文章基本信息

标题：Experimental and analytical studies to substantiate the blasting operations rational parameters in the hard media destruction
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作者：Ihor Kratkovskyi ; Oleksii Ishchenko
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2019
卷号：109
页码：1-12
DOI：10.1051/e3sconf/201910900040
出版社：EDP Sciences
摘要：The method of sieve analysis studied particle size distribution of the products explosive destruction of sand-cement models with elliptical compensatory cavity in its middle that were destroyed with use of various designs explosive charges and built the cumulative distribution curves. It was established that the area of the newly formed surface of these models destruction products, destroyed by an explosion of variable cross section charges, increased 1.45 times as compared with charges of other structures (boiler in the extension of the charge end, solid structure). The middle diameter of particles increased at 50-60 %. According to the results of the fractional composition, distribution of the products models destruction for different designs and geometric parameters of the compensation cavity has been defined by the regression lines. According to the cumulative distribution curves of the products of destruction of a model with different geometrical parameters of the compensation cavity, around which various designs of explosive charges were exploded, the equations of the regression lines was determined. Based on the obtained dependences of the regression-correlation analysis, mathematical models have been developed to optimize the choice of rational parameters of compensation cavities and explosive charge structures. Recommendations for their use in mines are given.
其他摘要：The method of sieve analysis studied particle size distribution of the products explosive destruction of sand-cement models with elliptical compensatory cavity in its middle that were destroyed with use of various designs explosive charges and built the cumulative distribution curves. It was established that the area of the newly formed surface of these models destruction products, destroyed by an explosion of variable cross section charges, increased 1.45 times as compared with charges of other structures (boiler in the extension of the charge end, solid structure). The middle diameter of particles increased at 50-60 %. According to the results of the fractional composition, distribution of the products models destruction for different designs and geometric parameters of the compensation cavity has been defined by the regression lines. According to the cumulative distribution curves of the products of destruction of a model with different geometrical parameters of the compensation cavity, around which various designs of explosive charges were exploded, the equations of the regression lines was determined. Based on the obtained dependences of the regression-correlation analysis, mathematical models have been developed to optimize the choice of rational parameters of compensation cavities and explosive charge structures. Recommendations for their use in mines are given.