TBM cutter wear prediction in inclined shaft project based on tunnelling parameters

Abstract

Cutter wear is one of the important factors affecting the safety and efficiency of shield or TBM tunnelling. Based on the inclined shaft tunnelling project with long distance, large slope and constant excavation in Bulianta coal mine, regression analysis is applied to investigate the relationship between cutter wear and tunnelling parameters such as cutterhead rotation velocity, cutterhead torque, advance velocity, total thrust and penetration, and thus the prediction model of cutter wear is established. The results indicate that cutter wear is significantly correlated with each tunnelling parameter, and that the regression model expressed by cutterhead torque, total thrust and penetration can account for 97.8 percent of the cutter wear issue induced by potential influencing factors. The model has good effect on the prediction and could provide certain guidance and reference for the cutter wear problem in similar geological condition.