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1NORMET
COMPARISION OFCARTRIDGE- , ANFO- &
EMULSION CHARGING METHODS
J Lehto
f o r t o u g h j o b s
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2Drilling Railway tunnel, A = 58 m2, round = 365 m3
f o r t o u g h j o b s
Tunnel A = 58 m2Tunnel width 7,5 mTunnel height 8,7 m
Drilling length 6,3 m (22)Pull out length 5,8 m
Parallel cutOpening holes 3 x 102 mmBlasting holes 123 x 51
mm
InitiatingNon-electric detonators
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3Cartridge charging Railway tunnel, A = 58 m2, round 365 m3
f o r t o u g h j o b s
Bottom holesKemix pipecharge 29 x 1000, 6 pc x 0,74 kg = 4,44 kg
/hole12 holes x 4,44 kg = 53,3 kg / roundBottom accecory holesKemix
pipecharge 32 x 1000, 6 pc x 0,90 kg = 5,40 kg/hole5 holes x 5,40
kg = 27,0 kg / roundCut holesCartridge charges 40 mm, 17 x 0,56 kg
= 9,52 kg/hole15 holes x 9,52 kg = 142,8 kg / roundEaser
holesCartridge charges 40 mm, 17 x 0,56 kg = 9,52 kg/hole30 holes x
9,52 kg = 285,6 kg / roundContour accecory holesCartridge 28 mm, 16
x 0,275 kg = 4,4 kg/hole21 holes x 4,44 kg = 93,24 kg /
roundContour holesbottom charge: cartridge 28 mm, 2 pc x 0,275 kg =
0,55 kgcolumn charge: pipecharge 17 x 460, 11 pc x 0,095 = 1,05 kg
40 holes x 1,60 kg = 64 kg / round Total amount of explosive 666 kg
Specific charging 1,82 kg/m3
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4ANFO charging Railway tunnel, A = 58 m2, round 365 m3
f o r t o u g h j o b s
Bottom holesKemix pipecharge 29 x 1000, 6 pc x 0,74 kg = 4,44 kg
/hole12 holes x 4,44 kg = 53,3 kg / roundBottom accecory
holesbottom charge: cartridge 32 mm, 1 pc x 0,370 kg = 0,37
kgcolumn charge: ANFO 2 kg/m, 5 m 10 kg5 holes x 10,35 kg = 51,75
kg / roundCut holesbottom charge: cartridge 32 mm, 1 pc x 0,370 kg
= 0,37 kgcolumn charge: ANFO 2 kg/m, 6 m 12 kg15 holes x 12,37 kg =
185,6 kg / roundEaser holesbottom charge: cartridge 32 mm, 1 pc x
0,370 kg = 0,37 kgcolumn charge: ANFO 2 kg/m, 5 m 10 kg30 holes x
10,37 kg = 311,1 kg / roundContour accecory holesCartridge 28 mm,
16 x 0,275 kg = 4,4 kg/hole21 holes x 4,44 kg = 93,24 kg /
roundContour holesbottom charge: cartridge 28 mm, 2 pc x 0,275 kg =
0,55 kgcolumn charge: pipecharge 17 x 460, 11 pc x 0,095 = 1,05 kg
40 holes x 1,60 kg = 64 kg / round Total amount of explosive 759 kg
Total amount of ANFO 530 kg Specific charging 2,07 kg/m3
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5Emulsion charging Railway tunnel, A = 58 m2, round 365 m3
f o r t o u g h j o b s
Bottom holesKemix pipecharge 29 x 1000, 6 pc x 0,74 kg = 4,44 kg
/hole12 holes x 4,44 kg = 53,3 kg / roundBottom accecory
holesbottom charge: bulkemulsion 1,5 kgcolumn charge: bulkemulsion
800 g/m x 5,2 m = 4,16 kg5 holes x 5,66 kg = 28,3 kg / roundCut
holesbottom charge: bulkemulsion 1,5 kgcolumn charge: bulkemulsion
1800 g/m x 5,2 m = 9,36 kg15 holes x 10,86 kg = 162,9 kg /
roundEaser holesbottom charge: bulkemulsion 1,5 kgcolumn charge:
bulkemulsion 1400 g/m x 5,2 m = 7,28 kg30 holes x 8,78 kg = 263,4
kg / roundContour accecory holesbottom charge: bulkemulsion 0,7
kgcolumn charge: bulkemulsion 600 g/m x 5,2 m = 3,12 kg21 holes x
3,12 kg = 65,5 kg / roundContour holesbottom charge: bulkemulsion
0,7 kgcolumn charge: bulkemulsion 350 g/m x 6,2 m = 2,17 kg40 holes
x 2,87 kg = 114,8 kg / round Total amount of explosive 703 kg Total
amount of bulkemulsion 650 kg Specific charging 1,92 kg/m3
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6Cartridge ANFO Railway tunnel, A = 58 m2, round 365 m3
f o r t o u g h j o b s
Cartridge -chargingExplosive material cost:Cartridge
explosive666 kg/round x 2,5 /kg = 1 665
Charging time:111 holes x 4 min/hole = 444 min
ANFO -chargingExplosive material cost:Cartridge explosive229
kg/round x 2,5 /kg = 573 ANFO explosive530 kg/round x 0,5 /kg = 265
Total573 + 265 = 838 50 % less
Charging time:61 holes x 4 min/hole = 244 min50 holes x 1
min/hole = = 50 minTotal = 294 min 35 % less
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7Cartridge Emulsion Railway tunnel, A = 58 m2, round 365 m3
f o r t o u g h j o b s
Cartridge -chargingExplosive material cost:Cartridge
explosive666 kg/round x 2,5 /kg = 1 665
Charging time:111 holes x 4 min/hole = 444 min
Emulsion -chargingExplosive material cost:Cartridge explosive53
kg/round x 2,5 /kg = 133 Bulk emulsion explosive650 kg/round x 0,9
/kg = 585 Total133 + 585 = 718 60 % less !
Charging time:111 holes x 1 min/hole = 111 min 75 % less !
