In-situ Measurement and Simulation by CFD of Methane Gas Distribution at a Heading Faces.

政友, 一ノ瀬; Masatomo, Ichinose; Nakayama, Shinsuke; 伸介, 中山; Uchino, Kenji; 健一, 内野; 雅弘, 井上; Inoue, M.

doi:10.2473/shigentosozai.114.769

Cited by 13 publications

(2 citation statements)

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“…Because of the complex engineering geological conditions and hydrogeological conditions in southwest China, the full-face tunneling method can no longer meet the requirements of tunnel construction in this region, and the relevant research work on ventilation problems in other construction methods is relatively insufficient [19][20][21]. e difference in space structure at the tunnel face caused by different construction methods makes it more difficult to predict the diffusion process and distribution characteristics of harmful gas [22,23]. Due to the complexity of ventilation problems, the existing ventilation experience of a singlehead tunnel with full section drilling and blasting excavation cannot meet the ventilation requirements of other construction methods.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Effect of Forced Ventilation in Tunnel under Single-Head Drilling and Blasting

Luo

Huang

et al. 2020

Shock and Vibration

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Based on the excavation of Yuelongmen tunnel on ChengLan Railway in China, this paper will probe into the forced ventilation effect of harmful gas generated by drilling and blasting construction, simulate the diffusion process of harmful gas generated during blasting operation on the tunnel face by establishing the finite element model of gas turbulent flow and concentration diffusion in the tunnel, and study the spatial-temporal evolution law of CO concentration field under different air pipe layout locations and tunnel excavation methods. The results show that, compared with corner layout, haunch layout, and central layout, the ventilation effect is the best when the air pipes are arranged near the wall at the tunnel vault, and the CO concentration can be reduced to the concentration limit after 588 s of ventilation; compared with the full-face tunneling method and the lower pilot heading method, the benching tunneling method can effectively reduce the retention time of CO near the tunnel face, and the CO concentration on the tunnel face can be reduced to the standard limit after 326 s of ventilation near the wall of tunnel vault.

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Section: Introductionmentioning

confidence: 99%

Simulation Study on the Effect of Forced Ventilation in Tunnel under Single-Head Drilling and Blasting

Luo

Huang

et al. 2020

Shock and Vibration

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“…Since the 1980s, scholars at home and abroad have carried out a lot of experimental research on the air flow state of driving face. Internationally, Nakayama and other scholars in Japan have obtained the distribution of air flow in the driving tunnel by using the method of laboratory measurement, and Ichinose Masatomo and other scholars have analyzed the gas distribution in the driving tunnel by using the method of field measurement in Japan [3]. Rao, an Australian scholar, used the method of hydrodynamics to simulate the flow state of the air flow in the working face and combined with the research results to discuss the dust reduction effect [4].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effective Range of Local Ventilation in the Driving Face of Single Head Roadway

Hao¹,

Wang²

2020

WJET

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The traditional research considers that the effective range of forced local ventilation in single head tunnel is the horizontal distance from the jet exit section to the rotary section, but there is a low wind speed area at the end of the range which can not completely and effectively release toxic and harmful gases. In this area, due to the small jet energy, there is no way to effectively remove the toxic and harmful gases produced in the driving process, which seriously affects the safety of the mine. Therefore, the reasonable definition of the effective range of the forced local ventilation of the single head tunnel can not only improve the theory of the local ventilation of the mine, but also prevent the accumulation of gas and ensure the life safety of the employees. In this paper, the definition of effective range of local ventilation in single head heading face is put forward, and the rationality of the definition of effective range is verified by numerical simulation. On the basis of reasonable definition of effective range, the relationship between wind speed and effective range under different ventilation modes is studied by numerical simulation. The results show that when the wind speed at the outlet of the air duct is less than 20 m/s, the effective range changes rapidly with the outlet wind speed, and after more than 20 m/s, the effect of wind speed on the effective range is gradually weakened. Under the same exit wind speed, the effective range of parallel and coplanar air inlet is much greater than that of single air inlet.

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Simulation of construction ventilation in deep diversion tunnels using Euler–Lagrange method

et al. 2014

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In-situ Measurement and Simulation by CFD of Methane Gas Distribution at a Heading Faces.

Cited by 13 publications

References 0 publications

Simulation Study on the Effect of Forced Ventilation in Tunnel under Single-Head Drilling and Blasting

Simulation Study on the Effect of Forced Ventilation in Tunnel under Single-Head Drilling and Blasting

Study on the Effective Range of Local Ventilation in the Driving Face of Single Head Roadway

Simulation of construction ventilation in deep diversion tunnels using Euler–Lagrange method

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