Abstract:Tearing cutters are generally applied to break rocks when shield tunnelling in the strata with large size boulders. To improve rock breaking efficiency, the processes of tearing cutter impacting rock model are simulated, and the effects of cutter mass, impact velocity and spacings on specific energy of rock breaking are studied. The results indicate that the impact energy rises significantly by increasing the cutter mass or impact velocity. With the increase of cutter mass or impact velocity, the specific ener… Show more
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