KOKEN BORING MACHINE
COMPANY PROFILE COMPANY STATEMENT INVESTOR RELATION PRODUCT INFORMATION CONTRACTING
RAISE DRILLING METHOD RAISE DRILLING METHOD RAISE DRILLING METHOD
RAISE DRILLING METHOD
Exploration Drilling
Offshore drilling
Environmental Solutions
Waterwell Drilling
PercussionWireLineSampling
Big Hole Rock Drilling
Soil Stabilization
Grouting
Special Drilling
Anchoring
 
The“Bigman” Raise Boring Method was originally developed by KOKEN. It pierces a pilot hole to an underground tunnel or the like precisely, attaches a reaming bit as big as six meters and pulls the reaming bit from underground toward the ground to make a large vertical shaft. It is environmentally friendly, since it uses no muddy water or stabilizing liquid which is turned into industrial waste, in reaming digging.
BM-500A
The largest raise boring machine in Japan, the Bigman BM-500A
(Maximum reaming diameter : 6,000mm)
pilot boring Penetrated pilot boring Pilot hole drilling
Pilot hole drilling
BM-100N Venitilation shaft raise drilling with BM-100N Reaming
Reaming
up-reaming Completion of up-reaming by raise drilling vertical shaft
Completed vertical shaft
(Approx. 5 meters in diameter)
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