Research Article

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

Figure 7

Diagram of the relationships between the increments of the pore sizes and the specific surface areas and the increments of pore volumes of the hard coal of the No. 11 coal seam. (a) Relationships between the increments of the pore sizes and the specific surface areas. (b) Relationships between the increments of the pore sizes and the pore volumes; (A) is 10−1 nm.
(a)
(b)