UNT
Oliver Gago
Porras
GEOMECHANICAL
ROCK
CHARACTERIZATION
MC
Ø
HEAVY ANFO + ME gasified
FLY ROCK
IDEAL ¡¡¡¡¡
POWDER FACTOR
yd3
KB
50 + 7
45/9.25=4.86
57 - 12
23
30
23*30*50/27
9.25/2 = 4.125
12
12
4.5
12
4.5
DRILLING COSTS
DESCRIPTION SYMBOL
FORMULA
Cown
Own Cost
Operating Cost Cop
Bit life
BL
BL
Bit cost
BC
Drill cost
DC DC = ( (Cown+Cop) BL(hr) + BC) / BL (ft)
MAG UNIT
8 $/hr
2,5
192
1700
200
1,30
$/hr
hr
feet
$
$/ft
+94,6 NA + 0,06 D2
2.8
DRILLING COSTS
DESCRIPTION SYMBOL
FORMULA
Cown
Own Cost
Cop
Operating Cost
Bit life
BL
BL
Bit cost
BC
Drill cost
DC
DC = ( (Cown+Cop) BL(hr) + BC) / BL (ft)
MAG
8
UNIT
$/hr
2,5
192
1700
200
1,30
$/hr
hr
feet
$
$/ft
+150.000 / 2.4 / 1280=48043 holes
+$7280/64,000 yd3
$3705/64,000 yd3
3. TOTAL COST = Blasting + Driling =
$ 0.171/ yd3
63,000 x 2.4
7416/63000
BAST +DRILL COST
$0.189/yd3
Modelo Ash
Powder Factor Example