Prevention and suppression of coal dust explosion in underground coal mines: Role of rock dust type, particle size, proportion, concentration, and thermal properties

Sahu, Aashish; Prasad Mishra, Devi

doi:10.1016/j.apt.2024.104343

Cited by 11 publications

(1 citation statement)

References 52 publications

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“…Coal resources play an irreplaceable role in the Chinese economy, supporting social production and driving the development of the national economy [1][2][3]. However, safety hazards in coal mining, especially coal dust safety issues, involving occupational hazards [4][5][6], explosion hazards [7][8][9], environmental pollution [10][11][12], and mechanical equipment damage [13][14][15], have become a major challenge that urgently needs to be addressed. The "Healthy China" initiative emphasizes public safety systems and the development of occupational health [16,17].…”

Section: Introductionmentioning

confidence: 99%

Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

Liu,

Li,

Ling

et al. 2024

Processes

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Coal dust is a major safety hazard in the process of coal mining and is of great importance to ensure production safety and maintain the health of operators. In order to understand the microscopic mechanism during coal seam water injection and reveal the mechanism of surfactants in improving the wettability of coal dust, coking coal was selected as the research object. Three surfactants, SDBS, AEO-9, and CAB-35, were chosen for molecular dynamics simulation research on the wetting and adsorption properties of water/coal/surfactants. The results show that surfactant molecules can cover the hydrophobic groups on the surface of coking coal, forming a hydrophilic adsorption layer, changing the coal surface from hydrophobic to hydrophilic, and enhancing the wettability. After adding surfactants, the thickness of the adsorption layer in the z-axis direction increases, expanding the contact area between coking coal and water molecules, thereby improving the wettability. When surfactants tightly cover the surface of coking coal, their binding strength increases, forming a more stable hydrophilic layer and further improving the wettability. At the same time, surfactants promote the diffusion of water molecules and enhance the interaction between hydrophobic alkyl chains and water molecules, further enhancing the wetting effect.

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