Design Method for Specific Charge in Deep Mining considering Influence of In Situ Stress

Table 5

Comparison of explosives at Hongtoushan Copper Mine.

Blasting zone	Explosives saved (kg)	Percentage reduction of explosives (%)	Theoretical correction coefficient for specific charge, (%)
I	447.0	20.1	29.1
II	427.4	18.4	30.0
III	281.3	13.0	24.3
IV	599.0	19.2	27.6
V	690.5	27.7	27.5
Total	2445.2	19.8	27.7