Environmental Engineering Reference
In-Depth Information
Table 7.26 Brisance of 80/20 nitrate-o-ethylbenzene explosives at low temperature
Nitrate acid concentra-
tion (%)
Experimental conditions
Brisance
(mm)
90
Not storage, temperature +6
°
C
24.00
90
Not storage, temperature
35
°
C (with dry ice to
24.05
−
55
°
C)
−
90
Storage for one month
23.50
Table 7.27 Comparison results of nitrate-o-ethylbenzene, 40 % gum explosive, and 60/40 RDX
used as detonation agents in blasting crater with different sizes [
50
]
ID Detonation agents
Explosives to be
detonated
Blasting crater size
(m)
Detonation
medium
Name
Quantity
(g)
Name
Quantity
(g)
Diameter Visible
depth
(m)
Hard tack
loess
1
40 % gum
explosive
800
no. 4 slurry
explosive
4,000
1.95
0.65
Dense wet
tailings
2.20
0.75
2
80/20
O-nitrate
explosive
400
no. 4 slurry
explosive
4,000
2.35
0.81
Dense wet
tailings
2.25
0.78
3
80/20
O-nitrate
explosive
400
no. 4 slurry
explosive
3,600
2.50
0.76
Dense wet
tailings
2.18
0.71
4
80/20
O-nitrate
explosive
400
no. 4 slurry
explosive
3,600
2.38
0.79
Dense wet
tailings
2.28
0.73
5
60/40 RDX
400
no. 4 slurry
explosive
3,600
3.15
0.94
Dense wet
tailings
200
3,800
2.80
0.88
100
3,900
2.50
0.75
(5) Detonation Effect of Nitrate-o-Ethylbenzene
80/20 nitrate-o-ethylbenzene is placed in the oxidize iron stair holes to detonate
4th slurry explosives, the results are compared with results generated by ANFO
under the same conditions. Experimental conditions: The height of mining stair is
12 m, the depth of hole is 14.5
16 m, the charge amount of slurry explosives is
-
350
400 kg. 1.5 kg Nitrate-o-ethylbenzene are placed into plastic bottle, each relay
initiating explosive kit is placed at the top, middle, and bottom of the hole, and each
kit consists of four to
-
five bottles that are tied together, and the detonating cord
circle one of kit as the initiation source. The whole instrumentation is given in
Fig.
7.4
.
Good detonation results were generated using the nitrate-o-ethylbenzene as the
relay initiating explosives to detonate slurry explosives, and it indicates that nitrate-
o-ethylbenzene can replace RDX.
