Abstract:

On the deep open pit coal mines, water inside the borehole is a direct factor affecting the efficiency of rock breaking and increasing the cost in the blasting process. Currently, there are various methods for assessing the impact of water on blasting efficiency. These include the use of specialized simulation software and high-precision computational models for analysis. With the application of the combined finitediscrete element method (FDEM) and smoothed particle hydrodynamics (SPH) on LS-DYNA software, 2D simulations of the rock-breaking process in dry and water-saturated environments have been conducted. The simulation results provide a basis for evaluating the impact of water inside the borehole on the blasting efficiency, thereby proposing technological solutions to enhance the blasting efficiency in deep open pit coal mines.