Micromechanical Properties of Different Rank Coal and Their Impact on Fracture Compressibility
Yang Zhao,
Ting Liu,
Baiquan Lin
Abstract:The
micromechanical properties are crucial factors influencing
coal fracturing and efficient gas extraction. This paper employs nanoindentation
techniques to investigate coal micromechanical properties across various
ranks, analyzing their impact on fracture compressibility. The results
indicate significant variations in the distribution of micromechanical
parameters of lignite, exhibiting the strongest heterogeneity. Average
contact depth and creep displacement follow the order lignite >
bituminous
coal > ant… Show more
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