Frequency comparison of blast-induced vibration per delay for the full-face millisecond delay blasting in underground opening excavation

Yang, Jianhua; Lu, Wenbo; Jiang, Qinghui; Yao, Chi; Zhou, Chuangbing

doi:10.1016/j.tust.2015.10.036

Cited by 73 publications

(40 citation statements)

References 26 publications

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“…Equations (1) and (2) show that the mass and energy distribution is closely associated with the length parameters a and b. It is not hard to draw from equations (3) and (4) that the detonation products and the explosion energy are preferentially distributed to the forward direction of the detonation wave.…”

Section: Energy Distribution Effect Along the Detonation Directionmentioning

confidence: 99%

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Effect of Initiation Location within Blasthole on Blast Vibration Field and Its Mechanism

Gao

Leng

et al. 2019

Shock and Vibration

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In drill and blast, the explosive filled in each blasthole is cylindrically shaped and generally initiated by the detonator. Thus, the effect of the initiation location must be addressed, as it determines the detonation direction along the entire column explosive. In this paper, the effect of the initiation location on blast vibration field and its acting mechanism were comprehensively investigated through the theoretical, computational, and experimental approaches. The results indicate that the initiation location plays an important role in the blast vibration filed of the cylindrical charge. The underlying effect of the initiation location can be regarded as the combined results of the energy distribution and phase delay effects of the column explosive source. The behavior of the rock mass in the single-hole blasting experiment demonstrates that the explosion energy is preferentially transmitted to the forward direction of the detonation wave. The seed wave-based computation model verifies that owing to the phase delay effect, the blast vibration field of the cylindrical charge is not uniformly distributed and is strengthened at the forward direction of the detonation wave. The production blasting experiment indicates that the ground PPV under bottom initiation is 61.3%∼211.7% larger than that under top initiation. In addition, the effect of the initiation location is sensitive to the charge length L and the denotation velocity D. Meanwhile, the effect of the initiation location vanishes with distance. The present study provides valuable reference for understanding the effect of the initiation location on blast vibration in drill and blast.

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Section: Energy Distribution Effect Along the Detonation Directionmentioning

confidence: 99%

“…Drill and blast, as an economical, efficient, and adaptable method, is still widely used in mining, hydropower, traffic, and civil engineering fields [1][2][3][4][5]. In practice, the blastholes are charged either by the finished explosive charge (Figure 1(a)) or by the semifinished charging vehicle (Figure 1(b)).…”

Section: Introductionmentioning

confidence: 99%

Effect of Initiation Location within Blasthole on Blast Vibration Field and Its Mechanism

Gao

Leng

et al. 2019

Shock and Vibration

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“…Blast-induced vibration affects the stability of surrounding rocks and threatens the safety of neighboring buildings or structures. Numerous studies have been published on the responses and damage to structures subjected to blastinduced vibration [1][2][3][4]. Most of the explosive energy is consumed in breaking the rocks, causing the vibration and throwing out the fragments.…”

Section: Introductionmentioning

confidence: 99%

Field Tests on the Attenuation Characteristics of the Blast Air Waves in a Long Road Tunnel: A Case Study

Fang

Yilun

Zhou

et al. 2019

Shock and Vibration

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After an explosion occurs in a tunnel, the blast waves take on diverse forms of attenuation in different regions when it propagates along the tunnel. However, the prediction of the overpressure decay laws proposed in previous studies has not taken into account the influence of the different regions in the tunnel. The present paper uses the example of the Micangshan highway tunnel in China and considers many factors that influence the propagation of the blast waves by dividing the tunnel into four zones. The paper modifies the decay equation proposed by Smith and applies it to the Micangshan highway tunnel in China. The decay equations are different in different zones. Field tests in this tunnel show that the modified equation is more suitable to describe the attenuation of the blast waves in the tunnel than the original equation.

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“…[1][2][3][4][5] El software elegido para la simulación de los resultados de la voladura ha sido utilizado también por diversos autores en varios trabajos. [6][7] En la cantera elegida se han llevado a cabo previamente otros estudios para modelizar algunos parámetros en otro tipo de voladuras.…”

Section: Introductionunclassified

Simulación y evaluación de una voladura de producción en una cantera mediante análisis con el software JKSimBlast, perfilometría láser 2D y sismógrafos.

Medina

Romo

2017

RCTU-UPSE

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En la cantera de árido de estudio se extrae roca caliza para su explotación como material de construcción. La función principal de las voladuras de producción es obtener mediante el uso de explosivos civiles, un tamaño de bloque adecuado para la planta de trituración, conseguir un frente de talud estable, bien marcado y rectilíneo para garantizar la estabilidad de la explotación y minimizar las vibraciones en las estructuras y zonas de interés circundantes. Para ello se define una voladura tipo en la que se simulan y evalúan los principales parámetros de diseño mediante el uso del software JKSimBlast, un perfilómetro 2D y dos sismógrafos, buscando conciliar una producción óptima con un nivel mínimo de vibraciones en las zonas a monitorear. AbstractAt the studied quarry, limestone is extracted for its exploitation as construction material. The main functions of production blasts are to obtain, by using civil explosives, a suitable block size for the crushing plant, to achieve a stable, well-marked and rectilinear slope, to guarantee the stability of the operation and to minimize the vibrations in the surrounding structures and areas of interest. For this, a type blast is defined in which the main design parameters are simulated and evaluated using JKSimBlast software, a 2D profiler and two seismographs, seeking to reconcile optimal production with a minimum level of vibration in the areas to be monitored.

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Frequency comparison of blast-induced vibration per delay for the full-face millisecond delay blasting in underground opening excavation

Cited by 73 publications

References 26 publications

Effect of Initiation Location within Blasthole on Blast Vibration Field and Its Mechanism

Effect of Initiation Location within Blasthole on Blast Vibration Field and Its Mechanism

Field Tests on the Attenuation Characteristics of the Blast Air Waves in a Long Road Tunnel: A Case Study

Simulación y evaluación de una voladura de producción en una cantera mediante análisis con el software JKSimBlast, perfilometría láser 2D y sismógrafos.

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