Investigation and CFD simulation of coal dust explosion accident in confined space: A case study of Gaohe Coal Mine Ventilation Air Methane oxidation power plant

A large amount of coal dust is produced in coal mine excavation, which has a serious impact on the working environment and health of underground workers. To address this problem, the spatial and temporal evolution process of coal dust in the excavation tunnel is analyzed via numerical simulation, and an ultrafine water mist partition multistage dust suppression system is developed. The results show that in the original ventilation mode, the air velocity within 5 m from the workface varies greatly, up to 17 m/s. When the airflow impacts the workface, it shifts to the return air side and gradually stabilizes below 2 m/s. Driven by airflow, coal dust gathers around the tunneling machine and diffuses to the rear of the tunnel, the speed increases first and then decreases, and the whole tunnel is filled in 40 s. Within 10 s, the water mist particles cover the whole tunnel at a high speed, capture and settle the coal dust particles, and prevent the further spread of coal dust. After application to the I030409 excavation workface in the Qipanjing Coal Mine, the average reduction efficiency for total dust and respirable dust in the tunnel reached 91.74% and 93.4%, respectively. Therefore, the system successfully achieves partitioning multilevel dust reduction.

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Application of Virtual Reality Technology in Enhancing the Teaching Effectiveness of Coal Mine Disaster Prevention

Li,

Song,

Liu

et al. 2024

Sustainability

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Coal mine disaster prevention is a fundamental course within mining engineering and coal mine safety engineering curricula. Given the complexity and variability of coal mine disasters, it is crucial to cultivate students’ practical awareness to address the challenges encountered in this field. Virtual reality (VR) technology, with its highly realistic and reusable virtual environments, reduces the resource consumption required for on-site training. Additionally, it offers an effective solution for students to safely and efficiently understand coal mine disasters, master the common types of disasters and their causes, and enhance immersive learning, practical skills, and emergency response capabilities. This study integrates virtual simulation experiments with course content and utilizes VR technology to simulate mine environments and disaster processes, which allows students to experience disaster events in a safe virtual setting. By incorporating embodied cognition theory and VR gesture technology, an interactive learning system is developed to improve students’ learning efficiency and engagement. The results indicate that applying VR technology to teaching coal mine disaster prevention and control significantly stimulates students’ interest and facilitates a comprehensive, intuitive understanding of the causes, characteristics, and prevention measures associated with coal mine disasters. Employing virtual reality technology in education not only enhances the students’ awareness of coal mine safety but also provides strong support for the sustainable development of coal mine enterprises.

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Investigation and CFD simulation of coal dust explosion accident in confined space: A case study of Gaohe Coal Mine Ventilation Air Methane oxidation power plant

Cited by 3 publications

References 43 publications

Study on the separation efficiency of sheath flow respirable dust virtual impact separator under the influence of multiple parameters

Study on the separation efficiency of sheath flow respirable dust virtual impact separator under the influence of multiple parameters

Research on an Ultrafine Water Mist Partition Multistage Dust Suppression System in Underground Excavation Tunnel

Application of Virtual Reality Technology in Enhancing the Teaching Effectiveness of Coal Mine Disaster Prevention

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