Study on the Permeability Evolution and Its Formation Mechanism of Xiaojihan Aquifer Coal Seam under Plastic Flow

Figure 4

The experiment results of mercury intrusion tests of the water-bearing coal seam and no-water coal seam. Note: (a) C1, C2, C3, C4, and C5 denote porosity, total amount of mercury, permeability, total pore area, and average pore size, respectively. (b) The ordinate indicates the proportion of the two coal seams under the same parameter.