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

<div>Schematic for the morphology model of hydrates in the DE material: (a) initial swelling stage; (b) secondary swelling stage.</div>

Advances in Materials Science and Engineering

Figure 7: Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole 