Experimental Study on Stress Evolution and Microseismic Signals under Vibration Conditions of Coal during Excavation and Subsequent Waiting Time

<div>Original microseismic signals and denoised signals collected in the experiment: (a) signal before denoising during excavation; (b) denoised signal during excavation; (c) signal spectrum before denoising during excavation; (d) denoised signal spectrum during excavation; (e) original signal during waiting time; (f) signal after denoising during waiting time.</div>

Shock and Vibration

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Figure 11

Figure 11: Experimental Study on Stress Evolution and Microseismic Signals under Vibration Conditions of Coal during Excavation and Subsequent Waiting Time 

Figure 11 | Experimental Study on Stress Evolution and Microseismic Signals under Vibration Conditions of Coal during Excavation and Subsequent Waiting Time 