Structural Evolution and Microstructural Features of the Hydrodynamically Penetrating Copper Jet of a Shaped Charge

Baykara, T.; Günay, Volkan; Demirural, Alparslan

doi:10.1007/s11665-021-05514-9

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Since then, important progress in shaped charge blasting has been made in mining, oil and gas exploitation, and tunnel excavation. 25 − 27 Yang et al used the dynamic caustics experimental method to study the crack propagation behavior related to slit charge blasting under such high static stress conditions. 28 , 29 Meng et al applied shaped charge blasting to directionally fracture the hard roof and release the mining pressure, and they identified the failure type of the rock mass and the fracture development area.…”

Section: Introductionmentioning

confidence: 99%

“…After the end of World War II, shaped charge became gradually popular in the industrial field. Since then, important progress in shaped charge blasting has been made in mining, oil and gas exploitation, and tunnel excavation. − Yang et al used the dynamic caustics experimental method to study the crack propagation behavior related to slit charge blasting under such high static stress conditions. , Meng et al applied shaped charge blasting to directionally fracture the hard roof and release the mining pressure, and they identified the failure type of the rock mass and the fracture development area . Yin found that the optimal blasting effect, which has the longest directional cracks, few nondirectional cracks, and light damage to the surrounding rock, can be achieved by decoupling shaped charge blasting .…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement

et al. 2022

ACS Omega

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The dynamic effect of shaped charge blasting and its application in coal seam permeability enhancement have been investigated. Comparative experiments of shaped charge blasting and conventional blasting to fracture the concrete are carried out. Then, the propagation characteristics of explosion stress waves under shaped charge blasting and conventional blasting are analyzed by ANSYS/LS-DYNA. Finally, the fracture mechanical model of shaped charge blasting is established. The experimental results show that the width of the four main cracks formed after conventional blasting is 0.3 cm, while the width of the cracks in the energy accumulation direction after shaped charge blasting is 1.1 cm and the width of that in the vertical energy accumulation direction is 0.4 cm. The numerical simulation results show that the crushing area after shaped charge blasting is “dumbbell type”, and the area is smaller than that of conventional blasting. However, the cracking area is “spindle type”, and the development of the fracture degree is better than that of conventional blasting. In addition, shaped charge blasting is used to improve the permeability of coal seams. The results show that shaped charge blasting effectively improves the permeability and gas extraction rate of coal seams.

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