Tunnel boring machines suitable for the compound geology produced by Kawasaki Heavy Industries,Ltd., have 2 kind of spoil discharge systems,"the spoil discharge system on a conveyer belt" and "the spoil discharge system by the screw conveyer". A spoil discharge system can be chosen according to construction conditions.

In a rock stratums, Tunnel boring machines suitable for the compound geology made from Kawasaki Heavy Industries,Ltd., is excavated by "the spoil discharge system on a conveyer belt", and is excavated by "the spoil discharge system by the screw conveyer" which thought the mountain stop function as important at soft ground.

Conveyer belt equipment	Screw-conveyer equipment