Research Article

Coupling Analysis of Water Injection Softening-Precursor Information Prediction of Coal-Rock Mass Based on Energy Conduction

Figure 4

The whole evolution of “true energy” acoustic emission of coal samples under different conditions.
(a) Whole evolution of “true energy” acoustic emission of coal samples under dry state
(b) Whole evolution of “true energy” acoustic emission of coal samples under natural state
(c) Whole evolution of “true energy” acoustic emission of coal samples under saturated state