Numerical Simulation of Rock Breaking Factors with TBM Disc Cutter

The rock breaking effect of TBM is affected by many factors, which can be roughly divided into mechanical factors and engineering environment factors. The mechanical factors include hob ring edge Angle, ring width, single and double edge Angle, etc. Engineering environmental factors include rock strength, rock joint properties, confining pressure and so on. By using ABAQUS finite element software, under the condition of certain disc cutter angle and blade width, the influence of rock strength, joint and confining pressure on TBM rock breaking effect in engineering environmental factors is studied by analyzing the crack propagation and rock breaking force of disc cutter rock breaking process. The influence of disc cutter rock breaking on TBM rock breaking effect is analyzed in depth, which provides a basis for TBM operation prediction. Thus, the excavation efficiency and rock breaking speed of TBM can be improved.