Indau Raise Borers are designed to meet the demands set by extreme conditions. To ensure this, the technical components and operational stability of the machines have been perfected to the last detail. The Indau range of Raise Borers consists of seven machine models for maximum shaft diameters of 1,8 7m in hard rock and 2.4 8.2m in softer formations. Raise lengths up to 1200m. This means easy transport and handling, which is important especially in narrow mines and by helicopter transport in roadless terrain.
Pilot hole flushing medium is usually water, which can be re-circulated.
Also air or foam can be used. The hydraulic drive and control systems ensure troublefree operation in underground mines with sulphuric air or high iron dust level.