Numerical Studies Regarding Underwater Detonation

Pana, Iuliana-Florina; Puica, C; Goga, Doru-Adrian; Nuta, Ionel

doi:10.1016/s2212-5671(15)01552-x

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…The explosion creates a temperature of about 3000 °C, a pressure of about 5000 MPa and an increase in the initial volume up to 1000 times [1,3]. The high pressure generates a shock wave, the speed of which, after a few milliseconds, decreases to the speed of sound in water (1500 m/s) [4,5]. After the shock wave, the gaseous products of the detonation form a gas bubble, which expands under high pressure and temperature [4,6].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Maximum Peak Pressures of Free Underwater Explosion by Numerical Modeling and Empirical Expressions

Durdov,

Varevac

2024

Teh. glas. (Online)

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The article compares the results of empirical expressions for the maximum peak pressures of an underwater explosion and numerical models made in hydrocode software LS-DYNA. Spherical charge of 136.08 kg TNT explosive was chosen and observed distance was up to 15 m. An overview of empirical expressions is given and the results according to several authors are compared. The Cole expression was chosen as a reference for comparison. For the purpose of the numerical modelling, the influence of the size of the finite elements of the explosive, the size and shape of the volume of water and the size of the finite elements of water was examined. The size of the finite elements of the medium (water) was shown to be the most significant parameter that affects the magnitude of the pressure results, and recommendations for modelling were given.

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Section: Introductionmentioning

confidence: 99%

Comparison of Maximum Peak Pressures of Free Underwater Explosion by Numerical Modeling and Empirical Expressions

Durdov,

Varevac

2024

Teh. glas. (Online)

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A Study on the Effect of Different Charge Structures on the Permeability Enhancement of Coal Seam Blasting

Zuo,

Zhang,

Yang

et al. 2024

Processes

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With the increasing depth of coal mining, the ground stress of coal seams rises, the gas content rises, and the permeability decreases, which is unfavorable to gas extraction and increases the possibility of gas accidents in coal mines. Blasting technology is often used to improve the permeability of coal seams and increase the effect of gas extraction, but it is difficult to control the blasting effect of ordinary flux coils, and the direction of the fissure and the degree of development of randomness, so it is important to study the effect of different flux coil structures on the blasting of coal seams to increase the permeability of the coal seam, in this paper, first of all, through the numerical simulation to analyze the effect of the blasting of the ordinary structure flux coils and the fissure change in the polygonal structure flux coils, and then make the experimental module. Then, we make the test module, build the test platform, and analyze the effect of blasting penetration of different drug coil structures by comparing the strain after blasting and the change in resistivity before and after blasting of two kinds of drug coil structures, and the results show that the polymerized drug coil can play the role of directional fracturing, and compared with the ordinary structure of the drug coil, the polymerized drug shows a better effect of fracturing and penetration increase.

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Numerical Studies Regarding Underwater Detonation

Cited by 2 publications

References 4 publications

Comparison of Maximum Peak Pressures of Free Underwater Explosion by Numerical Modeling and Empirical Expressions

Comparison of Maximum Peak Pressures of Free Underwater Explosion by Numerical Modeling and Empirical Expressions

A Study on the Effect of Different Charge Structures on the Permeability Enhancement of Coal Seam Blasting

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