文献类型：期刊文献

英文题名：Fractal damage and crack propagation in decoupled charge blasting

作者：Ding, Chenxi Yang, Renshu Lei, Zhen Wang, Meng Zhao, Yong Lin, Hai

第一作者：Ding, Chenxi

通信作者：Ding, CX[1]

机构：[1]Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China;[2]Sichuan Univ, Failure Mech & Engn Disaster Prevent & Mitigat, Key Lab Sichuan Prov, Chengdu 610065, Peoples R China;[3]State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China;[4]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China

通信机构：corresponding author), Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China.

年份：2021

卷号：141

外文期刊名：SOIL DYNAMICS AND EARTHQUAKE ENGINEERING

收录：;EI(收录号：20204909566744);Scopus(收录号：2-s2.0-85096878379);WOS:【SCI-EXPANDED(收录号:WOS:000607213900003)】；

基金：This research was supported by: (1) China Postdoctoral Science Foundation (2020M680354), (2) 2020 annual Open Fund of Failure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, Sichuan University, (2020JDS0022), (3) the National Natural Science Foundation of China (51934001, 51664007).

语种：英文

外文关键词：Decoupled charge blasting; Decoupling coefficient; Filling medium; Fractal damage; Energy release rate

摘要：Decoupling coefficient and filling medium are the two key influencing factors that affect the effect of decoupled charge blasting. Using the model experiment method, combined with the fractal damage theory and the energy release rate theory, the fractal damage of the breakage zone, the fracture zone and the crush zone in coupled charge blasting and decoupled charge blasting (respectively using air and clay as the filling medium) is studied, and the energy release rate of the blast-induced crack is analyzed. In decoupled charge blasting, the filling medium plays a role in buffering and weakening the transfer of blasting energy, which inhibits the formation and development of the crush zone and reduces the fractal damage in the breakage zone. However, different filling media (air and clay) have significant differences in the formation of the fracture zone. Reasonable decoupling coefficient can make the energy carrying of the blast-induced crack more concentrated and increase the propagation length, thereby increasing the range of the fracture zone and improving the fragmentation effect.