Shock and Vibration / 2019 / Article / Fig 5

Research Article

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

Figure 5

Stress evolution during the first excavation in the second stage: (a) the stress-time curve of 4 measuring points; (b) diagram of stress distribution at different locations over time.
(a)
(b)

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