Shock and Vibration / 2019 / Article / Fig 3

Research Article

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

Figure 3

Schematic diagram of the excavation scheme. Note. are the excavation speeds; is the time before excavation; is the time of each excavation; is the waiting time of the excavation shift; and is the waiting time of the overhaul shift.

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