Mechanical Properties of Bump-Prone Coal with Different Porosities and Its Acoustic Emission-Charge Induction Characteristics under Uniaxial Compression

<div>Charge induction waveforms in the time domain and the frequency distribution recorded for the tests at the signal surge point of coal: (a) time domain and (b) frequency. a is specimen 18<sup>#</sup>, b is specimen 10<sup>#</sup>, and c is specimen 5<sup>#</sup>.</div>

Advances in Civil Engineering

fig17

Figure 17

Figure 17: Mechanical Properties of Bump-Prone Coal with Different Porosities and Its Acoustic Emission-Charge Induction Characteristics under Uniaxial Compression 

Figure 17 | Mechanical Properties of Bump-Prone Coal with Different Porosities and Its Acoustic Emission-Charge Induction Characteristics under Uniaxial Compression 