Perspectives in the stability of emulsion explosive

Zhang, Kaiming; Zhao, Hai-rong

doi:10.1016/j.cis.2022.102745

Cited by 14 publications

(5 citation statements)

References 94 publications

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“…The impact of these additives is more pronounced in the case of ANFO produced using liquid paraffin, due to the higher viscosity of this fuel, which translates into more facile entrapment of gaseous SPC/SPB decomposition products inside this phase. Gas bubbles generated during this process might work as hot-spots, in a manner similar to bubbles generated during the chemical sensitization of explosives [14]. In the case of naphtha-based ANFO, the trend is similar, except for ANFO supplemented with Mg(ClO 4 ) 2 , which shows a markedly lower decomposition temperature.…”

Section: Determination Of Sample Decomposition Temperature and Pseudo...mentioning

confidence: 84%

Towards “Green” ANFO: Study of Perchlorates and Inorganic Peroxides as Potential Additives

et al. 2023

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Ammonium nitrate–fuel oil (ANFO) explosives are inexpensive and readily produced, but are highly prone to misfires, with the remaining explosive being a significant risk and environmental contaminant. In this work, studies on various additives, such as selected perchlorates and inorganic peroxides, which are intended to lower the susceptibility of ANFO to misfires by increasing its sensitivity to shock, have been conducted. These studies showed the viability of using these additives in ANFO, allowing for conducting shock wave sensitivity tests for bulk charges in the future. We investigated the effects of introducing these additives into ANFO (on its sensitivity), as well as thermal and energetic properties. We observed minor increases in friction and impact sensitivity, as well as a moderate reduction in the decomposition temperature of the additive-supplemented ANFO in comparison to unmodified ANFO.

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Section: Determination Of Sample Decomposition Temperature and Pseudo...mentioning

confidence: 84%

Towards “Green” ANFO: Study of Perchlorates and Inorganic Peroxides as Potential Additives

et al. 2023

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“…There are three main types of cracking stone products, which are mining explosives, static cracking agents, and thermal expansion cracking agents. For a long time, mining explosives have been dominant in cracking agent products, but they have been criticized due to their shortcomings such as excessive pollution, low work efficiency, high labor intensity, and low safety during operation, − so the use of mining explosives is also limited to a certain extent. As the use of mining explosives is limited, people have developed a product static expansion agent that relies on the expansion force generated by the hydration reaction of calcium oxide to achieve the effect of rock fracture.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Transient Thermal Expansion Rock Cracking Agent by Deposition Method and Its Nonisothermal Kinetics Study with Isoconversional Procedure and DAEM

et al. 2023

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Cracking agents are indispensable and important products for national energy exploitation and large-scale infrastructure construction. Transient thermal expansion rock cracking agent is a new cracking agent product with excellent performance that has just appeared in recent years. However, it is still prepared by mechanical ball milling, which is considered not the best choice among traditional methods for preparing energetic materials. In this paper, a transient thermal expansion rock splitting agent was prepared by the chemical deposition method using carbon black and calcium peroxide as raw materials. The TG/DTG results show that the mass loss of the sample can be divided into four stages with the increase of temperature. It is worth noting that the mass loss of the TG curve of the sample during the entire thermal decomposition process is 93.385%, and the instantaneous weight loss is 78.07% (β = 15 °C/min). Kinetic analysis of the thermal decomposition process of the samples was performed using an isotransformation program and a distributed activation energy model (DAEM). The activation energy E α of the thermal decomposition of the sample was iteratively calculated. The results show that the a–E a curve of the sample can be divided into two stages. The pyrolysis kinetics of the first stage was successfully analyzed by the DAEM method and its thermal conversion behavior was predicted. The thermal decomposition behavior of the second stage was analyzed by a traditional kinetic analysis method.

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“…The ideal blasting effect is a topic of concern for deep blasting operations, and it has a non-negligible impact on the subsequent engineering activities, so it is significant to achieve the ideal effect and increase the controllability by some method improvements. For this reason many scholars have also done a lot of research on it, some of them from the perspective of explosives improvement [1][2] 23, some of them from the level of blasting environment 3 , rock pretreatment 4 , etc. Due to the extensive research at the level of explosives improvement and the complexity of the natural environment, it seems more reasonable to use the rock pretreatment approach for blasting analysis.…”

Section: Introductionmentioning

confidence: 99%

Research on the damage characteristics of rock masses based on double guide-hole blasting under high In-situ stress

Xie

Ma³

et al. 2023

Preprint

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In complex high In-situ stress conditions, how to achieve ideal rock blasting effect by effective methods is often a difficult point in blasting operations. In this paper, we analyze the effect of guide holes on blasting effect by adding guide holes to the rock pre-treatment method, and carry out double-hole blasting experiments based on the blast point particle expansion method. The effect of blasthole spacing and ground stress on blasting effect is investigated at macroscopic crack effect, microscopic particle contact and stress response level. The study shows that: (i) The crack penetration effect can be enhanced by setting guide holes between blastholes, and the penetration effect is more obvious when the distance between blasthole and guide holes is less than 2.5 times the radius of the crushing zone. (ii) At the contact force chain level, when the distance between blasthole and guide hole is less than 2.0 times the radius of crushing zone, the pressure stress perpendicular to the direction of blasthole linkage inhibits the development of crack, and the pull stress parallel to the direction of blasthole linkage promotes the development of crack; at the contact number level, the distance between blasthole and guide hole The main force direction is perpendicular to the blasthole line direction when the contact number level is less than 2.0 times the radius of the crushing zone. (iii) With the increase of distance between blasthole and guide hole, the inhibition of crack by stress in the vertical direction is weakened, and the main force direction is parallel to the blasthole line direction.

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Perspectives in the stability of emulsion explosive

Cited by 14 publications

References 94 publications

Towards “Green” ANFO: Study of Perchlorates and Inorganic Peroxides as Potential Additives

Towards “Green” ANFO: Study of Perchlorates and Inorganic Peroxides as Potential Additives

Preparation of a Transient Thermal Expansion Rock Cracking Agent by Deposition Method and Its Nonisothermal Kinetics Study with Isoconversional Procedure and DAEM

Research on the damage characteristics of rock masses based on double guide-hole blasting under high In-situ stress

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