| The explosive energy of charge in rock is composed of shock wave energy and gaseous explosive energy. Analysis of the distribution of explosive energy can help to improve the blasting effect and blasting performance. During coupling column blasting, the features of deformation and destruction of rock by shock wave, and explosion of cavity by detonation gas are analyzed. Based on these, we discussed the distribution of shock wave energy and gaseous explosive energy, and the solution of every part of energy. At the same time, we also discussed the slung energy by detonation gas, and the connection of slung energy and index of blasting crater.The results can be shown as following:(1) The shock wave energy consumed makes up about 28% of the total energy of the charge. The energy consumed in the course of the cavity and slung accounts for about 50% of the total blasting. The spare energy is about 22%, which consumed in fracturing progress and dissipated in air. (2) When the location of the column charge is between critical location and optimum location, the slung energy increased with the accretion of index of blasting crater. When the location of the column charge is up the optimum location, the slung energy decreased with the accretion of index of blasting crater. At the same time, we make a numerical simulation on rock of coupling column blasting by the FEA software of LS-DYNA. We found rock energy curve with the time moved at shock wave, and discovered the result of numerical simulation and theory calculated is resembled.
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