Emulsion Explosives: A Tutorial Review and Highlight of Recent Progress

Kramarczyk, Bartłomiej; Suda, Krystyna; Kowalik, Patrycja; Swiatek, Kuba; Jaszcz, Katarzyna; Jarosz, Tomasz

doi:10.3390/ma15144952

Cited by 8 publications

(4 citation statements)

References 39 publications

(46 reference statements)

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“…Therefore, after the contraction of the hole wall, as shown by the black dotted line. Using the #2 rock emulsion explosive as the material, the keyword *MAT_HIGH_EXPLOSIVE_BURN in LS-DYNA is used to build the models, and the parameters are shown in Table 3 (Kramarczyk, Bartlomiej et al 2022). The blast hole diameter is 32 mm using coupling loading.…”

Section: Damage Partitionmentioning

confidence: 99%

WITHDRAWN: Theoretical analysis model and optimization scheme of shape-effect damage in cut blasting

qin,

Zhao,

wang

et al. 2023

Preprint

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To explore the rock-breaking mechanism of cut blasting under the influence of empty holes, based on the principles of the empty hole effect, stress concentration effect and expansion space theory, the stress distributions of empty hole walls are calculated, and a two-dimensional damage analysis model of shape-effect segmented blasting is established. On this basis, the theoretical analysis model of square hole cutting is given as an optimization scheme, and the model is demonstrated by numerical simulation. The results show that the optimized load function γq2sinθ with time is consistent with the actual stress of the hole wall, and the change trend of the theoretical calculation is consistent with the simulation results. The change in the shape of empty holes in a rock mass will affect the stress distribution of the surrounding rock mass. The stress waves with square holes cause tensile–shear failure in a wide range of rock around the hole wall, while the rock near the circular hole wall produces ring-shaped failure. The reflected tensile stress waves are influenced by the impedance of the circular hole. In the optimized scheme, the cracks around the holes are uniformly connected, the rock mass collapses inward under the influence of the holes and the two-stage stress waves, and the utilization rate of the hole space reaches 56.091%.

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Section: Damage Partitionmentioning

confidence: 99%

WITHDRAWN: Theoretical analysis model and optimization scheme of shape-effect damage in cut blasting

qin,

Zhao,

wang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Using the # 2 rock emulsion explosive as the material, the keyword *MAT_HIGH_EXPLOSIVE_BURN in LS-DYNA is used to build the models, and the parameters are shown in Table 3 26 . The blast holes diameter is 32 mm using coupling loading.…”

Section: Model Buildingmentioning

confidence: 99%

Damage prediction and improvement method based on cutting mode of circular empty hole

Qin,

Zhao,

Wang

et al. 2024

Sci Rep

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Based on the theory of empty hole effect of cutting blasting, the Hopkinson effect and Saint–Venant principle are integrated to establish a two-dimensional calculation model of dynamic stress evolution of the holes wall, and then the dynamic fracture mechanism and damage distribution mode of the rock mass in the cutting area under the action of longitudinal waves are predicted. The results of the calculation and numerical simulation are verified by experiments, and the results show that: The time-varying stress function of the circular cavity wall conforms to the periodic dynamic evolution of the trigonometric function, and the theoretical calculation is consistent with the simulation results. Through the calculation of the round holes cut model and the square empty hole cut model, the change of the shape of the holes in the cut area changes the failure form of the surrounding rock mass. The circular empty hole wall is affected by the stress wave to produce "interval ring" destruction, and the effect of the reflected stretch wave is inhibited. The large range of rock mass in the square empty hole wall produces tensile and shear failure, and the rock mass collapses inward under the influence of the second stage stress. Among them, the empty space utilization rate of the square empty hole model is about 8.5 times that of the circular holes model. Vibration monitoring in the center of the cutting area shows that the vibration effect of the circular empty hole is larger than that of the square empty hole, and the proportion of rock breaking energy is lower.

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“…BEMs are a subset of a much larger ensemble represented by energetic materials (EMs), mainly comprising explosives [34,35], pyrotechnics [36] and propellants [37,38] with several applications in the real world, including micromechanical systems [39] and safety devices typically adopted in automotive technology [40].…”

Section: Basic Variables and Properties Of Ems And Bemsmentioning

confidence: 99%

Organic and Inorganic Biocidal Energetic Materials for Agent Defeat Weapons: An Overview and Research Perspectives

et al. 2023

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A critical survey concerning biocidal energetics is proposed according to a classification depending on their chemical structure. The need of optimizing the performances of such compounds is an important target for the inertization of biological weapons, requiring a synergy between the thermal effects of combustion/detonation with the biocidal effects of reaction products released into the environment. The main physicochemical aspects related to the synthesis technique, the thermodynamic variables and the antimicrobial activity have been discussed and compared. In particular, different kinds of biocides have been taken into account, with particular attention to the role of iodine as one of the most promising and eco-friendly chemical species to this purpose, in line with the paradigms of environmental protection and the rational utilization of chemicals. Furthermore, the protocols adopted to assess the effectiveness of biocidal agents have been thoroughly examined according to the recent studies proposed by some of the most reputable research groups in the field. Finally, some insights for future investigations are proposed.

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Emulsion Explosives: A Tutorial Review and Highlight of Recent Progress

Cited by 8 publications

References 39 publications

WITHDRAWN: Theoretical analysis model and optimization scheme of shape-effect damage in cut blasting

WITHDRAWN: Theoretical analysis model and optimization scheme of shape-effect damage in cut blasting

Damage prediction and improvement method based on cutting mode of circular empty hole

Organic and Inorganic Biocidal Energetic Materials for Agent Defeat Weapons: An Overview and Research Perspectives

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