A Study of Millisecond Blasting on High Bench at Barun Iron Ore Operation

Table 4

Peak effective stress of the inspection points under the millisecond blasting.

Initiation method	Peak effective stress (MPa)
	Initiation location 0 m	0.5 m	1.0 m	1.5 m	Difference between maximum and minimum
3-1	9.37	9.25	9.05	10.36	1.31
3-2	10.02	10.09	14.50	13.23	4.48
4-1	15.80	15.40	15.55	15.46	0.40
4-2	14.38	14.14	14.18	14.45	0.07
Difference between maximum and minimum	6.43	6.15	6.50	5.10	///