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

<div>Stress-strain-permeability changes of raw coal at different confining pressures. (a) Stress-strain-permeability changes of raw coal at different confining pressures (gas pressure = 1 MPa). (b) Stress-strain-permeability changes of raw coal at different confining pressures (gas pressure = 2 MPa). (c) Stress-strain-permeability changes of raw coal at different confining pressures (gas pressure = 3 MPa).</div>

Advances in Materials Science and Engineering

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Figure 4

Figure 4: Experimental Study on the Deformation and Permeability Characteristics of Raw Coal under the Coupling Effect of Confining Pressure and Pore Pressure 

Figure 4 | Experimental Study on the Deformation and Permeability Characteristics of Raw Coal under the Coupling Effect of Confining Pressure and Pore Pressure 