The fractal dimensions of the fractures in coal also exhibited an increasing trend as the coal-body structure became fragmented, indicating that the fracture structure inside the coal samples could also be altered by stress action. 3.3 Permeability Characteristics We conducted experimental research on permeability under full stress and strain for two primary structured coal samples.
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Characteristics of Pores and Fractures in Primary-Fragmented Structured Coal and the Associated Influence Mechanism on Permeability.
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