Study on Dynamic Evolution Law of Blasting Cracks in Elliptical Bipolar Linear Shaped Charge Blasting

Table 4

Main crack length of different hole diameter blasting.

Blast hole diameter	42 mm (cm)	50 mm (cm)	60 mm (cm)	70 mm (cm)	80 mm (cm)	90 mm (cm)	100 mm (cm)
Left main crack length	49.27	54.43	60.17	65.21	67.14	65.54	62.16
Right main crack length	49.27	57.40	62.16	65.32	67.44	65.64	63.16