Study on Response Characteristics of Surrounding Rock Rupture Microseismic Events during Coal Roadway Excavation

Table 3

Statistics of roadway coal burst.

Date	Number	Location	Frequent period	Number
March 1 to 7	152	In front of the working face	March 4, 4 : 11–5 : 46	12
			March 5, 9 : 22–10 : 50	14
			March 10, 22 : 26–23 : 25	16
March 8 to 14	200	In lateral front of the working face	March 10, 1 : 35–4 : 00	14
			March 11, 18 : 43–19 : 34	12
March 15 to 22	65	On one side of the roadway
March 23 to 31	84	In front of the working face and on the roof