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This paper describes a numerical data set comprising the three-dimensional fracture network of a 1 m 3 block of Bodmin granite. The data set can be downloaded from the following web sites: www.elsevier.com/ijrmms , www.leeds.ac.uk/StochasticRockFractures and www.ecms.adelaide.edu.au/civeng/research/StochasticRockFractures . The purpose of this paper is to provide the scientific community with a true data set that can be used to validate models and simulations of fractured crystalline rock masses. The methodology for procuring additional data sets is also described.

Laboratory cutting tests have been performed in hard rock utilising an instrumented SO tonne capacity rock planer. The experiment involved intermittent cutting of felsic gneiss up to a maximum of 20 m or until tool failure, Each cutting tool was fitted with a thermocouple in the tungsten carbide insert to monitor the insert tip temperature. The cutting forces and tool wear were also monitored. Cutting was conducted with and without high pressure water jet assistance (HPWJA). The results show that a dependence exists between the tool temperature and the tool normal force component. HPWJA enhances the tool life and acts as a heat sink during cutting. An elementary model is proposed to explain the findings and provide a theoretical basis for anticipating high tool wear.