Experimental Study on Energy Dissipation of Saturated Mudstone in Coal Mine under Impact Loading

Table 3

Results of energy dissipation of mudstone under different impact loadings.

Number	Drive pressure (MPa)	Scale		Impedance (10^5 g/(cm^2 s))	Incident energy (J)	Transmitted energy (J)	Reflected energy (J)	Absorbed energy (J)	Energy dissipation density (J·cm^-3)	Average strain ratio (s^-1)	Dynamic compressive strength (MPa)	Peak strain
		Diameter (mm)	Length (mm)
1	0.25	49.83	26.19	4.91	54.94	28.14	7.64	19.16	0.375	45	57.50	0.0099
2	0.25	49.95	26.11	5.59	52.53	26.19	12.93	13.44	0.262	47	56.65	0.0111
3	0.25	50.05	24.08	5.76	50.53	23.17	7.77	19.59	0.414	42	52.50	0.0117
4	0.3	49.64	25.56	4.40	60.37	30.01	9.88	20.48	0.414	53	55.32	0.0138
5	0.3	50.05	25.30	4.55	68.19	36.70	7.96	23.53	0.473	62	62.30	0.0103
6	0.3	49.88	26.76	5.16	61.80	33.7	7.10	21.00	0.404	60	62.13	0.0098
7	0.4	50.04	26.06	5.49	103.15	42.43	17.64	43.09	0.841	71	64.34	0.015
8	0.4	49.97	26.65	4.29	96.35	38.57	14.50	43.24	0.828	66	67.69	0.016
9	0.4	49.74	25.78	5.30	105.51	40.20	16.59	48.72	0.973	70	63.57	0.0212