Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

Pennetier, Olivier; William-Louis, Mame; Langlet, André

doi:10.1016/j.psep.2015.01.002

Cited by 33 publications

(18 citation statements)

References 17 publications

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“…Benselama [12] and Uystepruyst [13] proposed two ways of the evolution of blast wave in tunnels and simulated the propagation of subway blast wave in tunnels through numerical calculation. The model test and simulation results were roughly consistent [14]. Smith [15] established a multigroup tunnel model and investigated the effect of tunnel wall roughness on shock wave attenuation.…”

Section: State Of the Artmentioning

confidence: 60%

Investigation and Analysis on the Explosion Accident in the Mountain Tunnel

Dong¹,

Wu²,

Li³

et al. 2019

JESTR

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Blasting operation has gradually become an efficient and fast construction method with the rapid development of industrial level. In China, hole drilling smooth blasting method has been widely used in most railway tunnel projects. Therefore, substantial attention should be paid to the safety of tunnel blasting. In order to show the properties of explosive products in limited tunnel spaces and their influence on people, the overpressure damage of shock wave and the effects of heat radiation and harmful gas from explosion were checked by performing theoretical analysis and numerical simulation. This study took the sudden explosive explosion in a tunnel excavation as an example. The accuracy of the calculation and analysis results were verified by on-site investigation. The main cause of the accident and related preventive measures were also discussed. The dangerous range of casualties under different explosive charges in the tunnel was finally achieved by relating the theoretical analysis to the actual circumstance. Results show that the explosion of a large number of detonating fuses in the semi-closed tunnel is equal to the explosion of approximately 200 kg of TNT. The produced shock wave, thermal radiation, and harmful gas affect the scope of over 400 m with enormous destruction. The explosive power of a detonator cord should never be underestimated. The large number of casualties in this tunnel explosion accident highlights the importance of safety. This study provides specific reference for determining safety range in a blasting construction, which would also provide great guidance in other tunnel projects.

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Section: State Of the Artmentioning

confidence: 60%

Investigation and Analysis on the Explosion Accident in the Mountain Tunnel

Dong¹,

Wu²,

Li³

et al. 2019

JESTR

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“…ey proposed a correlation law by a numerical study to define the transition distance according to the explosive charge and the geometry of the propagating domain. Pennetier et al [26] conducted a scaled model test and numerical simulation of blast waves in tunnels and found that the data of the experimental tests fit well with the numerical simulation. In field tests, Rodríguez et al [6,27] developed a semiempirical model to predict the air wave pressure and sound level outside a tunnel due to the blasting inside.…”

Section: Introductionmentioning

confidence: 96%

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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“…Xing et al [11] revealed complex influences of goaf with different caved areas on the velocity and pressure of the air shock wave in different mining faces. Pennetier et al [12] performed experiments of the air shock flushed the tunnel and presented evolution of the pressures and velocities of both the inlet and outlet tunnel in detail with the measurements on different blasted volume. Moreover, the test instruments used in experiments were not the same, such as thermal anemometer [13], different-pressure anemometer [14], ultrasonic anemometer [15].…”

Section: Introductionmentioning

confidence: 99%