Characterization of Coal Porosity for Naturally Tectonically Stressed Coals in Huaibei Coal Field, China

Figure 2

SEM images of deformed coal, (a) weak brittle deformed coal (Y04); (b) strong brittle deformed coal (H12); (c) weak ductile deformed coal (L04); (d) strong ductile deformed coal (H09).

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(b)

(c)

(d)