Influence of Cyclic Impact Loading and Axial Stress on Dynamic Mechanical Properties of Burst-Prone Coal

Figure 5

The dynamic stress-strain curves of coal under different axial stresses and cyclic impacts: (a) axial stress is 8 MPa, no. XZY1-2; (b) axial stress is 5 MPa, no. XZY2-1; and (c) axial stress is 2 MPa, no. XZY3-3, for the Zhaogezhuang burst-resistant coal specimen; (d) axial stress is 8 MPa, no. YJ1-1; (e) axial stress is 5 MPa, no. YJ2-3; and (f) axial stress is 2 MPa, no. YJ2-3, for the Qianqiu burst-prone coal specimen.

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