ABSTRACT
Roadheader type machines are now widely used in mining and tunnelling applications, and encountering the full spectrum of ground conditions. This study examines the key geological and geotechnical factors that influence machine performance and uses a series of influence diagrams to illustrate the complexity of the cutting process. A classification scheme is presented which can be used to predict the performance of a given machine under particular geotechnical conditions. The scheme has been compiled using case history data and research work, and is similar in principle to the Rock Mass Rating scheme. Genuine case studies have been used to calibrate and confirm the ability of the new Scheme to reliably predict roadheader performance.
