Numerical research on the dynamic rock-breaking process of impact drilling with multi-nozzle water jets

Based on the arbitrary Lagrangian-Eulerian finite element method (ALE-FEM), a coupling model for simulating the rock mass destruction process under the impact of a high-pressure water jet was established. Through the analysis of multi-nozzle jets’ impact on rock surface stress changes, the process of rock breaking and pore formation, and the rock breaking dynamic damage evolution, the mechanism of rock breaking by multi-nozzle jets was revealed...