Experimental Investigations on Crack Propagation Characteristics of Granite Rectangle Plate with a Crack (GRPC) under Different Blast Loading Rates

Table 2

Charge parameters.

Test no.	Charge length (mm)	Charge diameter (mm)	Charge weight (g)	Density of PETN (g/cm^3)	Detonation velocity (m/s) [28]
1	80	5.5	1.51	0.7949	4762.13
2	80	6.0	1.98	0.8758	5061.46
3	80	6.5	2.42	0.9121	5195.77

According to reference [28], detonation velocity (km/s) = 3.19 + 3.7 Density of PETN (g/cm³)−0.37.