Mining-Induced Pressure-Relief Mechanism of Coal-Rock Mass for Different Protective Layer Mining Modes

Figure 10

Stress-strain curves under different protective layer mining modes. (a) Initial confining pressure of 15 MPa for soft rock protective layer mining. (b) Initial confining pressure of 15 MPa for coal seam protective layer mining. (c) Initial confining pressure of 20 MPa for soft rock protective layer mining. (d) Initial confining pressure of 25 MPa for soft rock protective layer mining. (e) Initial confining pressure of 25 MPa for coal seam protective layer mining.

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