Research Article
Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole
Figure 11
Distribution of the plastic region around the borehole. (a) No active support, 1d. (b) No active support, 2d. (c) No active support, 5d. (d) Active support, S1-1d. (e) Active support, S1-2d. (f) Active support, S1-5d.
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