Numerical simulation on radiation and energy of blast-induced seismic waves in deep rock masses

作     者：YANG Jian-hua WU Ze-nan SUN Wen-bin YAO Chi WANG Qiu-hui 杨建华;吴泽南;孙文彬;姚池;王秋慧

作者机构：School of Civil Engineering and ArchitectureNanchang UniversityNanchang 330031China Power China Jiangxi Electric Power Engineering Co.Ltd.Nanchang 330096China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2022年第29卷第2期

页      面：645-662页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0806[工学-冶金工程] 08[工学] 0708[理学-地球物理学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Projects(51969015,U1765207)supported by the National Natural Science Foundation of China Projects(20192ACB21019,20181BAB206047)supported by the Natural Science Foundation of Jiangxi Province,China 

主　　题：blasting in-situ stress seismic wave rock fracture SPH-FEM 

摘      要：With regard to blasting in deep rock masses,it is commonly thought that an increase in the in-situ stress will change the blast-induced rock crack propagation and ultimately affect rock ***,little attention has been given to the change in seismic wave radiation when the fractured zone changes with the in-situ *** this study,the influences of in-situ stress on blast-induced rock fracture and seismic wave radiation are numerically investigated by a coupled SPH-FEM simulation *** results show that the change in blast-induced rock fracture with in-situ stress has a considerable effect on the seismic wave energy and *** the in-situ stress level increases,the size of the fractured zone is significantly reduced,and more explosion energy is transformed into seismic energy.A reduction in the size of the fractured zone(seismic wave source zone)results in a higher frequency content of the seismic *** a nonhydrostatic in-situ stress field,blast-induced cracks are most suppressed in the direction of the minimum in-situ stress,and thus the seismic waves generated in this direction have the highest energy *** addition to P-waves,Swaves are also generated when a circular explosive is detonated in a nonhydrostatic in-situ stress *** S-waves result from the asymmetrical release of rock strain energy due to the anisotropic blast-induced fracture pattern.