Study on Damage Law of Raw Coal Based on Different Characterization Methods

<div>Damage variable curve based on AE characteristics. (a) <i>D</i><sub><i>A</i></sub>(<i>i</i>). (b) <i>D</i><sub><i>A</i></sub>.</div>

Advances in Civil Engineering

Figure 8: Study on Damage Law of Raw Coal Based on Different Characterization Methods 