Dust pollution during shotcrete process in high-altitude tunnel based on numerical simulation

Liu, Cong; Jiang, Zhongan; Zhang, Guoliang; Feng, Xue; Zeng, Fabin

doi:10.1016/j.partic.2022.05.012

Cited by 19 publications

(4 citation statements)

References 38 publications

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“…With an aging population and increasing labor costs, there is a growing need for more efficient, less labor-intensive construction methods. Electric muck transfer equipment offers a solution to these challenges, providing a cleaner, safer, and more sustainable alternative to traditional diesel-powered machinery 25 . While acknowledging the significant strides made in electric vehicle technology and infrastructure, it's crucial to place electric construction equipment within a context that considers multiple alternatives, including hybrid and hydrogen fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Application and configuration analysis of electric muck transfer equipment in plateau railway tunnel: a case study in southwest China

Yang,

Liu,

Liu

et al. 2024

Sci Rep

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The burgeoning development of railway construction in plateau regions of southwest China necessitates innovative and environmentally sustainable approaches, particularly in the realm of tunnel construction, where the transfer of muck poses significant operational and environmental challenges. This research, pivoting around the application and configuration of electric muck transfer equipment in plateau railway tunnels, seeks to dissect the potentialities and impediments of transitioning from conventional diesel-powered machinery to electric alternatives, with a spotlight on mitigating environmental impacts and enhancing operational efficiency. Through an analytical lens, the study employs a case study methodology, leveraging data and insights from existing electric equipment models and their applications, provided by major manufacturers in China, to weave a comprehensive narrative around the practicalities, specifications, and challenges embedded in the adoption of electric machinery in plateau environments. The findings unveil a nuanced landscape, where the environmental and operational advantages of electric equipment are juxtaposed against a backdrop of technological, financial, and infrastructural hurdles, thereby crafting a complex tapestry of opportunities and challenges. The research further extrapolates policy recommendations and practical guidelines, advocating for a harmonized amalgamation of governmental policies, technological advancements, and strategic planning to navigate through the identified challenges and optimize the integration of electric equipment in tunnel construction practices. Envisaging future research pathways, the study underscores the criticality of perpetuating technological innovations, policy adaptations, and interdisciplinary research to further refine and enhance the application of electric muck transfer equipment in plateau railway tunnel projects, thereby contributing to the broader narrative of sustainable construction practices in challenging terrains.

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Section: Introductionmentioning

confidence: 99%

Application and configuration analysis of electric muck transfer equipment in plateau railway tunnel: a case study in southwest China

Yang,

Liu,

Liu

et al. 2024

Sci Rep

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“…Since the 1980s, some researchers have begun to carry out experimental research on the distribution of air flow in fully mechanized heading face [31][32][33] . At present, with the development of computer technology, computational fluid dynamics simulation of roadway airflow and the distribution of dust particles has been widely used 20,34,35 .…”

Section: Numerical Simulation Study On Dust Control Of Conical Divers...mentioning

confidence: 99%

Research on dust control technology and numerical simulation of conical guiding air curtain in fully mechanized excavation face

Meng,

Gao,

et al. 2024

Sci Rep

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The dust pollution caused by the operation of fully mechanized heading face poses a serious threat to the safety production of operators and working face. To reduce dust concentration at the fully mechanized heading face, this study analyzed dust samples collected from various positions to understand the particle size distribution characteristics. Based on these findings, a conical diversion air conditioning (CDAC) device was designed to create a radial air curtain for dust control in the roadway cross-section. Computational Fluid Dynamics (CFD) was then employed to investigate the airflow and particle dynamics when the cone-shaped deflector was in closed and open states. The results show that in the fully mechanized heading face, the dust distribution in the working area of the roadheader driver is relatively dense, and the dust particles with particle size ≤ 8 μm account for a large proportion. When the CDAC device is deployed, the axial airflow in the roadway is changed into a rotating airflow along the roadway wall, and an air screen is established in the working area of the roadheader driver to block the outward diffusion of dust. When the pressure air outlet is arranged 30 m away from the tunneling head, the pressure air volume is set to 400 m3/min, and the CDAC device can better form the air curtain barrier to block the dust particles. It provides a new method for effectively controlling the dust concentration of the fully mechanized heading face and directly ensuring the health of the roadheader driver.

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“…Since the heading face involves drilling, blasting and other operations that generate a lot of dust, auxiliary ventilation is necessary and mixed ventilation is used more. For example, Li et al [22] used computational fluid dynamics to investigate the diffusion and transport of dust under different conditions and applied grey correlation analysis to investigate the correlation values of the factors influencing dust diffusion in the shotcrete working area, concluding that the dust concentration in the tunnel decreases, the diffusion distance becomes smaller and the proportion of dust particles settling increases in a high-altitude environment. Chang et al [23] analyzed the air flow characteristics and DPM concentration distribution in the heading face and validated the simulation results using field measurement data, concluding that longer duct lengths in the existing ventilation system have better DPM dilution performance.…”

Section: Introductionmentioning

confidence: 99%

Optimization of controlled circulating ventilation and oxygen supply scheme for high-altitude mine heading face based on CFD

Zhang¹,

Wang²,

Zhang³

et al. 2023

3rd International Conference on Applied Mathematics, Modelling, and Intelligent Computing (CAMMIC 2023)

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With the depletion of mineral resources in the plains, Chinese mining industry has shifted to higher altitudes where low pressure and low oxygen has become a bottleneck limiting further development of mining technology. The traditional diffusion type of oxygen supply has low oxygen utilization. Controlled circulation ventilation offers a good alternative for oxygen supply to workers in high altitude mines. In this study, a CFD approach was used to conduct a single factor analysis of circulating duct height, distance between circulating duct outlet and heading face, oxygen supply duct height, forcing duct air velocity and circulating duct air velocity to investigate their effects on the oxygen mass fraction located at the heading face. In addition, an orthogonal experiment was designed to analyze the effect of the above five factors on the distribution of oxygen mass fraction in the heading face. The results showed that the effect of forcing duct air velocity on the oxygen mass fraction in the heading face was the greatest. The average oxygen mass fraction in the heading face is highest when the height of circulating duct was 0.9 m, the distance between circulating duct outlet and heading face was 2 m, the height of oxygen supply duct was 1.0 m, the air velocity of forcing duct was 3 m/s and the air velocity of circulating duct was 2.5 m/s.

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Dust pollution during shotcrete process in high-altitude tunnel based on numerical simulation

Cited by 19 publications

References 38 publications

Application and configuration analysis of electric muck transfer equipment in plateau railway tunnel: a case study in southwest China

Application and configuration analysis of electric muck transfer equipment in plateau railway tunnel: a case study in southwest China

Research on dust control technology and numerical simulation of conical guiding air curtain in fully mechanized excavation face

Optimization of controlled circulating ventilation and oxygen supply scheme for high-altitude mine heading face based on CFD

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