EXPERIMENTAL RESEARCH ON THE PROPAGATION PARAMETERS OF EXPLOSIVE STRESS WAVE IN CORAL CONCRETE

Abstract

This study investigates the propagation of stress waves in coral concrete material under explosive conditions. The experimental system was designed to analyze the stress wave characteristics in coral concrete, focusing on the velocity and attenuation of the stress waves as they pass through the material. The study used explosive charges placed at specific depths within boreholes to generate the stress waves, with pressure sensors deployed to record the intensity of the waves at different distances from the center of the explosion. The results obtained are the stress wave intensity over time at different distances from the center of the explosion. Using regression analysis, the propagation velocity of the stress waves was determined, and the attenuation coefficient was calculated based on distance. It was found that the blast-induced stress wave attenuation coefficient in coral concrete with a compressive strength class equivalent to B22.5 is 1.272, while the propagation velocity of the blast-induced stress wave ranges between 3658 m/s and 3817 m/s, with a minimal measurement error of 1.18%. These findings provide valuable insights into the dynamic behavior of coral concrete, contributing to the establishment of formulas for calculating stress wave intensity and blast loading in coral concrete.