水介質(zhì)耦合小藥柱間隔裝藥爆破理論與技術(shù)研究
[Abstract]:With the rapid development of engineering blasting technology, people apply explosive energy to various fields of Yu Guomin production, which brings great convenience and benefit to the society, but also attracts the attention of many researchers at home and abroad. In the open-pit bench blasting, the spacer charge technology shows its superiority over the coupling charge technology, but it can not be divided in multiple sections, and the use of detonation materials is large. On the basis of analysis and research, the technology of water-medium coupled small charge column interval charge blasting is put forward, which has important theoretical and practical significance for improving blasting energy utilization ratio and fine control blasting effect. In this paper, through theoretical analysis, numerical calculation and numerical simulation, the influence factors and advantages of water-medium coupled small charge column interval charge blasting technology are analyzed. The following results are obtained: 1, and the shortcomings of existing spacer charge technology are analyzed. In this paper, the technique of water-medium coupled small charge column interval charge blasting is put forward. Through summing up the previous theoretical analysis, experimental results and engineering practice experience, It is proposed that the main reasons of small charge column extinguishing in water-medium coupled small charge column blasting technology are pipe effect and diameter effect, so the diameter of small diameter charge coil should be larger than the critical diameter, and the length can be controlled according to the pipeline effect. A pipeline effect model based on radial diffusion of exploding gas is established, and the previous experimental results are numerically calculated by grey correlation analysis. The results show that explosive performance and charge structure are the main influencing factors of pipeline effect. Through ANSYS- LS-DYNA numerical simulation, the coupling charge model of water medium and air medium is established, and the calculation results of different charge models are compared and analyzed. The calculated results show that the pipeline effect is more obvious than that in the water medium under the condition of air-medium coupling charge. The relative physical quantities of the hole wall and shock wave region under the condition of coupling charge and water-medium coupling charge are calculated by Matlab. The results show that the energy transfer rate is higher, the energy utilization ratio is higher and the energy distribution is more uniform under the condition of water medium. The technology of water-medium coupled small charge column interval charge blasting can effectively improve the energy utilization ratio of explosives and reduce the amount of explosives used. In order to benefit the blasting effect, the structure of small water-medium coupling charge column interval charge is designed and applied to the blasting scheme design of a quarry, and through the comparison and analysis of the scheme, The results show that the water-medium coupling small charge column interval charge blasting technology can effectively reduce the consumption of materials and reduce the related disasters.
【學(xué)位授予單位】:湖南科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TD235.44
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