Research Article
Quantitative Visualization Monitoring of Cracks at Shotcrete-Rock Interface Based on Acoustic Emission
Figure 15
Schematic diagram of Tb of HD specimen at different loading stages. (a) 0∼P3 stage. (b) P3∼P5 stage. (c) P5∼P7 stage. (d) P7∼P9 stage. (e) P9∼end stage.
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