Experiments on Mechanical Response and Energy Dissipation Behavior of Rockburst-Prone Coal Samples Under Impact Loading

Table 2

Variation of strain rate under different pressures.

Sampling location	Numbering	Average length (mm)	Diameter (mm)	Average nitrogen pressure (MPa)	Average incident velocity (m/s)
Xinzhouyaocoal mine (rockburst-prone)	X-1	50.00	50	0.200	6.31
	X-2	50.15	50	0.225	8.07
	X-3	50.20	50	0.250	8.71
	X-4	50.00	50	0.275	9.72
	X-5	49.85	50	0.300	10.81
	X-6	50.10	50	0.325	11.64
Machangcoal mine (rockburst none-prone)	Y-1	50.12	50	0.200	6.39
	Y-2	51.05	50	0.225	7.97
	Y-3	50.10	50	0.250	8.77
	Y-4	50.13	50	0.275	9.75
	Y-5	49.60	50	0.300	10.87
	Y-6	50.00	50	0.325	11.70