Research on the attenuation of blasting stress wave while propagation in limestone

Abstract

When blasting in rock, the explosive product generates pressure that acts suddenly on the surrounding bore hole, creating a stress wave that propagates in the rock environment. The propagation of the stress wave in the rock mass depends on various factors such as explosive quantity characteristics, rock properties, and blasting conditions. As the distance from the explosion center increases, the intensity of the stress wave gradually decreases. The extent of this decrease depends on the properties of each type of rock, geological conditions, and blasting conditions. Until now, there has not been a comprehensive study on the blasting stress wave propagation process in limestone rock. Therefore, this paper employs an analytical method combined with the simulation model for the propagation process of stress waves in a limestone rock environment during prolonged explosive detonation using the Abaqus software. The preliminary research results reveal the decreasing magnitude of stress wave intensity as a function of radial distance from the explosion center, following an exponential decay law with a decay coefficient falling within the range summarized from experimental studies of various rock types. Furthermore, the propagation velocity values of the stress wave in the far-field from the explosion center also align well with experimental data from published works on limestone rock

Keyword: Blasting; blasting stress wave; detonation wave; blasting in rock; explosion simulation.