A Study of Rockburst Hazard Evaluation Method in Coal Mine

Table 4

Statistics of previous rockburst in Junde coal mine.

RDE	AEC	REC	/J	/MJ		/m	Coefficient of stress concentration “”
5.09	5.00	2.54	220000	60	0.74	30.00	2.00
4.56	5.00	2.28	126000	60	0.67	40.00	2.00
3.22	5.00	1.61	36700	30	0.61	50.00	1.50
9.27	5.00	4.64	936000	30	0.67	40.00	1.50
6.72	5.00	3.36	578000	60	0.70	35.00	2.00
4.28	5.00	2.14	63600	60	0.67	40.00	2.00