Study on the liquefaction characteristics of saturated sands by millisecond delay blasting

Chen, Yumin; Li, Changchun; Wang, Weiguo; Liu, Hanlong; Yao, Yao; Ni, Songtao; Sarajpoor, Saeed

doi:10.1016/j.soildyn.2022.107584

Cited by 4 publications

(2 citation statements)

References 47 publications

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“…Additionally, the ultra depth value is affected by the properties and structure of the rock mass, exhibiting a certain degree of proportionality with the diameter of the blast hole, as shown in Equation (1).…”

Section: Blasting Plan and Parameter Designmentioning

confidence: 99%

“…Due to its relatively low cost and high efficiency [1,2], blasting technology is widely adopted in various engineering applications across a wide range of domains, such as mining, transport infrastructure construction, and building demolition [3][4][5]. In recent years, a large number of new blasting equipment has entered the blasting industry, among which the digital electronic detonator has been highly recognized by many researchers and users due to its simple operation, high delay accuracy, and detectable blasting network [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

Zhang,

Li,

Wei

et al. 2024

Applied Sciences

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Blasting technology is widely applied in various engineering applications due to its cost-effectiveness and high efficiency, such as in mining, transport infrastructure construction, and building demolition. However, the occurrence of cracking in the rear row has always been a major problem that disrupts mining bench blasting. To address this issue, a three-hole simultaneous blasting technology is proposed in this study. Both numerical simulations and onsite blasting experimental testing were conducted. To aid this endeavor, the three-hole simultaneous blasting and the hole-by-hole blasting methods were adopted to comparatively analyze the severity of the damage caused to the original rock and the effect of rock fragmentation in the rear row. The obtained results highlighted that the outcome of the blast produced by the three-hole simultaneous blasting method is satisfactory, with fewer flying stones and concentrated blasting piles required. Additionally, the original rock in the rear row showed no obvious sign of tensile damage and had uniform fragmentation. It was also found that a block size of less than 60 cm accounts for 100%, while a block size of less than 50 cm accounts for 98.7% of the whole blocks, with no large blocks reported. Moreover, a penetrating horizontal crack occurred in the direction of the connection of the blast hole center when the three-hole simultaneous blasting method was adopted. This resulted in a smooth and flat rear part of the rocks at the interface. Compared to the hole-by-hole blasting method, the three-hole simultaneous blasting method improved the effective stress and displacement at each measurement point. At the measurement point directly at the front of the borehole, the maximum effective stress attained 67.9 GPa, and the maximum displacement reported was 31.9 cm. Overall, it was shown that the three-hole simultaneous blasting technology is applicable in similar applications of mine bench blasting, which is conducive to addressing the rear row original rock strain for onsite bench blasting.

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Section: Blasting Plan and Parameter Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

Zhang,

Li,

Wei

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

Numerical modelling of rock fragmentation under high in-situ stresses and short-delay blast loading

Hong,

Tao,

Zhao

et al. 2023

Engineering Fracture Mechanics

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Field test and numerical research on explosion crater in calcareous sand

Li,

Chen,

Yao

et al. 2024

Sci Rep

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The explosion in foundation poses a significant threat to people and buildings. Currently, a unified empirical prediction formula for crater in calcareous foundation has not been established. In this paper, analyzed the types and sizes of explosion crater with different scaled burial depths through field tests and numerical simulation. In field tests, revealed the influence of scaled burial depth on the type and size of explosion crater and obtained the critical scaled burial depth for three different types of explosion craters, namely ejecta-type crater, collapse-type crater and covert explosion. Through the Smooth Particle Hydrodynamic-Finite Element Method (SPH-FEM) coupling algorithm, studied the movement trajectory of sand particles around the explosive at the moment of explosion in detail. Based on the field tests and numerical simulation results, it was found that calcareous sand has a smaller specific gravity due to its own characteristics, and the size of the explosion crater is larger than that of quartz sand at the same scaled burial depth. Obtained an empirical formula for crater in calcareous sand. Which can quickly predict the size of explosion crater and provide calculation basis for explosion resistant design in calcareous sand foundations.

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Study on the liquefaction characteristics of saturated sands by millisecond delay blasting

Cited by 4 publications

References 47 publications

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

Numerical modelling of rock fragmentation under high in-situ stresses and short-delay blast loading

Field test and numerical research on explosion crater in calcareous sand

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