Key Strata Inducing Dynamic Disasters Based on Energy Condition: Criterion and Application

Table 1

Criterion results of KDIS in Yangliu Coal Mine.

No.	#1	#2	#3	#4
Lithology	Sandstone	Siltstone	Sandstone	Igneous rock
Thickness (m)	4.8	11.5	9.3	43.6
Distance from coal seam #10 (m)	12	21	72	102
Extreme hanging length (m)	16.7	20.0	18.7	184.6
Released energy (MJ)	0.31	0.63	0.48	41.10
Residual energy spreading to coal seam #10 (kJ)	1.55	1.62	0.28	15.98
DIC	0.155	0.162	0.028	1.598
Criterion result	WDIS	WDIS	NDIS	KDIS