The Charge Structure Of The Explosion Energy Transfer Pilot Study

In this paper, the course of transition and transformation of blast energy in rock blasting were analyzed detailedly, the energy matching relationship of explosion between rock was discussed as well. Making use of the theory of rupture and damage of rock, the author macroscopically and microcosmically studied the spread behavior of rock cracks under the effect of blasting loads. The influence of such factors as the position of charge in the borehole, decouple coefficient, couple mediums, etc to transition of blast energy was analyzed by the numbers. Taking advantage of dynamics theory of detonation gas and the theory of stress wave, the author stated the distinction of effect mechanism of the air post of charge between borehole bottom and of the charge between charge when borehole bottom and middle discontinuous charge. According to the distinction of the two variable mediums of air and water in physics behaviors, the author compared the influence of the structure to blast energy of air decouple charge with that of the water decouple charge and obtained incidence pressure at the bore wall passion, shock pressure and the relationship of quasistatic pressure between decouple coefficient on theory. Using the model test in lab, comparing the pressure, distortion condition and the distribution of blasting blocks under the air-couple and water-decouple charge blasting, the author made clear the theoretical analysis was correct and reasonable. In conclusion, the study of this paper provided a reliable theoretical base to the reasonable optimization of charge structure and the effective usage and controlling of blast energy.