Experimental Study on Vibration Reduction Technology of Hole-by-Hole Presplitting Blasting

Table 5

Comparative analysis of blasting vibration by presplit holes simultaneous detonated.

(kg)		(m)	(m)	(cm/s)	(cm/s)	(%)	(%)
510	1#	70.0	1.5	2.97	4.42	32.79%	31.42%
	2#	85.0	11.5	1.53	2.16	29.33%
	3#	110.0	21.5	0.64	0.94	32.16%
455	1#	82.0	1.5	2.64	3.54	25.52%	25.70%
	2#	100.0	11.5	1.30	1.47	11.44%
	3#	123.0	21.5	0.44	0.74	40.14%
443	1#	80.0	1.0	2.75	3.47	20.78%	23.30%
	2#	94.0	11.0	1.29	1.75	26.08%
	3#	110.0	21.0	0.65	0.84	23.05%
410	1#	83.0	1.2	2.75	3.79	27.39%	27.43%
	2#	110.0	11.2	0.91	1.14	19.84%
	3#	135.0	21.2	0.44	0.68	35.05%
345	1#	85.0	0.5	2.96	3.64	18.78%	24.16%
	2#	115.0	10.5	0.87	1.18	26.38%
	3#	140.0	20.5	0.43	0.59	27.32%