modul drilling
DESCRIPTION
drill modulTRANSCRIPT
Percussion/Churn Drilling: Rotary Drilling: Diamond Core Drilling:
Core DrillingTruck
Mounted
Drill Rods
Drill Cores
Core Placing and Wrapping
(Coring)
Core recovery RQD (Rock quality designation) Logging
– Lithology & Geologic structure– Rock mechanic properties– Water inflow
Core splitting (Assay + Back up)
Core Size (Wireline core barrel)
EX 7/8 in
AX 1-3/16 in
BX 1-5/8 in
NX 2-1/8 in
AQ 1-1/16
BQ 1-7/16
NQ 1-7/8
HQ 2-1/2
PQ 3-11/32NX
Costs Rotary Percussion Core
Sandstone 1-2 3-6 20-30
Carbonate 1-4 4-6 20-35
Igneous 6-12 15-32
Drill Pattern
Drill Spacing
- (Exploration) 800 1000 m - 200800(Definitive) m - 20150(Development) m
Disseminated Gold
Exploration drill spacing = 200m Definitive drill spacing = 80-100m Development drill spacing = 40-50m
ตั�วอย่�าง Porphyry Copper
Exploration drill spacing = 200m Definitive drill spacing = 80-100m Development drill spacing = 40-50m
Uranium
Exploration drill spacing = 800-1600m Definitive drill spacing = 300m (vein) -
900m (Sediment) Development drill spacing = 15-45m
- Rotary 4 5 in, Assay Interval 1 .5 m, Cor e NX
Coal
Exploration drill spacing = 500-1000m
Definitive drill spacing = 80-100m Development drill spacing = 25m
Tin (Placer deposits)
Exploration drill spacing = 200-500m Definitive drill spacing = 100-150m Development drill spacing = 40-50m
Chur n Dr i l l Assay Interval 0.3m
Oil Shale
Exploration drill spacing > 2000m Definitive drill spacing = 1000-2000m Development drill spacing = 500m