Numerical Simulation of Rock Breaking by Abrasive Water Jet

Abstract

Ma, X.; Zhu, T.; Fu, Y.; Yan, Y., and Chen, W., 2019. Numerical simulation of rock breaking by abrasive water jet. In: Guido-Aldana, P.A. and Mulahasan, S. (eds.), Advances in Water Resources and Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 274–283. Coconut Creek (Florida), ISSN 0749-0208.In order to analyse the particular feature of rock deformation and breakage in oil and gas resources exploitation, the rock breaking model based on SPH method is established by using the constitutive relation of abrasive material, the corresponding material parameters and the state equations. The three-dimensional dynamic process of rock breaking by abrasive water jet is simulated. The damage and deformation characteristics of the rock with different abrasive concentrations and velocities during the rock breaking process are also studied. The results show that with the increase of abrasive concentration, the depth of deformation in rock increases and the damage area of rock decreases. With the increase of jet velocity, the deformation depth and the damage area of rock increase. Therefore, the effect of rock breaking can be greatly improved by increasing the abrasive concentration and the jet velocity. The accuracy of jet technology and the quality of machined surface can be also improved by adding abrasive into water jet.