The interaction of machine and rock mass analysed using TBM data and rock mass parameters / Interaktion Maschine-Gebirge analysiert mittels TBM-Daten und Gebirgskennwerten

Statistical investigations of TBM data and rock parameters have shown that interactions determined theoretically or in the laboratory are often not realistic because the interaction of the machine with the rock mass is considerably influenced by the type of machine in use, the machine driver and the characteristics of the rock mass. Evaluations of excavation data have shown that the maximum net advance rate is not produced by the maximum thrust force, even in the same rock type. Individualised optimisation of the interaction on the basis of continuously recorded machine data and basic information about the rock mass (type of rock, degree of jointing), which can be determined by geological and geophysical investigations during tunnelling, is therefore of particular significance for economical tunnelling. The evaluation of these data should not replace but rather supplement the control of the machine by the driver.