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 |