Open AccessNumerical Analysis and Application of Uncoupled Coefficient of Water Sealed Blasting on Blasting Effect
Author(s) -
Jiangchao Liu,
Wen Gao,
Shenghui Zhang,
He Xu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/719/3/032035
Subject(s) - decoupling (probability) , rock blasting , explosive material , mechanics , materials science , geotechnical engineering , engineering , chemistry , physics , organic chemistry , control engineering
To study the influence of axial and radial uncoupling coefficient on blasting effect when air and water are used as spacer in surrounding holes of tunnel water seal blasting, and the optimal charge coefficient is determined for construction. Combined with numerical simulation and field test, the research results show that: (1) When the air and water are used as the interval medium in the peripheral hole for multi-hole blasting, the optimal value range of axial uncoupling coefficient is 2.2∼2.5. The optimal value range of radial uncoupling coefficient is 1.5∼1.6. (2) The concept of composite uncoupling coefficient is proposed, and the optimal decoupling charge coefficient is determined. Finally, the axial decoupling coefficient is 2.2 and the radial decoupling coefficient is 1.6, which can meet the blasting requirements. (3) The simulation results are verified by field test. It is proved that the axial decoupling coefficient is 2.2 and the radial decoupling coefficient is 1.6, which is better than the research results of axial decoupling coefficient of 2.07 and radial decoupling coefficient of 1.5 used in conventional blasting. The results show that the air and water media used in engineering construction can improve the blasting effect and reduce the explosive unit consumption.