Dissertation > Industrial Technology > Building Science > Construction > The project and the type of work > Earthwork > Blasting

Distribution of Explosive Energy Consumed by Coupling Column Charge in Rock

Author ZhangFengTao
Tutor YangWenBing
School Huazhong University of Science and Technology
Course Engineering Mechanics
Keywords Rock blasting Columnar charge Explosion energy Shock wave Detonation gas Blasting Funnel
CLC TU751.9
Type Master's thesis
Year 2007
Downloads 156
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Rock Zhongzhuang Explosion explosion energy can be divided into the energy of the blast and detonation gas expansion energy . The theoretical analysis of the distribution of the explosion energy helps to improve blasting effect and improve the quality of blasting . Columnar coupling charge case , the analysis of the shock wave , rock deformation and failure characteristics of detonation gas explosion cavity reamed investigate the blast energy and the detonation gas expansion energy distribution law , on this basis , and the energy consumption of the various parts of the solution method , consider the case of the depth above the critical depth the detonation gas of broken rock throwing as well as in different depth of relationship between blasting funnel index n and heave energy . The calculation results show that : (1) the shockwave acting energy consumed about 28 % of the total energy ; detonation gas is used to the reamed and heave energy rock about 50% of the total energy , the remaining 22 % of the energy used to drive bifida and dissipated in the air . ( 2 ) When the depth of charge between the critical depth and the best depth of heave energy with the increase of n increases; charge depth above the optimum depth of throwing with n increases. While taking advantage of LS ? DYNA finite element software for numerical simulation of rock blasting in the case of columnar coupling charge energy curves of the rocks under shock loads , and found that the numerical simulation results and theoretical calculations little difference .

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