Experimental Investigation on the Mechanical Response of Coals to Uniaxial Compression and Low-Speed Dynamic Loading

Table 3

Experimental results of dynamic mechanics of coals.

Coal core	Pressure in air chamber (MPa)	Striker bar speed (m·s^−1)	Strain rate (s^−1)	Compressive strength (MPa)	Ultimate strain	Elasticity modulus (GPa)
A-1	0.05	1.68	273.74	76.0	0.0359	2.71
A-2	0.06	1.99	285.69	122.7	0.0347	16.42
A-3	0.08	2.45	376.90	106.7	0.0461	12.62
B-1	0.05	1.50	217.42	51.6	0.0333	9.27
B-2	0.06	1.97	317.97	89.9	0.0423	9.32
B-3	0.08	2.54	424.05	65.94	0.0601	2.03