Distribution of Explosive Energy Consumed by Coupling Column Charge in Rock
|School||Huazhong University of Science and Technology|
|Keywords||Rock blasting Columnar charge Explosion energy Shock wave Detonation gas Blasting Funnel|
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 .