Traceability and failure consequences of natural gas explosion accidents based on key investigation technology

Hu, Qianran; Zhang, Qi; Yuan, Mengqi; Qian, Xinming; Li, Mingzhi; Wu, Hao; Shen, Xingyu

doi:10.1016/j.engfailanal.2022.106448

Cited by 22 publications

(4 citation statements)

References 41 publications

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“…In addition, an analysis of the literature related to coal mine accidents revealed that, in recent years, underground coal mining has long been a dangerous occupation, and coal gas outbursts are severe accidents that can occur in coal mines [ 28 ]. There have been frequent gas explosion accidents in China [ 29 ], and coal mine gas accidents account for half of all coal mine accidents [ 30 ]. Duan et al [ 31 ] also find that gas explosions can easily cause a large number of casualties and huge property losses in coal mines.…”

Section: Digital Twin Model Constructionmentioning

confidence: 99%

Research on coal mine safety management based on digital twin

Wang

Huang²,

Li³

et al. 2023

Heliyon

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Section: Digital Twin Model Constructionmentioning

confidence: 99%

Research on coal mine safety management based on digital twin

Wang

Huang²,

Li³

et al. 2023

Heliyon

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“…In the traditional design and construction process of buildings, blast loads are ignored. For important buildings, blast resistance design should be conducted to prevent accidental explosions and violent terrorist attacks [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Factors Influencing the Blast Resistance of Reinforced Concrete Columns Based on Grey Relation Degree

Xie

2023

Sustainability

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Reinforced concrete (RC) column is an important load-bearing component in building structures. In order to study the blast resistance of RC columns, the numerical simulation model was verified based on the field test data, and the ANSYS/LS-DYNA 2020R2 software was used to expand the working conditions. The sensitivity analysis method of grey relation degree was used to study the effects of factors, such as the diameter of longitudinal reinforcement, number of longitudinal reinforcement, the diameter of the stirrup, stirrup spacing, strength of concrete, scale distance, and strength of reinforcement on the blast resistance of RC columns. The results show that changing the number of longitudinal reinforcements to control the reinforcement ratio can make the peak displacement of RC columns smaller rather than changing the diameter of longitudinal reinforcement. Changing the stirrup spacing to control the stirrup ratio can make the RC column have better blast resistance rather than changing the diameter of the stirrup. The strength of reinforcements and concrete materials has little effect on the mid-span peak displacement of RC columns. The grey relation degree of the influencing factors of the mid-span peak displacement of the RC column is in the order of stirrup spacing, the diameter of the stirrup, scale distance, the diameter of longitudinal reinforcement, the number of longitudinal reinforcement, and the strength of concrete. The relation between stirrup spacing and the diameter of the stirrup is larger, and the grey relation degree is 0.6914 and 0.6660, respectively. This study can provide a reference for the design and construction of RC column structures.

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“…Premixed methane–air is potentially dangerous in industries such as natural gas transmission, coal mining, and plant operations and can cause significant harm to personnel and production equipment. − When the premixed gas explodes in a space with complex structure, the complex structure interacts with the gas flow generated by the explosion to generate a vortex. The vortex structure leads to serious wrinkles on the flame front, increasing the flame surface area.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

Deng

Wen

et al. 2023

ACS Omega

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The combustion characteristics of premixed methane−air flames in a half-open tube with a two-sided 45°branch structure at different ignition positions were investigated by experiments and large eddy simulations. The numerical results were compared with the experimental results to verify the correctness of the model. The results show that the simulation results are highly consistent with the experiment. This study provides a basic understanding of the effects of the branch tube structure and the ignition position on flame dynamics. When the flame propagates to the branch interface, it forms a symmetrical vortex structure at the branch tube with the opposite rotation direction. When the ignition position is at IP0 and IP900, the maximum overpressures obtained in the experiment are 10.1 and 10.7 kPa, respectively, and 9.2 and 10.4 kPa in the simulation, respectively. At IP0, the Karlovitz number indicating the interaction intensity between the flame surface and the turbulence during flame propagation is a maximum of 9.2 and a minimum of 0.04. The premixed flame has a folded small flame, a corrugated small flame, and a thin reaction zone.

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Traceability and failure consequences of natural gas explosion accidents based on key investigation technology

Cited by 22 publications

References 41 publications

Research on coal mine safety management based on digital twin

Research on coal mine safety management based on digital twin

Sensitivity Analysis of Factors Influencing the Blast Resistance of Reinforced Concrete Columns Based on Grey Relation Degree

Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

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