Experimental Study on the Deformation and Permeability Characteristics of Raw Coal under the Coupling Effect of Confining Pressure and Pore Pressure

<div>Peak strength change curves of raw coal at different confining pressures and gas pressures. (a) Curves of strength changing with confining pressure. (b) Curves of strength changing with gas pressure.</div>

Advances in Materials Science and Engineering

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Figure 6

Figure 6: Experimental Study on the Deformation and Permeability Characteristics of Raw Coal under the Coupling Effect of Confining Pressure and Pore Pressure 

Figure 6 | Experimental Study on the Deformation and Permeability Characteristics of Raw Coal under the Coupling Effect of Confining Pressure and Pore Pressure 