The Scientific World Journal / 2014 / Article / Fig 1

Research Article

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

Figure 1

Hand specimen 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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(a)
560450.fig.001b
(b)
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(c)
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(d)