Tunnel boring machines (TBMs) make rock tunneling an easy task to complete. However, variations of ground at tunnel sites often lead to different problems including boreability and tool wear, support and instability, groundwater pressure and inflow, stress, squeezing and spalling. TBM excavation in rock encounters two major problems: rock fragmentation and tunnel stability. In such cases, achieving the best penetration rate entails understanding the rock fragmentation mechanism through the interaction process between cutter and rock mass thus optimizing TBM cutter and cutterhead design.
|Number of pages||3|
|Specialist publication||T & T International|
|Publication status||Published - 1 Sep 2006|