Mechanical properties and micro characterization of coal slime water-based cementitious material-gangue filling: A novel method for co-treatment of mining waste

Shen, Lingling; Lai, Wanan; Zhang, Jixiong; Sun, Zhihui; Li, Meng; Zhou, Nan

doi:10.1016/j.conbuildmat.2023.133747

Cited by 7 publications

(1 citation statement)

References 45 publications

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“…The state and the government have long been clearly required to improve the comprehensive utilization rate of coal gangue, but at present, they still mainly rely on the ground piling up or landfills. The problem of coal gangue disposal has gradually become a constraint on China's efficient development of mineral resources [9][10][11], and an ecological environmental protection strategy is one of the obstacles [12][13][14][15]. How to efficiently, greenly, scientifically, and safely dispose of solid wastes such as coal gangue will inevitably become the key to the realization of an ecological environment and the economic and social development of high quality in the field of coal [16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Study on Ultra-Long-Distance Transportable Concentration Gradient of Coal Gangue Slurry with Different Gradations

Wang,

Yu,

et al. 2024

Minerals

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Coal gangue, the primary solid waste generated during the coal mining process, is typically disposed of on the surface, where it gradually accumulates to form gangue piles that significantly contaminate the surrounding environment. Filling technology has been widely employed for the safe and efficient disposal of coal gangue due to its sustainability, safety, and efficiency. However, there is still a lack of theoretical research on the concentration of gangue slurry in long-distance filling pipeline transportation. Therefore, a calculation model of the ultra-long-distance transportable concentration of coal gangue slurry with different grades was constructed based on the static anti-segregation performance and Bingham model. In addition, the relevant parameters of the calculation model of the ultra-long-distance transportable concentration of coal gangue slurry in this mine were determined using the 8 km pipeline transport of coal gangue slurry in one mine as the technical background. It was subsequently demonstrated that the yield stress, plastic viscosity, and mass concentration of the various grades of gangue slurry in this mine exhibit an increasing exponential function, while the slurry density and mass concentration exhibit an increasing linear function, and the mass concentration and actual flow rate correspond to a quadratic polynomial increment. Finally, the minimum and maximum concentrations for different grades of gangue slurry that can be transported over long distances in this mine were determined. This work provides theoretical and practical guidance on how to select the concentration of gangue slurry for long-distance pipeline transport.

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