Return Line

Pipeline that transports slurry from the face of the MTBM to the slurry separation plant. Also known as an outlet line or discharge line.

Reverse

The counter-clockwise rotation of the auger as viewed from the machine end.

Reversing Procedure

Procedure for reversing, if applicable.

Revetment

A wall or a facing of wood, willow mattresses, steel units, stone or concrete placed on stream banks to prevent erosion.

Reynolds Number

A dimensionless quantity named after Osbourne Reynolds who first made know the difference between laminar and turbulent flow. The practical value of the Reynolds NumberA dimensionless quantity named after Osbourne Reynolds who first made know the difference between laminar and turbulent flow. The practical value of the Reynolds Number is that it indicated the degree of turbulence in a flowing liquid. It depends on the hydraulic radius of the conduit, the viscosity of the water and the velocity of flow. For a conduit of... is that it indicated the degree of turbulence in a flowing liquid. It depends on the hydraulic radius of the conduit, the viscosity of the water and the velocity of flow. For a conduit of a given size, the velocity is generally the major variable and the Reynolds Number will increase as the velocity of flow increases.