Applied Research of Water Jet Technology in Preventing Rock Burst Occurred in Roadways

Table 3

The parameters of elastic energy index () under different states.

State	Number	Height/mm	Diameter/mm	Cross s section area/mm^2	Elastic energy index	Mean elastic energy index
Natural state	NS4	102	50	1962.5	10.4	9.4
	NS5	100	50	1962.5	8.7
	NS6	96	50	1962.5	9.0
Saturated water state	SWS4	97	50	1962.5	3.2	3.7
	SWS5	99	50	1962.5	4.5
	SWS6	99	50	1962.5	3.4