A Study of the Differences in the Gas Diffusion and Migration Characteristics of Soft and Hard Coal in High Gas Coal Seams

<div>Gas desorption laws of the soft coal and hard coal. (a) Gas desorption speeds of the soft coal and hard coal. (b) Gas desorption capacities of the soft coal and hard coal.</div>

Advances in Civil Engineering

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Figure 10

Figure 10: A Study of the Differences in the Gas Diffusion and Migration Characteristics of Soft and Hard Coal in High Gas Coal Seams 