Excerpt from the book Sprayed Concrete: Properties, Design and Application edited by S.A. Austin and P.J. Robins published by Whittles Publishing, 1995 Chapter 8: Design of Tunnel Support 8.1 Introduction ............................................................................................150 8.2 New Austrian Tunnelling Method (NATM) ..............................................151 8.3 Norwegian Method of Tunnelling (NMT, incorporating the Q system) ....157 8.4 Conclusion .............................................................................................168 References ..................................................................................................170