Towards the prediction of rock excavation machine performance

Recent rock cutting laboratory experiments and field studies on the performance of rock cutting trenchers has provided a better understanding of the processes and factors affecting tool consumption and excavation rates of rock excavation machines. On the basis of this, a model has been developed to assist in the prediction of trenching rates and tool wear in various geological situations. The paper provides an overview of the set-up and results of both laboratory and field studies. It describes a basic framework model of the processes and mechanisms involved in assessing excavation rates and tool consumption and discusses how the acquired knowledge can be used to assist with predictions for future excavation works. It then considers how this knowledge could be applied by practitioners who have to work with a scarcity or absence of good quality and reliable data.