The Effect Of Physics On Rock Breaking Performance Of A Particle Waterjet

2147 Words Sep 14th, 2016 9 Pages
Particle (steel and spherical particles) waterjet is a new type of waterjet that can effectively break rock and other materials. In this study, simulation combined with experimental method was conducted to optimize the jet parameters (i. e., velocity, water pressure, impact time, concentration, diameter, and standoff distance) for modeling the rock breaking performance of a particle waterjet. In particular, the changes in the rock and particle properties after the impact were analyzed based on the Smoothed Particle Hydrodynamics (SPH) method with ANSYS-DYNA software. Rock breaking experiments were performed by changing the particle waterjet parameters, considering the field application. In addition, the effects of particle waterjet parameters on the impact depth and breaking volume were identified. The rock breaking efficiency factor was analyzed with different jet parameters. Overall, the results of simulation are in good agreement with the experiment. The results show that the rebound effect plays an important role in determining the crater diameter. Both the impact depth and breaking volume efficiency factor decrease with increasing water velocity. Because of the longer moving distance and more interference between the particles, the impact depth and breaking volume efficiency factor decrease with increasing impact time and concentration. The impact depth increases rapidly when the impact time is below a critical time (40 s). When the particle concentration exceeds a…

Related Documents