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

Table 2

Single impact at different impact speeds.

No.	(m·s^−1)	(%)		(g·cm^−3)	(m·s^−1)	(MPa)	(s^−1)	Observation
M1	4	3.929	1.032	2.249	1671	23.37	22.15	No damage
M2	5	3.755	1.026	2.253	1808	28.33	29.45	No damage
M3	6	4.026	1.038	2.161	1745	28.70	34.05	No damage
M4	7	4.545	1.031	2.258	1746	27.67	47.46	Damage
M5	8	6.806	1.053	2.226	1543	30.96	54.78	Damage

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