Blasting-Induced Permeability Enhancement of Ore Deposits Associated with Low-Permeability Weakly Weathered Granites Based on the Split Hopkinson Pressure Bar

Table 3

Constant-velocity cyclic impact test data.

No.	(m·s^−1)	(%)		(g·cm^−3)	(m·s^−1)	(MPa)	(s^−1)
N-1-1	6	2.867	1.030	2.335	1794	29.78	37.97	6
N-1-2		3.220	1.032	2.295	1745	38.50	42.21	8
N-1-3		1.876	1.005	2.510	2083	43.89	39.82	7
N-1-4		2.854	1.021	2.328	1903	44.67	30.20	6
N-2-1	5	4.688	1.037	2.198	1663	36.26	24.70	9
N-2-2		2.173	1.020	2.392	1923	48.41	24.33	10
N-2-3		1.764	1.021	2.571	2113	57.50	27.92	14
N-2-4		3.604	1.029	2.296	1773	21.77	20.56	12
N-3-1	4	3.194	1.017	2.285	1879	31.76	19.46	15
N-3-2		1.834	1.030	2.428	1970	38.68	18.16	19
N-3-3		3.199	1.022	2.284	1842	36.80	16.50	16
N-3-4		3.359	1.037	2.288	1786	27.98	18.39	11

Remarks: is the approximate impact velocity, is the initial porosity, is the slenderness ratio, is the density, is the longitudinal wave velocity, is the first impact dynamic compressive strengths, is the first impact average strain rate, and is the cumulative impact.