Performance Analysis And Development Of New Models For Performance Prediction Of Hard Rock Tbms In Rock Mass

Download or read book Performance Analysis and Development of New Models for Performance Prediction of Hard Rock TBMs in Rock Mass written by Ahmad Ramezanzadeh and published by . This book was released on 2005 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study is an attempt was made to improve our understanding of rock cutting process by hard rock Tunnel Boring Machines (TBM) and evaluate the impacts of rock mass properties on machine performance. To achieve these objectives, an extensive database on filed observations of TBM performance in various projects and rock mass conditions data has been established. This database includes the data from 10 different job sites with more 60 km of total length of bored tunnels. A set of new empirical performance prediction models have been developed with reasonably high degree of correlations by performing a series of multiple regression analysis. Also a new Rock Mass Adjustment factors for Colorado School of Mines (CSM) prognosis model has been de-rived from the statistical analysis. The accuracy of developed models and adjustment factors has been verified by comparing the observed data with estimations provided by NTNU and CSM models. A very close agreement has been obtained.