Numerical Analysis of Dynamic Response Mechanism of Rock by TBM Disc Cutter
نویسندگان
چکیده
The dynamic response mechanism of the rock fragmentation and its influential factors by TBM disc cutter are studied in this paper. Firstly, a dynamic response model is established based on the fracture mechanics and finite element theory. Secondly, a fragmentation rule is founded according to the dynamic response model, and then numerical simulations for dynamic response of rock are carried out. Lastly, cutting experiments are carried out in order to check the numerical simulation. The simulation and experiment results for different rocks show that the rock cutting depth and the crushing region decrease with increase of the rock compressive strength. The simulation and experiment results for different loads show that the fragmentation scale is proportional to the cutting force for the same rock.
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