Influence of water coupling coefficient on the blasting effect of red sandstone specimens

作     者：Yang Li Renshu Yang Yanbing Wang Dairui Fu Yang Li;Renshu Yang;Yanbing Wang;Dairui Fu

作者机构：School of Mechanics and Civil EngineeringChina University of Mining and Technology(Beijing)Beijing100083China School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing100083China 

出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)

年 卷 期：2024年第11卷第1期

页      面：148-166页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：National Key Research and Development Program of China(2021YFC2902103) National Natural Science Foundation of China(51934001) Fundamental Research Funds for the Central Universities(2023JCCXLJ02) 

主　　题：Water coupling coefficient Radial uncoupled charge Numerical simulation Fractal dimension 

摘      要：This study investigates the impact of different water coupling coefficients on the blasting effect of red *** analysis is based on the theories of detonation wave and elastic wave,focusing on the variation in wall pressure of the blasting *** DDNP explosive as the explosive load,blasting tests were conducted on red sandstone specimens with four different water coupling coefficients:1.20,1.33,1.50,and *** study examines the morphologies of the rock specimens after blasting under these different water coupling ***,the fractal dimensions of the surface cracks resulting from the blasting were calculated to provide a quantitative evaluation of the extent of rock *** scanning and 3D reconstruction were performed on the post-blasting specimens to visually depict the extent of damage and fractures within the ***,the volume fractal dimension and damage degree of the post-blasting specimens are *** findings are then combined with numerical simulation to facilitate auxiliary *** results demonstrate that an increase in the water coupling coefficient leads to a reduction in the peak pressure on the hole wall and the crushing zone,enabling more of the explosion energy to be utilized for crack propagation following the *** specimens exhibited distinct failure patterns,resulting in corresponding changes in fractal *** simulated pore wall pressure–time curve validated the derived theoretical results,whereas the stress cloud map and explosion energy-time curve demonstrated the buffering effect of the water *** the water coupling coefficient increases,the buffering effect of the water medium becomes increasingly prominent.