炮孔空氣間隔裝藥爆破技術(shù)研究
[Abstract]:The air-spaced charge technology can improve the effective utilization rate of explosive energy, obtain ideal blasting effect, and can effectively control the blasting damage and reduce the blasting cost. It has been widely used in mines and other blasting projects at home and abroad. However, due to the particularity and complexity of blasting test itself, a complete system theory system has not been formed to guide the relevant engineering practice. This paper reviews the development of air spacer charge technology at home and abroad, and attempts to optimize the structure of air spacer charge by means of numerical simulation and field test. The main works are as follows: (1) from the point of view of rock blasting theory, the influence of air-spaced charge structure on blasting effect is analyzed, and the development process of rock blasting theory model and main blasting mechanics application program are summarized. The principle and characteristics of air spacer charge are studied theoretically. (2) from the point of view that the blasting energy can be distributed more evenly, the charge structure is designed, which is staggered between the air spacing positions of adjacent holes. In order to optimize the whole distribution of blasting energy in rock mass and improve the blasting effect. (3) the numerical model of two charge structures is established by using AUTODYN software, and the previous derivation is verified by numerical simulation. The results of numerical simulation are compared and analyzed, and the blasting effects of the two structural models are compared. (4) the blasting construction tests of the two charge structures are carried out at a certain construction site in Fujian Province. The blasting effect of the two charge structures is evaluated from the aspects of rock breaking effect, mass distribution and blasting vibration, and the former theoretical derivation is verified by an engineering example.
【學(xué)位授予單位】:長(zhǎng)沙礦山研究院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TD235.4
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