This paper summarizes the development and present situation of explosion energy distribution and controlling methods of rock blasting,and put forward some problems which need study furtherIt is pointed out that this study has important theoretical and practical significance
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.
It comes to the conclusion that as for the slope wall bank, the inclined hole blasting has advantages over the straight hole blasting in high utilization rate of explosive blasting energy and good blasting effect, and it is an effective measure to increase the explosive blasting potential.
The technology of large hole spacing and small burden is experienced for borehole blasting, which is augmenting the space between the holes and reducing the space between the rows. The blasting energy is reasonably distributed, and the power rate is reduced accordingly.
Deep hole bench blasting method adopts largely spaced holes to bring explosives blasting energy into full play, to increase breaking rate and to reduce the number of large size blocks, thus to produce desirable rockfill materials.
Large holespacing and small burden blast can enlarge the angle of crater,produce an arc free face beneficial to the intensification of reflecting tensile stress and the distribution of volocity field,anhance the utilization of blasting energy and improve blast efficiency,the parameters of hole patterm are better to be defermined by the test of double hole explosion crater and in light of the principle of free face with equal resistance.
Using detonating cord in a superposition charge can shorten detonation propagation time and improve the efficiency of explosive energy.
The EMR intensities decay with the distance from explosive origins and increase with the explosive energy.
Ground vibration is one of the side effects of blasting, in which way considerable amount of explosive energy is exhausted, and causes decrease in production and even decline in mine development workings.
An exact solution for a spherically-symmetric model of a magneto-radiative shock wave in the solar wind caused by the explosive energy release of a solar flare has been, obtained in the case when energy released is an increasing function of the time.
Incremental explosive energy distribution in blasting design
Mechanism of Control over Blast Energy in Rock Mass by Parallel-Contiguous Charges
The mechanism of controlling the blast energy of contiguous charges by their modifications of the same construction is considered for satisfying the conditions and requirements of mining technologies for explosion.
It is demonstrated that the similar effects may cause redistribution of the blast energy and, as a consequence, the higher seismic efficiency produced by flat charge blasting as compared with concentrated charge blasting.
Effects of blast energy on the process of molten metal drop shaping in atomization
These were modelled in some detail and were found to play a significant role in the dissipation of the blast energy.