Table 2: Charge Parameters of Columns with Different Sectional Dimensions.

NO. Sectional Dimensions (cm×cm) Hole Depth (cm) Charging Structure Explosive Charge (g) Bottom Explosive Charge (g) Interval Length (cm) Upper Explosive Charge (g) Length of Stemming (cm)
1 60×50 40 Continuous 150 150 0 0 25
2 120×50 95 Interval 300 200 30 100 35
3 60×60 40 Continuous 150 150 0 0 25
4 120×60 95 Interval 300 200 30 100 35
5 50×50 38 Continuous 100 100 0 0 38
6 110×50 90 Interval 250 150 30 100 35
7 80×50 60 Interval 200 100 15 100 25
8 80×40 60 Continuous 150 150 0 0 45
9 100×50 75 Interval 200 100 25 100 30