Experimental study and evaluation of remoulded coal samples based on mechanics and permeability characteristics

Some coal seams have loose textures and developed beddings, so it is difficult to obtain samples to study their mechanics and permeability characteristics. However, it is possible to carry out related research by using remoulded coal instead of raw coal. With polyvinyl acetate emulsion as a binder,...

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Bibliographic Details
Published in:Arabian journal of geosciences 2021, Vol.14 (1), Article 23
Main Authors: Liu, Jia, Qin, Yueping
Format: Article
Language:English
Subjects:
Acetates
Acetic acid
Binders (materials)
Coal
Drying
Earth and Environmental Science
Earth science
Earth Sciences
Emulsions
Experimental research
Laboratory experimentation
Mechanics
Mechanics (physics)
Original Paper
Permeability
Temperature
Water temperature
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Summary:Some coal seams have loose textures and developed beddings, so it is difficult to obtain samples to study their mechanics and permeability characteristics. However, it is possible to carry out related research by using remoulded coal instead of raw coal. With polyvinyl acetate emulsion as a binder, remoulded coals were obtained by different preparation processes and quantified using the cosine similarity method. The results show that remoulded coals, which were prepared with a 10% binder concentration, 50 °C drying temperature, 1:1 water-binder ratio and 60-MPa forming pressure, are similar to the raw coal in this case. Changing the binder concentration, drying temperature, water-binder ratio and forming pressure can improve the mechanics and permeability characteristics of remoulded coals, which informs related experimental research.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-020-06261-2