ABSTRACT
This paper describes the calculation model for instantaneous cutter wear designed as a back-calculation and database tool for cutter consumption in TBM tunneling. The software is designed to process larger amounts of data from e.g. TBM cutter logging. The NTNU instantaneous cutter consumption model calculates the instantaneous cutter consumption along the tunnel and between cutter changes. The model expresses the instantaneous cutter ring life in terms of tunnel meter per cutter ring, hours per cutter ring and solid cubic meter per cutter ring. Based on the NTNU instantaneous cutter consumption model, computes the software calculation model these parameters as well as cutter ring per tunnel meter, actual penetration rate, cutter wear based theoretical penetration rate and the wear process indicator (theoretical/actual penetration rate). The paper will focus on the algorithms of the back-calculation model, and compare software results from different cases with the NTNU instantaneous cutter consumption model.
