakage of openings) on a stand of 96 m3 volume have been conducted, which involved the ignition of mixtures with delayed and non-delayed inflammation and the measurement of overpressure of explosion; the impact of water screen on these processes have been studied as well. The experiments with duty torches feature rapid combustion of the mixture when the boundary

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31

Moldovan, Lucian, Mihai Magyari, Marius Darie, and Clementina Sabina Moldovan. "Aspects regarding the influence of internal explosions over the maximum surface temperature for equipment with type of protection flameproof enclosure." MATEC Web of Conferences 389 (2024): 00015. http://dx.doi.org/10.1051/matecconf/202438900015.

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Анотація:

The type of protection flameproof enclosure “d” consists in placing the parts that could ignite an explosive atmosphere inside of an enclosure that can withstand the pressure developed during an internal explosion of an explosive mixture and which prevents the explosion transmission to the explosive atmosphere surrounding the enclosure. The protection to explosion must remain valid even in case of an internal explosion. The maximum surface temperature of electrical equipment is defined as the highest temperature which is attained in service under the most adverse conditions (but within the spe

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32

Polyakovskyi, V. A. "Gas mixture explosion as a tool for generating impulsive disturbances." Geofizicheskiy Zhurnal 43, no. 4 (2021): 166–75. http://dx.doi.org/10.24028/gzh.v43i4.239968.

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The work is devoted to the development of a device for generating impulsive perturbations in soil massifs. It is proposed to use the explosion energy of a high-pressure acetylene-oxygen gas mixture as a source of impulse perturbations. Applying the standard method of measuring mechanical stresses and using piezoelectric sensors, it is obtained the stress fields occurring in the soils when an explosion of the gas mixture takes place. It is revealed that the dependences of the maximal stresses in the soil massif on the relative distance to the source, when the gas charge under high pressure acts

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33

Sherzod, Zairov, Khudaiberdiev Oibek, Normatova Muborak Zh., and Nomdorov Rustam. "Developing the methods of controlling dust and gas conditions when blasting high benches in deep pits." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, no. 4 (June 25, 2020): 113–21. http://dx.doi.org/10.21440/0536-1028-2020-4-113-121.

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Анотація:

Research aim is to develop a method of reducing dust and gas emissions concentration at bulk explosions in open pits. Research relevance. When drilling and blasting in open pits, a huge amount of dust and toxic gaseous products is released, and the rate of their formation is affected by the blasting method, the range of explosives used, the method of drilling blast holes, type and sort of stemming, massif water content, rock properties, meteorological conditions, etc. It has been established that in an explosion of 1 kg of explosives, 15% from an average of 900 liters of various gases and gase

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34

Şimon-Marinică, Adrian Bogdan, and Zoltan Vass. "Automation of physical experiments regarding explosions of air-methane mixtures." MATEC Web of Conferences 305 (2020): 00013. http://dx.doi.org/10.1051/matecconf/202030500013.

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In the following study, experimental results are obtained from an automated stand. With the help of this experimental stand, visualization techniques such as Schlieren and Shadowgraph can be applied, to study the flame front propagation of air and inflammable gas mixtures initiation. In parallel, an infrared sensor was used to control a push-pull solenoid to open the gas escape diaphragm of the stand. To obtain the explosive gas mixture at various concentrations (between the lower explosion limit and the upper explosion limit) an original programmable mixer was used, based on computational alg

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35

Крисанова, В. Ю., К. Д. Старостин, А. В. Довбня, and А. А. Шеков. "FEATURES OF FORENSIC EXAMINATION OF EXPLOSION AND FIRE IN INTERNAL AFFAIRS AUTHORITIES OF RUSSIAN FEDERATION." Digest of research works "Criminalistics: yesterday, today, tomorrow", no. 2(22) (June 30, 2022): 94–107. http://dx.doi.org/10.55001/2587-9820.2022.22.91.010.

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Производство судебных экспертиз по фактам произошедших взрывов и пожаров являются одними из наиболее сложных в работе экспертов. Это связано как с существенным изменением или уничтожением вещной обстановки на местах происшествия, так и с многообразием исследуемых в рамках экспертиз ситуаций и объектов. В случаях, когда на месте происшествия имели место как взрыв, так и пожар, что наиболее часто происходит при взрывах топливно-воздушных смесей и пожарах на складах хранения взрывчатых веществ и боеприпасов, требуется производство соответствующих комплексных экспертиз. В статье рассмотрены вопрос

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36

Rebezov, Sergey, and Artem Timoshenko. "METHOD FOR DETERMINING THE OPTIMAL HEIGHT OF THE GAS ANALYZER FOR SMALL LEAKS OF HYDROGEN-CONTAINING GAS." NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) 2024, no. 1 (2024): 6–15. http://dx.doi.org/10.61260/2307-7476-2024-1-6-15.

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Анотація:

To date, safety measures for storage of hydrogen in liquefied or gaseous state, requirements to storage rooms of this substance, necessary equipment to be installed in such rooms are incompletely studied. At small hydrogen leaks there is an explosion and fire hazard consisting in formation of explosive clouds for a long period of time, in some cases the formation of local clouds of explosive hydrogen-air mixtures automatic gas analyzers cannot fix. The purpose of this work is to determine the optimal height of the gas analyzer in a relatively airtight, unventilated room in which technological

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37

Dilip, Kumar Kuila, and C. Lahiri S. "Identification of explosives and constituents of fuel oil in ANFO using HPTLC and GC-MS technique." Journal Of Indian Chemical Society Vol. 84, Jan 2007 (2007): 74–82. https://doi.org/10.5281/zenodo.5811763.

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Central Forensic Science Laboratory, 30, Gorachand Road, Kolkata-700 014, India <em>E-mail</em> : kuiladk@rediffmail.com Kalyani Government Engineering College, Kalyani-741 235, West Bengal, India <em>E-mail</em> : sujitclahiri@yahoo.com <em>Manuscript received 21 August 2006, accepted 7 November 2006</em> ANFO (a mixture of NH<sub>4</sub>NO<sub>3</sub> + 5-6% fuel oil), the dominant explosive used by the blasting industry can easily be smuggled from the source or can be prepared easily. Most of the blasting incidents in West Bengal were found to be due to low cost explosive ANFO (of NH<sub>4<

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38

Adamenko, N. A., G. V. Agafonova, D. A. An, A. V. Kazurov, and V. S. Pirozhenko. "RESEARCH OF THERMOMECHANICAL PROPERTIES OF UHMWPE AND ITS COMPOSITE WITH QGP AFTER EXPLOSIVE COMPRESSION." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 2(249) (February 25, 2021): 30–33. http://dx.doi.org/10.35211/1990-5297-2021-2-249-30-33.

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Анотація:

To develop the technology of explosive pressing of ultrahigh molecular weight polyethylene (UHMWPE) and its powder composite mixtures with inorganic fillers, the thermomechanical properties of an unfilled polymer and a composite containing 3% coke graphite powder (KGP) after explosive pressing were studied. It was found that explosive pressing with a pressure of 0.25-1.3 gpa provides high heat resistance of UHMWPE and the studied composite (154-156 °C), and the filler restrains the thermal deformation expansion of the polymer, which is associated with increased intermolecular and adhesive inte

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39

Škrlec, Vinko, Muhamed Sućeska, Mario Dobrilović, and Josip Vincek. "Detonability of Ammonium Nitrate Mixtures with the Addition of Organic Materials." Applied Sciences 14, no. 4 (2024): 1580. http://dx.doi.org/10.3390/app14041580.

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As an oxygen carrier and a strong oxidising agent, ammonium nitrate can create an explosive mixture when mixed with organic material. A typical example is the mixture of ammonium nitrate and fuel oil (ANFO), which is the most used explosive for civilian applications. In this work, we studied the detonability and detonation properties of mixtures of ammonium nitrate with recycled rubber and hay. The main goal of this study was to determine the optimal volume ratio of ammonium nitrate and organic materials in terms of achieving the best performance (working capacity). Using small experiments, it

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40

Okhotnikov, Mikhail, Alexandra Guzhva, and Irina Claptyuk. "FEATURES OF THE STUDY OF FIRES ASSOCIATED WITH EXPLOSIONS OF FUEL-AIR MIXTURES." Problems of risk management in the technosphere 2023, no. 4 (2024): 156–66. http://dx.doi.org/10.61260/1998-8990-2024-2023-4-156-166.

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Анотація:

Explosions of fuel-air mixtures and their accompanying fires are perhaps the most common emergencies. A high probability of this kind of emergency is typical for both industrial facilities and the residential sector. When studying fires associated with deflagration (explosive) gorenje fuel-air mixtures, experts often face a number of questions that are difficult to solve when using the standard methodological approach used in the study of a classic fire. The article presents an expert analysis of fires caused by the ignition (explosion) of a fuel-air mixture. The paper also presents stat

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41

KROKHALEV, A. V., D. R. CHERNIKOV, D. V. ROSSEIN, et al. "USE OF EXPLOSION PRESSING AND THERMICAL PROCESSING FOR THE PRODUCTION OF MATERIALS ON THE BASIS OF METASTABLE PHASE TI2FE." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 11(294) (November 2024): 57–65. https://doi.org/10.35211/1990-5297-2024-11-294-57-65.

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The basic regularities of formation of structure and phase composition of materials of Fe-Ti system at compaction by explosion of powder mixtures of titanium and iron are considered. The influence of the mechanism of plastic deformation of powder particles on the process of formation of metastable intermetallic phase Ti2Fe with increased hydrogen capacity has been found out. It is shown that an effective method of obtaining materials based on Ti2Fe is the combination of explosive pressing of a mixture of Fe and Ti powders with subsequent thermal treatment in the intercritical temperature range

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42

Vledouts, A., J. Quinard, N. Vandenberghe, and E. Villermaux. "Explosive fragmentation of liquid shells." Journal of Fluid Mechanics 788 (January 5, 2016): 246–73. http://dx.doi.org/10.1017/jfm.2015.716.

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Анотація:

The forced radial expansion of a spherical liquid shell by an exothermic chemical reaction is a prototypical configuration for the explosion of cohesive materials in three dimensions. The shell is formed by the capillary pinch off of a thin liquid annular jet surrounding a jet of reactive gaseous mixture at ambient pressure. The encapsulated gas in the resulting liquid bubble is a mixture of hydrogen and oxygen in controlled relative proportions, which is ignited by a laser plasma aimed at the centre of the bubble. The strongly exothermic combustion of the mixture induces the expansion of the

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43

Mao, Xiaoxiang, Longfei Jiang, Chenguang Zhu, and Xiaoming Wang. "Effects of Aluminum Powder on Ignition Performance of RDX, HMX, and CL-20 Explosives." Advances in Materials Science and Engineering 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/5913216.

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As a kind of high explosives, aluminized explosive cannot release the energy maximumly, which is a key problem. Using DTA-TG equipment, the ignition performance of three kinds of aluminized explosives (RDX, HMX, and CL-20) with different mass percentages of aluminum powder (0%, 10 wt.%, 20 wt.%, and 30 wt.%) was investigated. The results showed that the energy release of the HMX/Al composite explosive with 10 wt.%, 20 wt.%, and 30 wt.% aluminum powder was only equivalent to 80%, 65%, and 36% of pure HMX, respectively. It was similar to RDX/Al and CL-20/Al composite explosives, except the CL-20

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44

Zhang, Shengzhu, Xu Wang, Y. Frank Cheng, and Jian Shuai. "Modeling and analysis of a catastrophic oil spill and vapor cloud explosion in a confined space upon oil pipeline leaking." Petroleum Science 17, no. 2 (2019): 556–66. http://dx.doi.org/10.1007/s12182-019-00403-2.

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Abstract Oil spill-induced vapor cloud explosions in a confined space can cause catastrophic consequences. In this work, investigation was conducted on the catastrophic pipeline leak, oil spill, and the resulting vapor cloud explosion accident occurring in China in 2013 by modeling analysis, field surveys, and numerical simulations. The total amount of the spilled oil was up to 2044.4 m3 due to improper disposal. The long residence time of the oil remaining in a confined space permitted the formation of explosive mixtures and caused the vapor cloud explosion. A numerical model was developed to

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45

Ilici, Stefan, Edward Gheorghiosu, Daniela Rus, and Ciprian Jitea. "Research in the field of evaluation of anfo explosive preparation installations, Tests and results." MATEC Web of Conferences 342 (2021): 01003. http://dx.doi.org/10.1051/matecconf/202134201003.

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Анотація:

The technical-economic efficiency of rock extraction works depends significantly on the drilling and blasting works as well as the adjacent costs. The cost of the explosive is an important component in these and the generalization of the widespread use of the use of bulk explosives (ANFO) has generated a significant reduction in the cost. Making the explosive close to the place of use in fixed or semi-stationary installations on the quarry stage eliminates the costs related to storage or long-term storage, transport, escort, security. However, installations for the manufacture of ANFO type exp

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46

Nalboc, Irina, Maria Prodan, Andrei Szollosi-Mota, and Sonia Niculina Suvar. "Experimental determination of the lower explosion limit for two gasoline samples." MATEC Web of Conferences 373 (2022): 00009. http://dx.doi.org/10.1051/matecconf/202237300009.

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Анотація:

The explosive atmosphere may be caused by flammable gases / vapours or combustible dust. If the amount of the substance, mixed with air, is sufficient, then a source of ignition is needed to cause an explosion. Liquids (for example petrol and other fuels) and solvents from industrial products emit flammable vapours which, when mixed with air, can ignite or explode. At normal temperatures, flammable liquids can emit enough vapours to form combustible mixtures with air, heat, and often thick, black, and toxic clouds of smoke. The behaviour of a fuel-oxidant mixture is characterized by certain ex

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47

Kharlamov, V. O., Aleksandr Vasilevich Krokhalev, S. V. Kuz’min, and V. I. Lysak. "Investigation of the Structure and Distribution of Chemical Elements between the Phases of Hard Alloys of the Cr₃C₂-Ti System, Obtained at Various Modes of Explosive Compaction." Materials Science Forum 992 (May 2020): 487–92. http://dx.doi.org/10.4028/www.scientific.net/msf.992.487.

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The Article presents the findings of the studies of the microstructure, chemical and phase composition of the Cr3C2-Ti system alloys obtained by the explosion. Scanning electron microscopy, energy dispersive and x-ray diffraction analyses were used. The program Thermo-Calc software was used to calculate the equilibrium phases. The phase composition of the compact was shown to fully correspond to that of the initial powder mixture during explosive pressing in the modes of heating from 300 ̊С to 600 ̊С. When heated above 600 ̊С, the chemical interaction of the initial components begins with the

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48

Labinsky, Alexander. "ON THE ISSUE OF ASSESSING THE CONSEQUENCES OF EMERGENCY SITUATIONS." MONITORING AND EXPERTISE IN SAFETY SYSTEM 2023, no. 3 (2023): 9–13. http://dx.doi.org/10.61260/2304-0130-2023-3-9-13.

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Анотація:

The dangerous factors during the combustion and explosion of petroleum products, which are the air shock wave and thermal radiation, are considered. An assessment is made of the consequences  of violations of the conditions of storage and transportation (shipment) of flammable liquids and petroleum products caused by the processes of evaporation and combustion with the subsequent explosion of vapors  of these substances. An assessment was made of the consequences of the formation of a cloud of steam-air mixture, which include explosive combustion and shock wave propagation. An exam

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49

Adamenko, N. A., G. V. Agafonova, D. V. Savin, V. S. Pirozhenko, D. A. An та A. V. Kazurov. "RESEARCH OF THERMAL PROPERTIES AND STRUCTURE OF UHMWPE COMPOSITES WITH β-SIALON AFTER EXPLOSIVE PRESSING". IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, № 10(245) (29 жовтня 2020): 30–34. http://dx.doi.org/10.35211/1990-5297-2020-10-245-30-34.

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Анотація:

With the aim of developing a technology for explosive pressing of powder composite mixtures of ultra-high molecular weight polyethylene (UHMWPE) with inorganic fillers, the thermomechanical properties and structure of a composite containing 5% β-sialon after static and explosive pressing were investigated. It was found that explosive pressing with a pressure of 0.75 GPa provides a composite heat resistance close to that of the initial UHMWPE (142-148 °C), reducing its thermal deformation expansion, which is associated with an increase in intermolecular as well as adhesive interaction at the ph

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50

Methling, Ralf, S. Franke, Carsten Uber, et al. "Optical Emission Spectroscopy of Cadmium Dominated Discharges Applied for Assessment of Explosion Protection." PLASMA PHYSICS AND TECHNOLOGY 10, no. 1 (2023): 47–51. http://dx.doi.org/10.14311/ppt.2023.1.47.

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An assessment for the safe use of electrical equipment in explosive atmospheres can be performed with the aid of a spark test apparatus. Therefore, an anodic tungsten wire with 200 µm diameter is moved along the surface of a rotating cadmium disc (cathode). The explosion chamber enclosing the electrodes is filled with a highly explosive mixture of hydrogen and air. Depending on surface topology and relative movement of the contact pair, discharges occur randomly. A model contact device is used to investigate the plasma properties and the discharge characteristics near the thermo-chemical ignit

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