Study on Hydraulic Connection and Seepage Law of Goaf Groups in Coal Mine Underground Reservoir

Figure 6

Permeability distribution curves at different coal pillar widths. (a) Coal pillar width is 10 m. (b) Coal pillar width is 30 m. (c) Coal pillar width is 50 m. (d) Coal pillar width is 70 m.

(a) Coal pillar width is 10 m

(b) Coal pillar width is 30 m

(c) Coal pillar width is 50 m

(d) Coal pillar width is 70 m