Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole

<div>Free swelling ratio of the DE material during hydration with macrographs of the material at the 16th hour and the 168th hour.</div>

Advances in Materials Science and Engineering

Figure 1: Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole 